Spanish Journal of Agricultural Research最新文献_第4页

Potential land use of Cantabria for grass-fed milk production 坎塔布里亚用于草饲牛奶生产的潜在土地利用

4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-09-28 DOI: 10.5424/sjar/2023214-19920

Ibán VÁZQUEZ-GONZÁLEZ, Francisca RUIZ-ESCUDERO, Juan BUSQUÉ, Ana VILLAR

{"title":"Potential land use of Cantabria for grass-fed milk production","authors":"Ibán VÁZQUEZ-GONZÁLEZ, Francisca RUIZ-ESCUDERO, Juan BUSQUÉ, Ana VILLAR","doi":"10.5424/sjar/2023214-19920","DOIUrl":"https://doi.org/10.5424/sjar/2023214-19920","url":null,"abstract":"Aim of study: To analyse the territorial potential of Cantabria to produce grass-fed milk. Area of study: Cantabria (N Spain) is a territory associated with livestock, in particular cattle and grasslands. Over the last few decades, the livestock sector has been immersed in a process of structural adjustment, leading to a reduction in the number of farms, an increase in their size and the intensification of production. Moreover, the market is being increasingly supplied with milk labelled “grass fed”, due to growing consumer interest in healthier and more environmentally friendly products. Material and methods: To do this, 99 livestock farms were classified according to the percentage of fresh grass (FG) in the spring diet of the lactating cows (non-grass-fed: <25% FG; grass-fed: ≥25% FG); these were characterized and, subsequently, a multiple linear regression analysis was carried out to estimate the percentage of FG based on 41 territorial variables. Main results: The predicted feeding model had an accuracy rate of 70.7%, and discriminated better the non-grass-fed, it had some limitations, suggesting that territorial structure is important but not enough to differentiate grass-fed milk. In addition, 33% of the farms studied produce grass-fed milk, but only half do so under territorial conditions typically associated with this type of production. Meanwhile, 12% of the farms, with similar territorial conditions, do not carry out this type of production (grass fed). Research highlights: To support grass-fed production, other internal, cultural or economic values must be taken into account.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135425215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Clinical course and pathogenicity of a Mycobacterium avium subsp. paratuberculosis isolate from scimitar oryx (Oryx dammah) in experimentally infected rabbits 禽分枝杆菌亚种的临床病程和致病性。从实验感染家兔的弯角羚(oryx dammah)中分离出的副结核

4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-09-27 DOI: 10.5424/sjar/2023214-19896

Edith MALDONADO-CASTRO, Ana L. HERNÁNDEZ-REYES, Beatriz ARELLANO-REYNOSO, Carlos G. GUTIÉRREZ, Marta ALONSO-HEARN, Gilberto CHÁVEZ-GRIS

{"title":"Clinical course and pathogenicity of a Mycobacterium avium subsp. paratuberculosis isolate from scimitar oryx (Oryx dammah) in experimentally infected rabbits","authors":"Edith MALDONADO-CASTRO, Ana L. HERNÁNDEZ-REYES, Beatriz ARELLANO-REYNOSO, Carlos G. GUTIÉRREZ, Marta ALONSO-HEARN, Gilberto CHÁVEZ-GRIS","doi":"10.5424/sjar/2023214-19896","DOIUrl":"https://doi.org/10.5424/sjar/2023214-19896","url":null,"abstract":"Aim of study: To evaluate the infectivity of a MAP type C of a scimitar oryx (Oryx dammah) - included in an international conservation list- that showed clinical signs and granulomatous enteritis associated with paratuberculosis in rabbits (Oryctolagus cuniculus) using molecular, bacteriological and pathological methodologies. Area of study: The study was made in Tequisquiapan, Queretaro, CEIEPAA, FMVZ, UNAM, Mexico. Material and methods: Three 6-week-old female New Zealand rabbits were orally infected for 3 consecutive days with 109 CFU of the MAP isolate. Blood and fecal samples were collected every 2 weeks for a total period of 28 weeks. IS900 PCR in blood and F57 real-time PCR in the feces were performed every 2 weeks and pathological analysis and bacteriological culture from tissue were made 28 weeks post infection. Main results: MAP was detected by IS900 PCR in the blood of two of the three animals after 2 weeks of infection and again by F57 real-time PCR in the feces of the three infected rabbits. Infection with the MAP isolates in feces at 22 and 28 weeks post infection in one rabbit and isolate of vermiform appendix resulted in the development of granulomatous lesions in the three rabbits. The lesions were diffuse intermediate in one animal and multifocal in the other two rabbits. Research highlights: Overall, these results demonstrated the infectivity of a MAP isolate from the scimitar oryx in rabbits.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135585173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of soil compaction induced beneath the working depth due to tilling action of different active tillage machinery 不同主动式耕作机械耕作作用对工作深度以下土壤压实的影响分析

4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-09-26 DOI: 10.5424/sjar/2023214-20351

Kumari NISHA, Ganesh UPADHYAY, Bharat PATEL, Naresh SIHAG, Swapnil CHOUDHARY, Vijaya RANI

{"title":"Analysis of soil compaction induced beneath the working depth due to tilling action of different active tillage machinery","authors":"Kumari NISHA, Ganesh UPADHYAY, Bharat PATEL, Naresh SIHAG, Swapnil CHOUDHARY, Vijaya RANI","doi":"10.5424/sjar/2023214-20351","DOIUrl":"https://doi.org/10.5424/sjar/2023214-20351","url":null,"abstract":"Aim of study: To quantify the data regarding soil compaction induced beneath the tillage working depth purely due to the tilling action of the different active tillage machinery in sandy loam soil. Area of study: Research Farm, CCS Haryana Agricultural University, Hisar, Haryana, India Material and methods: The data were quantified in terms of cone index (CI), bulk density, and porosity. Its comparison was also made with conventional practice followed by the farmers, involving only passive-tillage tools (i.e. cultivator and disc harrow). The results did not represent the tractor-imposed soil compaction under the tires. Main results: The maximum soil compaction beneath the working depth in terms of increment in soil CI occurred with rotavator followed by conventional practice, PTO-operated disc tiller, and power harrow, which are in the range of 6.67-7.05%, 5.17-5.29%, 4.29-4.97%, and 2.08-2.36%, respectively. The increment in bulk density was similar to that as mentioned above with values in the range of 3.96-4.06%, 2.30-2.42%, 1.71-1.88%, and 1.31-1.40%, respectively. Furthermore, the maximum decrement in soil porosity occurred with rotavator followed by conventional practice, PTO-operated disc tiller, and power harrow which were in the range of 5.67-6.61%, 2.74-2.94%, 1.71-1.88%, and 2.06-2.25%, respectively. Research highlights: The active tillage rotary machinery cause soil compaction due to the applied compressive force on the soil during their tilling action. They create optimal topsoil tilth but can compact deeper soil due to blade speed, necessitating the selection of ideal rotational and forward speeds to minimize this compaction.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134886352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of operational parameters on the performance of a kenaf harvester 操作参数对红麻收割机性能的影响

4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-09-19 DOI: 10.5424/sjar/2023214-19688

Thomas A. AYORINDE, Oseni K. OWOLARAFE

{"title":"Effect of operational parameters on the performance of a kenaf harvester","authors":"Thomas A. AYORINDE, Oseni K. OWOLARAFE","doi":"10.5424/sjar/2023214-19688","DOIUrl":"https://doi.org/10.5424/sjar/2023214-19688","url":null,"abstract":"Aim of study: To develop a kenaf harvesting technology, that will improve kenaf production efficiency. This study evaluated the effect of some operation parameters on the performance of a tractor-mounted kenaf (Hibiscus cannabinus L.) harvester. Area of study: The experiment was performed at the Teaching and Research Farm of the Obafemi Awolowo University, Ile Ife, Nigeria. Material and methods: The experiment was initiated after 10 weeks of planting kenaf on the experimental field. The experimental design was a 3 × 4 × 5 experiment evaluating the effect of kenaf maturity (average stem diameter at week after planting (WAP) 10, 12, 14 and 16), kenaf varieties (‘Cuba 108’, ‘Ifeken 400’ and ‘Ifeken Di 400’) and forward speed of the tractor (2, 3.5, 5, 6.5 and 7.7 km/h) on effective field capacity, field efficiency, and operational loses of the machine. Main results: The effective field capacity of the machine decreased with increase in plant maturity and increased with increase in forward speed of the machine. The optimal value of the effective field capacity was 2.13 ha/day, when harvesting ‘Ifeken 400’, at crop maturity of 10 WAP, and forward speed was 5 km/h. The field efficiency of the machine was found to decrease with increase in crop maturity and forward speed of the machine. The field efficiency of the machine was 97%, with ‘Ifeken 400’ crop maturity of 10 WAP and forward speed of 2 km/h. Research highlights: The crop maturity, Kenaf variety and forward speed of tractor have effect on the effective field capacity, field efficiency and the operational loss of the tractor-mounted kenaf harvester","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135014735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testing local isolates of entomopathogenic nematodes against the green stink bug Nezara viridula L. 昆虫病原线虫对绿蝽Nezara viridula L。

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-08-07 DOI: 10.5424/sjar/2023213-20239

M. V. Pushnya, E. Rodionova, I. Balakhnina, E. G. Snesareva, O. Kremneva, V. Ismailov

{"title":"Testing local isolates of entomopathogenic nematodes against the green stink bug Nezara viridula L.","authors":"M. V. Pushnya, E. Rodionova, I. Balakhnina, E. G. Snesareva, O. Kremneva, V. Ismailov","doi":"10.5424/sjar/2023213-20239","DOIUrl":"https://doi.org/10.5424/sjar/2023213-20239","url":null,"abstract":"Aim of study: The green vegetable bug Nezara viridula L. is a polyphage that is spread all over the world, but in the last 10 years it has entered the territory of the Russian Federation. The use of biological protection against this pest is an important task in the country. We used the entomopathogenic nematodes (EPN) Steinernema feltiae and Steinernema carpocapsae to control N. viridula. \u0000Area of study: Federal Research Center of Biological Plant Protection (FRCBPP), Krasnodar Krai, Russia, 2019-2020. \u0000Material and methods: A laboratory test was carried out with adults and nymphs of N. viridula. Each species of EPN (S. carpocapsae and S. feltiae) was used at doses of 50, 75 and 100 individuals infective larvae per insect. The initial material for analysis was collected on soybean crops in the crop rotation of the FRCBPP. The experimental results were assessed using ANOVA. \u0000Main results: Laboratory tests of the EPN S. carpocapsae and S. feltiae caused the death of up to 98.0% of nymphs and up to 91.4% of adults of N. viridula. The species S. feltiae turned out to be the most effective, as allowed the pathogen to develop in shorter periods of time, and caused the death of 81.9-91.4% adults and of 92.0-98.0% nymphs. \u0000Research highlights: This study showed that during the period of growth and development of larvae, the use of EPN is more effective in nymphs than on adults.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42458936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A method to optimize the pesticide dose considering the combined influence of plant, pest, pesticide, and spray equipment on bioefficacy 一种考虑植物、害虫、农药和喷洒设备对生物药效综合影响的农药用量优化方法

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-07-31 DOI: 10.5424/sjar/2023213-19738

Divaker Durairaj, B. Jyoti

{"title":"A method to optimize the pesticide dose considering the combined influence of plant, pest, pesticide, and spray equipment on bioefficacy","authors":"Divaker Durairaj, B. Jyoti","doi":"10.5424/sjar/2023213-19738","DOIUrl":"https://doi.org/10.5424/sjar/2023213-19738","url":null,"abstract":"Aim of the study: To develop a method to optimize the pesticide dose considering the combined influence of plant, pest, pesticide, and spray equipment on bioefficacy. \u0000Area of study: Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, India. \u0000Material and methods: A controlled droplet applicator generated droplets from 200 to 50 μm. The target leaf's deposition density of a preset droplet size can be controlled by timing the spray. A sequence of bioassays was performed at various droplet densities at each pesticide (imidachloprid 17.8% SL) dose and droplet size to determine the mortality of cotton aphids (Aphis gossypii) and jassids (Amrasca biguttula) feeding on immature cotton plants. Calculating the number of droplets per target area needed to cause 50% and 90% mortality (LN50 and LN90) yielded a series of model curves. Field tests were done on the computed optimal doses of the pesticide for a spray apparatus (electrostatically charged spray) to assess the spray's bioefficacy against A. gossypii and A. biguttula. \u0000Main results: In comparison to uncharged mist blower spray, which had a bioefficacy of 91% for an LN90 dose of 110 g a.i. L-1, the spray had an 89% bioefficacy on A. gossypii. Using the electrostatic spray, it was 91% effective against A. biguttula and 98% effective against an uncharged mist blower at a dose of 110 g a.i. L-1 of LN90. \u0000Research highlights: This generalized method of modelling could effectively compute the optimal pesticide dose for any plant, pest, pesticide, and spray equipment combination.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41958362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fermented soybean meal in broiler diets exposed to stress induced by corticosterone: Effect on growth performance, gut health and immune response 皮质酮应激下发酵豆粕对肉鸡生长性能、肠道健康和免疫反应的影响

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-07-31 DOI: 10.5424/sjar/2023213-18995

F. Abeddargahi, H. DARMANI-KUHI, Mohammad ROOSTAIE-ALIMEHR, Seyed H. HOSSEINI-MOGHADDAM, Reza HASSAN-SAJEDI, Anahid Hosseini, F. Mohammadpour

{"title":"Fermented soybean meal in broiler diets exposed to stress induced by corticosterone: Effect on growth performance, gut health and immune response","authors":"F. Abeddargahi, H. DARMANI-KUHI, Mohammad ROOSTAIE-ALIMEHR, Seyed H. HOSSEINI-MOGHADDAM, Reza HASSAN-SAJEDI, Anahid Hosseini, F. Mohammadpour","doi":"10.5424/sjar/2023213-18995","DOIUrl":"https://doi.org/10.5424/sjar/2023213-18995","url":null,"abstract":"Aim of study: To investigate the effect of fermented soybean meal (FSBM) on responses of broiler chickens exposed to stress condition. \u0000Material and methods: Two hundred and eighty-eight day-old male chickens were allocated to six treatments in a 2 × 3 completely randomized factorial design involving two factors: factor 1 was the subcutaneous injections of CORT or corn oil (as control) at 2 mg/kg body weight twice per day during 3 days; and factor 2 were 3 levels (0, 10 and 20%) of FSBM in replacement of the original soybean meal. \u0000Main results: The replacement of soybean meal by FSBM increased FI and BWG without any significant effect on FCR (10 days), while FCR was increased significantly by CORT injection. Corticosterone injection caused a significant decrease in the ratio of villus height (VH) to crypt depth (CD) in the duodenum and jejunum. The height of villi in the duodenum increased significantly at 20% FSBM replacement. The antibody titers against Newcastle disease (28 and 2 day), coliform count (28 day) and activity of digestive enzymes (10 day) were not affected by either FSBM replacement or CORT injections. Corticosterone injection significantly increased tall-like receptor-4 (TLR4) and immunoglobulin A (IgA) expression, while decreased heat shock protein-70 (HSP70) expression. FSBM replacement down-regulated the expression of TLR4, HSP70, and IgA in small intestine compared to the control group. In stress condition induced by CORT injection, 10% FSBM replacement decreased HSP70 and IgA expression in the jejunum and ileum, while had no effects on TLR4. \u0000Research highlights: Partial replacement of soybean meal by FSBM in diets had positive effects on performance, intestinal morphology and immune response in chicks exposed to stress.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41695960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of feeding restrictions on development of juvenile cobias, Rachycentron canadum 摄食限制对大菱鲆幼鱼发育的影响

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-07-27 DOI: 10.5424/sjar/2023213-20244

A. B. Souza, J. Motta, M. Polese, H. Lavander, L. Glória, L. S. Silveira, M. V. Vidal Junior

{"title":"Effect of feeding restrictions on development of juvenile cobias, Rachycentron canadum","authors":"A. B. Souza, J. Motta, M. Polese, H. Lavander, L. Glória, L. S. Silveira, M. V. Vidal Junior","doi":"10.5424/sjar/2023213-20244","DOIUrl":"https://doi.org/10.5424/sjar/2023213-20244","url":null,"abstract":"Aim of study: A 45-day trial was conducted to evaluate fasting as a possible way of food strategy during production of juvenile cobias (Rachycentron canadum). \u0000Area of study: The study was conducted in the State of Espírito Santo, Brazil. \u0000Material and methods: The following different protocols were used to organize their feeding: C, fish fed to satiety twice a day for 45 days; U1, fish fed to satiety twice a day on alternate days; U2, fish fed to satiety twice daily for five consecutive days, followed by two days of food deprivation, cyclically; U5, fish subjected to food deprivation for five days and then fed to satiety twice a day for 40 days; U10, fish subjected to food deprivation for ten days and then fed to satiety twice a day for 35 days; and U15, fish subjected to food deprivation for fifteen days and then fed to satiety twice a day for 30 days. \u0000Main results: No mortality was observed during the trial period. The different feeding protocols significantly affected juvenile cobias development and wellbeing. The final weight (g) of cobia juveniles was C – 91.9 ± 9.1; U1 – 75.0 ± 11.2; U2 – 72.2 ± 6.0; U5 – 70.3 ± 6.1; U10 – 63.4 ± 4.6; U15 – 54.4 ± 4.7. No compensatory growth was observed during the entire experimental period. \u0000Research highlights: Continuous fasting had a more severe effect than intermittent fasting. Significantly greater hepatocyte counts were correlated with longer fasting periods. Fasting protocols should not be recommended for juvenile cobias.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42122987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of green seaweed meal blend on feed quality and zootechnical performance in shrimp (Penaeus vannamei) juveniles 青藻粉混合对凡纳滨对虾幼虾饲料品质和动物技术性能的影响

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-07-27 DOI: 10.5424/sjar/2023213-19901

Jessie VARGAS-CÁRDENAS, L. O. Brito, S. M. B. C. Silva, Ivan SOTO-RODRÍGUEZ, A. Gálvez

{"title":"Effect of green seaweed meal blend on feed quality and zootechnical performance in shrimp (Penaeus vannamei) juveniles","authors":"Jessie VARGAS-CÁRDENAS, L. O. Brito, S. M. B. C. Silva, Ivan SOTO-RODRÍGUEZ, A. Gálvez","doi":"10.5424/sjar/2023213-19901","DOIUrl":"https://doi.org/10.5424/sjar/2023213-19901","url":null,"abstract":"Aim of study: To evaluate a green seaweed meal in the diets of Penaeus vannamei juveniles, comprising Ulva spp., Caulerpa spp. and Enteromorpha spp. as a feed blend at inclusion levels at 4% and 8%. \u0000Area of study: Universidad Nacional Agraria La Molina, Lima, Perú. \u0000Material and methods: Analyses were conducted to determine the pellet quality through percentages of dry matter retention (DMR), protein loss and water absorption capacity; and to evaluate the effect of this seaweed meal in the digestibility and zootechnical shrimp performance. Three treatments (diets) were formulated to contain 0% (control diet), 4% (M4) and 8% (M8 of green seaweed meals (blend)), in isonitrogenous (crude protein; 300 g kg-1) and isocaloric (3.3 Mcal kg-1) diets. The shrimps were reared at a density of 286 juveniles m-3 for 29 days in a recirculating aquaculture system (RAS). \u0000Main results: Among the diets, M4 had the highest DMR value (97.06%), whereas M8 had highest water absorption capacity (185.48%) with lower % of protein loss between the treatments diets. No differences were observed in the zootechnical performance, except for survival (p<0.05), with the M8 diet having highest mortality rate (44.4%) between the treatments diets. \u0000Research highlights: Incorporating 4% green seaweed meal in shrimp feed supported adequate growth and survival of juvenile P. vannamei with adequate DMR values, water absorption capacity, protein loss and high apparent dry matter digestibility and apparent digestibility of the reference diet.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49004192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leaf chlorophyll contents in some European pear cultivars grafted on different rootstocks and its relation with growth and yield 不同砧木嫁接欧洲梨品种叶片叶绿素含量及其与生长和产量的关系

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-07-25 DOI: 10.5424/sjar/2023213-20255

Z. Faizi, A. Ozturk, Izhar Ullah

{"title":"Leaf chlorophyll contents in some European pear cultivars grafted on different rootstocks and its relation with growth and yield","authors":"Z. Faizi, A. Ozturk, Izhar Ullah","doi":"10.5424/sjar/2023213-20255","DOIUrl":"https://doi.org/10.5424/sjar/2023213-20255","url":null,"abstract":"Aim of study: To investigate the effect of different combinations of pear rootstocks and cultivars on the contents of leaf photosynthetic pigments and their relation with some growth and yield characteristics. \u0000Area of study: Ondokuz Mayis University, Samsun, Türkiye, in two years, 2021 and 2022. \u0000Material and methods: The pear cultivars ‘Santa Maria’, ‘Williams’, and ‘Deveci’ were grafted on eight rootstocks: two quince clonal rootstocks (BA29 and QA), five pear clonal rootstocks (FOX9, FOX11, OH×F333, OH×F87, FAROLD40) and Pyrus communis L. seedlings. Growth and yield attributes were calculated and chlorophyll and carotenoid contents were determined by the spectrophotometric method, using 99.8% methanol solvent for chlorophyll (chl) extraction. \u0000Main results: Chl a/b in the case of rootstocks, chl a and total carotenoids in the cultivars were found statistically significant; the ratio chl a/b ranged 1.71-2.30 in the case of rootstocks; in the case of cultivars chl a ranged from 17.77 (cv. ‘Santa Maria’) to 19.88 (cv. ‘Deveci’) μg mL-1, and carotenoids ranged 0.21-0.95 μg mL-1. Under the main impact of cultivars, rootstocks and their combinations, a significant difference was seen in the growth and yield attributes. \u0000Research highlights: A negative correlation coefficient was observed between photosynthetic pigments and morphological characteristics; however, the correlation coefficient was positive for canopy volume and annual shoot growth. Canopy management, especially with the use of rootstocks and cultivars that result in weaker growth, is helpful for improving chlorophyll content and yield performances.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41532090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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