Revista Ciencia Agronomica最新文献_第3页

FEM modal analysis of a garlic harvester for varying geomorphologies 不同地貌条件下大蒜收割机的有限元模态分析

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-06-30 DOI: 10.5935/1806-6690.20230040

E. Ojeda, Â. V. Reis, Fabrício Ardais Medeiros, Leomar Santos Marques, R. L. T. Machado, R. Magalhães, Gianna de la Tinidad Saavedra, M. Zanchin

{"title":"FEM modal analysis of a garlic harvester for varying geomorphologies","authors":"E. Ojeda, Â. V. Reis, Fabrício Ardais Medeiros, Leomar Santos Marques, R. L. T. Machado, R. Magalhães, Gianna de la Tinidad Saavedra, M. Zanchin","doi":"10.5935/1806-6690.20230040","DOIUrl":"https://doi.org/10.5935/1806-6690.20230040","url":null,"abstract":"- In family farming, mechanisation, when appropriate to the task and to the size of the property, can be one way of easing tiring and repetitive work, such as garlic harvesting. The present study is based on a model of harvester currently on the market, and proposes several improvements for mechanising the harvest on family farms, with an emphasis on sloping terrain, to reduce costs and increase productivity. Since the equipment currently on the market reduces the operational performance of these producers resulting in the high prices of commercial garlic, the aim of this study was to evaluate, using the Finite Element Method, the von Mises stresses and the displacement of a garlic harvester in di ﬀ erent topographies. A structural analysis was carried out, and the vibration modules in the three main parts that make up the structure of the garlic harvester were checked: the structure supporting the scari ﬁ er point, the structure of the plant transport system, and the structure at the rear of the harvester. The structural modi ﬁ cations that were implemented corrected the initial high-stress conditions, showing improvements in stress concentration and areas of displacement. As such, the entire structure of the garlic harvester tends to withstand the proposed loads. From the results of the simulations, we conclude that the connecting support may undergo greater response from structural dynamics, and that frequencies greater than 45.7 Hz should be avoided since there are several natural frequencies above this range that might cause interference to the structure.","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71158053","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

Phosphorus extractants for soils in the humid tropical region of Brazil 巴西潮湿热带地区土壤磷萃取剂

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-06-30 DOI: 10.5935/1806-6690.20230042

Carlos Henrique Lima de Matos, V. Melo, S. Uchôa, Raimundo de Almeida Pereira, Pedro Paulo Ramos Ribeiro Nascimento

{"title":"Phosphorus extractants for soils in the humid tropical region of Brazil","authors":"Carlos Henrique Lima de Matos, V. Melo, S. Uchôa, Raimundo de Almeida Pereira, Pedro Paulo Ramos Ribeiro Nascimento","doi":"10.5935/1806-6690.20230042","DOIUrl":"https://doi.org/10.5935/1806-6690.20230042","url":null,"abstract":"- Given the heterogeneity of soils in Roraima state, Brazil, and the need for a phosphorus (P) extraction protocol, this study aimed to assess the efficiency of the Mehlich-1, Mehlich-3, Bray-1 extractants and anion exchange resin (AER) in determining available P in soils representative of the state. The chemical, physical and mineralogical attributes of seven soil classes were determined. The experiment was conducted in a greenhouse, using a randomized block design in a 7 x 5 factorial scheme with four repetitions. The first factor was the soils (LA (ITÃ), LV (ITÃ), LA (SERRA DA PRATA), LA (CCA), PA (CCA), FT (BONFIM), SN (SURUMU)), and the second P doses, estimated based on the maximum P-adsorption capacity (MPAC). A polyethylene pot containing 5 dm 3 of soil and five plants was defined as the experimental unit. The indicator species was corn grown in two 30-day phases. The P doses were applied using monopotassium phosphate. Soil samples were removed before planting to determine available P using the extractants. Corn dry weight was assessed at the end of the two-phase experiment. Correlation tests were performed for dry weight versus extractant and extractant versus extractant. The Mehlich-3 and Bray-1 extractants were the most sensitive to variations in soil attributes. The resin exhibited the greatest correlations with the different soils individually and combined, showing potential in determining available P in soils from the humid tropical region of the Brazilian Amazon.","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71158154","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

Indirect selection for culinary quality and minerals in beans based on genotype × environment interaction 基于基因型-环境互作的豆类烹饪品质和矿物质的间接选择

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-06-30 DOI: 10.5935/1806-6690.20230044

N. D. Ribeiro, S. M. Maziero

{"title":"Indirect selection for culinary quality and minerals in beans based on genotype × environment interaction","authors":"N. D. Ribeiro, S. M. Maziero","doi":"10.5935/1806-6690.20230044","DOIUrl":"https://doi.org/10.5935/1806-6690.20230044","url":null,"abstract":"- The determination of the number of experiments required to achieve high coincidence in identifying signi ﬁ cant correlations between culinary quality traits and/or mineral concentrations is unprecedented for common bean. The objectives of this study were to evaluate correlations between culinary quality traits and minerals in common bean lines considering data from individual and combined experiments; de ﬁ ne the minimum number of experiments that provide high coincidence in identifying signi ﬁ cant correlations; and identify promising traits for indirect selection. For this, seven traits related to culinary quality and the concentration of six minerals in grains of 17 common bean genotypes were evaluated. Pearson’s linear correlation analysis was performed on data obtained from four individual experiments and six combinations of experiments. Twelve of the 13 evaluated traits showed a signi ﬁ cant genotype × environment interaction e ﬀ ect, indicating that the common bean genotypes exhibited di ﬀ erences in culinary quality and mineral concentration when these were determined in di ﬀ erent experiments. Pearson’s linear correlation coe ﬃ cients vary in signi ﬁ cance, sign, and/or magnitude for the traits analyzed in individual and combined experiments. The use of data from three experiments provides a high coincidence percentage in identifying signi ﬁ cant correlations in Pearson’s linear correlation analysis. Common bean lines with high culinary quality and greater mineral concentration can be indirectly selected based on higher L* values (grain lightness) and higher calcium concentrations.","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71158716","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

Qualitative vulnerability of the waters of a surface reservoir subjected to drought in a tropical semi-arid region 热带半干旱地区受干旱影响的地表水库水的质量脆弱性

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-05-08 DOI: 10.5935/1806-6690.20230033

Janaina Castro de Mendonça, F. B. Lopes, E. M. Andrade, Carine Fernandes Praxedes, Francisco Josivan DE Oliveira Lima, Fernanda Helena Oliveira da Silva

{"title":"Qualitative vulnerability of the waters of a surface reservoir subjected to drought in a tropical semi-arid region","authors":"Janaina Castro de Mendonça, F. B. Lopes, E. M. Andrade, Carine Fernandes Praxedes, Francisco Josivan DE Oliveira Lima, Fernanda Helena Oliveira da Silva","doi":"10.5935/1806-6690.20230033","DOIUrl":"https://doi.org/10.5935/1806-6690.20230033","url":null,"abstract":"ABST RACT - Irregular rainfall and the occurrence of droughts in tropical semi-arid regions have a negative impact on the quality and availability of water stored in reservoirs. The aim of this study was to evaluate the quality of water stored in an arti ﬁ cial reservoir in the tropical semi-arid region of Brazil during years of drought. The study area was the Pereira de Miranda reservoir, located in the district of Pentecoste, Ceará, Brazil. Seven water-sampling campaigns were carried out between April 2015 and September 2016. The variables to be analysed were chlorophyll-a (Cl-a), hydrogen potential (pH), electrical conductivity (EC), total nitrogen (N total ), total phosphorus (P total ), transparency (SD), ﬁ xed/volatile/total suspended solids (FSS/VSS/TSS), and temperature (T 0 ); the trophic state index (TSI) was then calculated. The variables which better explained the variance in water quality were identi ﬁ ed by principal component analysis (PCA). The waters of the Pereira de Miranda reservoir were classi ﬁ ed as hyper-eutrophic throughout the study period and at each of the collection points. The PCA identi ﬁ ed that the variability in water quality was determined by suspended sediment and nutrients, showing that the reduction in variables made it possible to obtain high explainability of the conditions of the reservoir during monitoring, saving time and resources on the analyses. In addition, the occurrence of severe drought resulted in low accumulated volumes, which intensi ﬁ ed and made vulnerable the quality of the waters. As such, the Pereira de Miranda reservoir proved to be in a process of degradation, mainly due to anthropogenic action, intensi ﬁ ed by climate factors","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71157590","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

Morphophysiological and biochemical changes in Enterolobium contortisiliquum seedlings under abiotic stresses 非生物胁迫下弯曲肠苗形态生理生化变化

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-05-08 DOI: 10.5935/1806-6690.20230037

A. D. Ferreira, C. Leal, M. Leite, Clarisse Pereira Benedito, A. S. Dutra, C. Z. Alves, E.R.C. de Morais, M. D. Pereira, M. Porceddu, G. Bacchetta, S. B. Torres

{"title":"Morphophysiological and biochemical changes in Enterolobium contortisiliquum seedlings under abiotic stresses","authors":"A. D. Ferreira, C. Leal, M. Leite, Clarisse Pereira Benedito, A. S. Dutra, C. Z. Alves, E.R.C. de Morais, M. D. Pereira, M. Porceddu, G. Bacchetta, S. B. Torres","doi":"10.5935/1806-6690.20230037","DOIUrl":"https://doi.org/10.5935/1806-6690.20230037","url":null,"abstract":"- Among the main problems that compromise the development of forest species are water and salt stresses, especially in the early stages of development, when seedlings are more sensitive. Thus, the objective of this study was to evaluate the morphophysiological and biochemical changes in Enterolobium contortisiliquum seedlings subjected to abiotic stresses. The experimental design was randomized complete blocks (RCB), composed of ﬁ ve treatments, with four replicates, and the experimental plot consisted of twenty plants. From the 31 st day after sowing, when the seedlings reached approximately 15 cm in height, they began to receive the treatments, which consisted of different levels of electrical conductivity of irrigation water (0.3; 2; 4; 6; 8 dS m -1 ) for salt stress and periods of water restriction (0; 4; 8; 12 and 16 days without irrigation) for water stress. The traits evaluated were: plant height, root length, stem diameter, number of leaves, leaf area, total dry matter, Dickson quality index, height/shoot dry matter ratio, total soluble sugars, starch, total amino acids and proline. An increase in the electrical conductivity of irrigation water and days without irrigation compromised the development of E. contortisiliquum seedlings, which was intensified from 2 dS m -1 and four days without irrigation for salt and water stresses, respectively. The mechanism of survival of E. contortisiliquum to abiotic stresses involves reduction in the growth and quality of seedlings, with activation of biochemical defense mechanisms of the species.","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71157866","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

The use of numerical modelling to assess soil water dynamics in subsurface irrigation 利用数值模拟评估地下灌溉中土壤水分动态

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-05-08 DOI: 10.5935/1806-6690.20230034

Maya Rocha, A. Teixeira, F. C. D. Silva Filho, R. Gondim, A. B. O. D. Sousa

{"title":"The use of numerical modelling to assess soil water dynamics in subsurface irrigation","authors":"Maya Rocha, A. Teixeira, F. C. D. Silva Filho, R. Gondim, A. B. O. D. Sousa","doi":"10.5935/1806-6690.20230034","DOIUrl":"https://doi.org/10.5935/1806-6690.20230034","url":null,"abstract":"- Knowledge of soil water dynamics is essential for establishing appropriate methods of irrigation management. Water dynamics in unsaturated soils is a complex process that can be explained by the Richards equation. As this is a non-linear differential equation, there is no analytical solution, but requires the use of the ﬁ nite element method, for example, to obtain solutions, where simulations using numerical modelling make it p ossible to predict the the ﬂ ow of water from the soil. As such, the aim of this study was to evaluate a 2D numerical model in simulating wate r distribution and wet bulb formation resulting from a subsurface irrigation system, in addition to validating the generated model. The Pearson correlation coef ﬁ cient (r), the coef ﬁ cient of deter mination (R 2 ) and the root-mean-square error (RMSE) were calculated. For each treatment, both during and after irrigation, the model showed a small relative error, high values for R 2 and a positive correlation with the ﬁ eld data. It was concluded that the model is applicable to the design and management of subsurface irrigation systems, varying the installation depth of the drip tube, the spacing between emitters and the soil moisture, giving good results for the various simulated scenarios.","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71157786","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: 1

Gas exchange in forage cactus cultivars of genera Opuntia and Nopalea (Cactaceae) 仙人掌科仙人掌属和仙人掌属牧草品种气体交换的研究

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-05-08 DOI: 10.5935/1806-6690.20230035

Ronimeire Torres da Silva, F. Figueiredo, Maria de Fátima de Queiroz Lopes, R. Bruno, A. P. Andrade

{"title":"Gas exchange in forage cactus cultivars of genera Opuntia and Nopalea (Cactaceae)","authors":"Ronimeire Torres da Silva, F. Figueiredo, Maria de Fátima de Queiroz Lopes, R. Bruno, A. P. Andrade","doi":"10.5935/1806-6690.20230035","DOIUrl":"https://doi.org/10.5935/1806-6690.20230035","url":null,"abstract":"- Forage cactus species are cultivated in northeaster Brazil for feed, mainly during dry periods, as cacti are xerophytes well adapted to drought. Gas exchange studies have elucidated the physiological mechanisms underlying plant adaptation to ecosystems with low water availability. Here, we evaluated the variability between and within cactus forage genera Opuntia and Nopalea with respect to gas exchange behaviour. Twenty-one cultivars were used, 16 of which belonged to genus Opuntia , while six belonged to genus Nopalea , particularly, O. cochenillifera . Gas exchange was evaluated in the secondary cladode at 00:00 hours using a portable infrared gas analyser. Net CO 2 assimilation rate, stomatal conductance, CO 2 intercellular concentration, transpiration rate, and leaf temperature were evaluated. Additionally, instantaneous water use efficiency, intrinsic water use efficiency, and instantaneous carboxylation efficiency were calculated. Boxplots were used to assess value dispersion between the genera prior to submitting the data to multivariate analysis of principal components and cultivar-based grouping, and subsequently organizing the species studied in a dendrogram. Variability between the two genera and among cactus forage cultivars was detected for gas exchange. Cultivars were classified into three groups and two main components were identified. Cultivars ‘Verdura’ and ‘Orelha de Elefante Mexicana’ showed higher photosynthetic performance.","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71157798","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

Genetic parameters of morpho-agronomic and physiological traits of crambe genotypes under drought conditions 干旱条件下crambe基因型形态农艺性状和生理性状的遗传参数

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-05-08 DOI: 10.5935/1806-6690.20230036

L. B. D. C. Rosmaninho, L. Dias, C. Benjamin, M. F. D. Silva

{"title":"Genetic parameters of morpho-agronomic and physiological traits of crambe genotypes under drought conditions","authors":"L. B. D. C. Rosmaninho, L. Dias, C. Benjamin, M. F. D. Silva","doi":"10.5935/1806-6690.20230036","DOIUrl":"https://doi.org/10.5935/1806-6690.20230036","url":null,"abstract":"- This work aims at evaluating and discriminating crambe genotypes regarding tolerance to water de ﬁ cit by means of morpho-agronomic and physiological traits. The trial was carried out in a greenhouse under a randomized complete block design with four blocks, in a 2 x 8 factorial scheme, being two environments (with and without stress) and eight genotypes (FMS CR 1101, FMS CR 1106, FMS CR 1203, FMS CR 1305, FMS CR 1307, FMS CR 1312 and FMS CR 1326 and cultivar FMS Brilhante). The genotypes were evaluated according to physiological and morpho-agronomic traits. The signi ﬁ cance of the mean squares was tested by the F test (P < 0.05) and the genetic parameters were estimated as ratio b between the genetic (CVg) and experimental (CVe) coef ﬁ cients of variation, broad-sense heritability at genotypic mean level ( 2 ˆ m h ), intraclass correlation (r) and selective accuracy (Ac). In general, water de ﬁ cit did not cause severe physiological limitations to the plants. Plant height (PH), total dry mass (TDM) and grain yield (GY) were the traits that stood out for presenting the highest estimates of ratio b, 2 ˆ m h , CVg and r, revealing the possibility of genetic gains with the selection. Nevertheless, after evaluating the performance of genotypes in terms of physiological and morpho-agronomic traits, it was concluded that cultivar FMS Brilhante and inbred lines FMS CR 1326 and FMS CR 1106 had the most favorable traits for the selection, therefore, presenting potential for water de ﬁ cit tolerance","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71157810","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

Nesting and foraging behaviour of the solitary bee Epanthidium tigrinum (Schrottky, 1905) bred in trap nests 在陷阱巢中饲养的独居蜜蜂Epanthidium tigrinum (Schrottky, 1905)筑巢和觅食行为

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-04-14 DOI: 10.5935/1806-6690.20230031

Vitória Inna Mary de Sousa Muniz, L. F. D. Santos, Pedro de Assis de Oliveira, David Rezende da Silveira, B. Freitas

{"title":"Nesting and foraging behaviour of the solitary bee Epanthidium tigrinum (Schrottky, 1905) bred in trap nests","authors":"Vitória Inna Mary de Sousa Muniz, L. F. D. Santos, Pedro de Assis de Oliveira, David Rezende da Silveira, B. Freitas","doi":"10.5935/1806-6690.20230031","DOIUrl":"https://doi.org/10.5935/1806-6690.20230031","url":null,"abstract":"- The bee Epanthidium tigrinum is native to Brazil and shows potential for use in pollinating agricultural crops. However, the little information available concerning its reproductive and feeding habits has prevented any rational breeding or management of these bees. The aim of this study was to investigate their acceptance of trap nests, and their nesting and foraging behaviour, with a view to understanding the potential of the species for rational breeding. Trap nests were offered, and the females were observed for 16 months to monitor the establishment, building and closing of nests, as well as their architecture and the behaviour of the bees when searching for the resources used to build and provision the nests. The results showed that E. tigrinum performs well in trap nests; prefers cavities with a diameter of around 0.45 cm; depends on other plant resources besides pollen and nectar, such as leaves, ﬁ bres and resins, to build its nest; and remains active throughout the year. The study concluded that the species has the potential for use in agricultural pollination programs; however the observed nesting requirements must be taken into account, both in conservation efforts and in zootechnical exploitation when breeding the bee for agricultural pollination, as both can in ﬂ uence the number of constructed nests and cells, and consequently, the size of the pollinator population.","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71157933","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

Physiological responses of sugar-apple seedlings under saline wastewater irrigation and NPK doses 盐碱水灌溉和氮磷钾对苹果幼苗生理响应的影响

IF 0.8 4区农林科学

Revista Ciencia Agronomica Pub Date : 2023-04-14 DOI: 10.5935/1806-6690.20230029

A. A. T. Souza, V. Mendonça, E. P. Paiva, K. T. O. Pereira, K. D. S. L. Reges, R. Moreira, P. Fernandes, F. Sá

{"title":"Physiological responses of sugar-apple seedlings under saline wastewater irrigation and NPK doses","authors":"A. A. T. Souza, V. Mendonça, E. P. Paiva, K. T. O. Pereira, K. D. S. L. Reges, R. Moreira, P. Fernandes, F. Sá","doi":"10.5935/1806-6690.20230029","DOIUrl":"https://doi.org/10.5935/1806-6690.20230029","url":null,"abstract":"- Salt stress stands out as one of the main limiting factors in agricultural production in arid and semi-arid regions, due to its osmotic and ionic effects on plants. In this context, the objective was to evaluate the physiological responses of sugar-apple seedlings irrigated with saline wastewater under different doses of NPK. The experiment was carried out in a greenhouse, in a randomized block design, in a 3 x 5 factorial scheme, with four replicates. Three irrigation waters were tested: local-supply water (control), reject brine and fish farming effluent, and five doses of NPK, referring to the proportions of 25, 50, 75, 100, and 125% of the N:P:K fertilizer recommendation of 100:300:150 mg dm -3 . Seedlings were cultivated in 2-dm 3 containers ﬁ lled with sandy soil for 90 days after sowing. At the end of this period, gas exchange, chlorophyll ﬂ uorescence, and biomass accumulation were evaluated. The use of reject brine and ﬁ sh farming ef ﬂ uent to irrigate sugar-apple seedlings reduced photosynthetic activity and biomass accumulation. The best physiological responses and biomass accumulation occur at NPK doses of 75% (75:225:112.5 mg dm -3 of N:P:K) for seedlings irrigated with local-supply water, 60% (60:180: 90 mg dm -3 of N:P:K) for seedlings irrigated with reject brine, and 40% (40:120:60 mg dm -3 of N:P:K) for seedlings irrigated with ﬁ sh farming ef ﬂ uent.","PeriodicalId":21359,"journal":{"name":"Revista Ciencia Agronomica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71157978","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