Tropical Grasslands-Forrajes Tropicales最新文献_第2页

Herbage yield and quality of 12 Urochloa cultivars and lines in Northeast Thailand 泰国东北部12个Urochloa品种和品系的牧草产量和品质

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-05-31 DOI: 10.17138/tgft(11)121-130

M. Hare

{"title":"Herbage yield and quality of 12 Urochloa cultivars and lines in Northeast Thailand","authors":"M. Hare","doi":"10.17138/tgft(11)121-130","DOIUrl":"https://doi.org/10.17138/tgft(11)121-130","url":null,"abstract":"Forage accumulation yields and nutritive value of 12 Urochloa cultivars and pre-commercial lines (Mulato II, Cayman, Cobra, Marandu, Toledo, BRS Piatã, BRS Paiaguás, Ruzi, Humidicola, BRO4/3025, BRO4/3207 and BRO4/2515) were evaluated in a field trial in Northeast Thailand during 2015–2018. Total herbage yields for cultivars and lines over 3 years ranged from 15,800 kg DM/ha (Ruzi) to 33,800 kg DM/ha (Toledo). Toledo produced the highest total biomass across the 3 wet and dry seasons. BRS Piatã and BRS Paiaguás showed good performance, out-yielding Ruzi and Mulato II in total DM in both wet and dry seasons. The 6 hybrid Urochloa cultivars/lines (Mulato II, Cayman, Cobra, BRO4/3025, BRO4/3207 and BRO4/2515) all accumulated similar total DM yields over 3 years, outyielding Ruzi (P<0.05). Crude protein concentrations in forage were higher (P<0.05) in the dry season than wet season and in leaf than stem. In the second and third dry seasons, Ruzi had higher CP concentrations in both leaf and stem than all other cultivars and lines. ADF and NDF concentrations were lower in the dry season than the wet season. This trial has shown that BRS Piatá and BRS Paiaguãs would be ideal replacements for Mulato II and Ruzi in Northeast Thailand because of their superior dry season production for smallholder farmers for either cut-and-carry forage or grazing.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46984414","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

Nutritional and biomass evaluation of a Megathyrsus maximus collection in a dry tropical climate in Colombia 哥伦比亚热带干旱气候下大菱鲆种群的营养和生物量评估

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)11-21

J. Carvajal-Tapia, R. Barahona-Rosales, J. Castro-Montoya, J. Arango, N. Vivas-Quila

引用次数: 0

Efecto de diferentes niveles de cobertura vegetal en la germinación, sobrevivencia y establecimiento de Tithonia diversifolia (Hemsl.) A. Gray. vc ICACUBA Oc-10 sembrada con semilla gámica. 不同植被覆盖水平对多样化泰索尼亚萌发、存活和建立的影响。a . Gray。vc ICACUBA Oc-10播种胶质种子。

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)31-40

César Padilla, I. Rodríguez, Tomás E. Ruíz, Yolaine Mesa, Nadia Quiñones

{"title":"Efecto de diferentes niveles de cobertura vegetal en la germinación, sobrevivencia y establecimiento de Tithonia diversifolia (Hemsl.) A. Gray. vc ICACUBA Oc-10 sembrada con semilla gámica.","authors":"César Padilla, I. Rodríguez, Tomás E. Ruíz, Yolaine Mesa, Nadia Quiñones","doi":"10.17138/tgft(11)31-40","DOIUrl":"https://doi.org/10.17138/tgft(11)31-40","url":null,"abstract":"Se estudiaron niveles de cobertura vegetal en la germinación, sobrevivencia y establecimiento por semilla gámica de tithonia. Se usó un diseño de bloques al azar con 5 réplicas. Los tratamientos consistieron en cubrir las semillas con 0, 0.250, 0.338 y 0.500 kg/m2 de cobertura vegetal. A los 12, 34, 54 y 78 días después de la siembra el porcentaje de germinación, número de hijos y hojas/planta, altura, diámetro del tallo fueron significativamente superiores cuando se aplicó cobertura vegetal con relación al control. La germinación se incrementó hasta un 29 % con el nivel de 0.500 kg/ m2 de cobertura vegetal y fue menor (p<0.05) en el control. El rendimiento 6.43–10.87 t MS/ha en el primer corte se incrementó significativamente con los niveles de cobertura vegetal. En el tercero, los mejores (p<0.05) rendimientos 5.6–6.0 t MS/ha se lograron con 0.338 y 0.500 kg/m2 de cobertura vegetal. Se concluye que es necesario cubrir la semilla con cobertura vegetal de residuos vegetales a razón de 0.338–0.500 kg/m2 para asegurar la germinación, supervivencia y desarrollo de las plantas e incrementar la producción de biomasa.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44545938","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 irrigation on biomass production and components of dallis grass (Paspalum dilatatum) and Bahia grass (P. notatum) in Uruguay 灌溉对乌拉圭达丽草(Paspalum dilatatum)和巴伊亚草(P. notatum)生物量产量和成分的影响

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)22-30

F. Casalás, P. Speranza, M. Cadenazzi, R. Zanoniani, L. Giménez, P. Boggiano

引用次数: 0

Análisis económico de la producción de semilla gámica de Tithonia diversifolia (Hemsl.) Gray en Cuba 多样化泰索尼亚(Tithonia diversifolia)胶质种子生产的经济分析古巴的灰色

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)75-82

Nadia Báez Quiñones, César Padilla, Idalmis Rodríguez García, Tomás E. Ruíz

{"title":"Análisis económico de la producción de semilla gámica de Tithonia diversifolia (Hemsl.) Gray en Cuba","authors":"Nadia Báez Quiñones, César Padilla, Idalmis Rodríguez García, Tomás E. Ruíz","doi":"10.17138/tgft(11)75-82","DOIUrl":"https://doi.org/10.17138/tgft(11)75-82","url":null,"abstract":"La Tithonia diversifolia es una de las plantas proteicas más aceptada por los ganaderos en Cuba para alimentar a los animales. Encontrar una alternativa económica para fomentar sistemas de producción con esta planta es vital para disminuir los costos asociados a la plantación e indirectamente en la alimentación, por lo que el objetivo de este trabajo fue determinar qué método de propagación (por semilla vegetativa o gámica) de tithonia resulta económicamente más factible para la producción de semilla gámica en las condiciones de Cuba. Se determinaron las fichas de costo de la producción de semilla gámica de tithonia a partir de plantaciones por vía asexual. Luego, a partir de este valor se determinó el costo de producción de la semilla gámica sembrada por vía sexual. El costo de producción de la semilla gámica fue de 15.07 USD/kg cuando se sembró con material vegetativo, y de 11.04 USD/kg cuando se usó semilla gámica. Se demuestra que el costo de establecimiento de una hectárea de tithonia para la producción de semillas se reduce hasta 3 veces cuando se parte del uso de semilla gámica, comparado al uso de semilla vegetativa (US$ 142.13 vs 472.05, respectivamente).","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48990809","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

Dinámica de tallos e índice de estabilidad en cinco cultivares de Urochloa en condiciones semiáridas 半干旱条件下5个乌洛克洛亚品种茎段动态和稳定性指标

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)1-10

Fernando Lucio Ruiz, Santiago Joaquin Cancino, Jonathan Rául Garay Martínez, Yuridia Bautista Martínez, Benigno Estrada Drouaillet, Andrés Gilberto Limas Martínez

{"title":"Dinámica de tallos e índice de estabilidad en cinco cultivares de Urochloa en condiciones semiáridas","authors":"Fernando Lucio Ruiz, Santiago Joaquin Cancino, Jonathan Rául Garay Martínez, Yuridia Bautista Martínez, Benigno Estrada Drouaillet, Andrés Gilberto Limas Martínez","doi":"10.17138/tgft(11)1-10","DOIUrl":"https://doi.org/10.17138/tgft(11)1-10","url":null,"abstract":"El objetivo de esta investigación fue evaluar los efectos de la temperatura y precipitación sobre la dinámica de tallos y el índice de estabilidad en cinco cultivares del género Urochloa en condiciones semiáridas. Los cultivares evaluados fueron Camello I, Camello II, Mulato II, Convert 330 y Cobra, en un diseño completamente al azar con seis repeticiones. La temperatura y precipitación presentes durante el periodo de evaluación estimularon el comportamiento de la dinámica de tallos (P<0.05). Los cultivares Cobra y Mulato II presentaron las mayores densidades de tallos (> 4,000 tallos/m2 en promedio), como respuesta al mayor número de hijuelos (769 y 718/m2, respectivamente), aún con una mortalidad de tallos relativamente alta (336 y 449 tallos/m2, respectivamente). El tener los valores máximos de unidades calor acumulados en períodos con poca o nula precipitación, comprometió el índice de estabilidad de la pradera (con valores menores a 1). El corte en el periodo de heladas (noviembre) provocó el incremento del 20 % en la tasa de mortalidad y, por consiguiente, una disminución en el índice de estabilidad de hasta 0.83. Las condiciones ambientales y el crecimiento ininterrumpido en los cultivares de Urochloa, provoca la pérdida en la estabilidad de la pradera, debido a la menor tasa de ahijamiento con respecto a la tasa de mortalidad de tallos.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43980085","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: 2

Establishment yield and nutrient composition of four legumes as influenced by age of growth in a cool tropical climate at Jos, Plateau State, Nigeria 在尼日利亚高原州乔斯凉爽的热带气候中，四种豆科植物的产量和营养成分受生长年龄的影响

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)83-94

T. T. Akpensuen, Otsanjugu Aku Timothy Namo

{"title":"Establishment yield and nutrient composition of four legumes as influenced by age of growth in a cool tropical climate at Jos, Plateau State, Nigeria","authors":"T. T. Akpensuen, Otsanjugu Aku Timothy Namo","doi":"10.17138/tgft(11)83-94","DOIUrl":"https://doi.org/10.17138/tgft(11)83-94","url":null,"abstract":"An experiment was conducted with 2 temperate (Trifolium pratense and T. repens) and 2 tropical (Stylosanthes guianensis and Centrosema molle syn. C. pubescens) forage legumes in an elevated tropical environment of Jos, Nigeria to determine the influence of age of growth on forage yield and nutrient concentrations in the establishment year. The experiment was a 4 harvest times (9, 13, 17 and 21 weeks after sowing; WAS) × 4 legume species (2 temperate and 2 tropical) factorial treatment arrangement in a randomized complete block design with 4 replications, conducted in the growing seasons of 2015 and again 2016. In 2015, S. guianensis produced highest (P<0.05) dry matter yield (8.2 t DM/ha), while T. pratense produced the highest yield (3.6 t DM/ha) in 2016. In both years leaf:stem ratio decreased significantly with age. In 2016 crude protein (CP) concentration declined in all species as age at harvest increased (P<0.05), while at any given age highest CP concentration occurred in T. repens and lowest in S. guianensis (P<0.05). At any age, concentration of calcium followed the pattern T. pratense>T. repens>C. molle>S. guianensis (P<0.05), while phosphorus concentration in forage declined with age at harvest with significant (P<0.05) differences only for tropical legumes. The detergent fiber concentrations (NDF and ADF) were higher in S. guianensis (P<0.05) at any harvest stage. Non-linear regression analysis suggested that these forage legumes, when planted in early June in this environment, could be harvested at the optimum stages of 15, 16, 18 and 21 WAS for T. pratense, T. repens, S. guianensis and C. molle, respectively. However, more studies, especially with earlier planting dates, need to be conducted on the temperate legumes to determine their full yield potential in this environment, especially over a wider range of seasonal conditions.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45142820","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

Effects of grazing intensity and pasture type on soil organic carbon stock in the semi-arid tropics of India 印度半干旱热带地区放牧强度和牧场类型对土壤有机碳储量的影响

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)41-51

Sunil Kumar, A. Dixit, M. Prasad, S. Rai, S. K. Mahanta, Sultan Singh, S. Radotra, P. K. Ghosh

{"title":"Effects of grazing intensity and pasture type on soil organic carbon stock in the semi-arid tropics of India","authors":"Sunil Kumar, A. Dixit, M. Prasad, S. Rai, S. K. Mahanta, Sultan Singh, S. Radotra, P. K. Ghosh","doi":"10.17138/tgft(11)41-51","DOIUrl":"https://doi.org/10.17138/tgft(11)41-51","url":null,"abstract":"Pastures may act as carbon sources and sinks depending on grazing pressure and management practices. Soil organic carbon (SOC) stock and its fractions were quantified under 3 different grazing intensities using 5, 10 and 15 sheep/ha under sown, improved and natural pastures in the semi-arid tropics of India. Results revealed that after 3 years, improved pasture had significantly higher particulate organic carbon (POC ~4.5 g/kg), SOC (~0.53 %), total organic carbon (TOC~7 g/kg) and SOC stock (~15 mg/ha) as compared with sown and natural pastures. Labile carbon (LC ~185 mg/kg) and soil microbial biomass carbon (SMBC ~378 µg/g soil) were higher under natural pasture. A moderate grazing intensity of 10 sheep/ha resulted in significantly greater carbon fractions, TOC and SOC stock. SOC stock and its fractions were significantly higher in the topsoil layers as compared with the subsoil layers. These results indicate that improved pasture management practices with moderate grazing intensity can be recommended for improving SOC stock and its fractions in semi-arid tropical pastures.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44536273","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

Estimación de la oferta de forraje y la calidad nutricional del pasto Urochloa humidicola cv Llanero partir de imágenes multiespectrales. 估计草饲料供应和营养质量Urochloa humidicola简历Llanero从多光谱成像仪。

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)61-74

Raúl Alejandro Díaz Giraldo, Mauricio Álvarez de León, Álvaro Rincón Castillo, Otoniel Pérez López, Edgar Cárdenas Rocha, William Posada Asprilla

{"title":"Estimación de la oferta de forraje y la calidad nutricional del pasto Urochloa humidicola cv Llanero partir de imágenes multiespectrales.","authors":"Raúl Alejandro Díaz Giraldo, Mauricio Álvarez de León, Álvaro Rincón Castillo, Otoniel Pérez López, Edgar Cárdenas Rocha, William Posada Asprilla","doi":"10.17138/tgft(11)61-74","DOIUrl":"https://doi.org/10.17138/tgft(11)61-74","url":null,"abstract":"El uso de imágenes multiespectrales en la evaluación de pasturas se ha convertido en una herramienta práctica para la gestión de los sistemas pastoriles a nivel predial, ya que estas permiten construir índices de vegetación (IV) los cuales se relacionan con diferentes características productivas y fisiológicas de las plantas. El objetivo de este estudio fue estimar la oferta de forraje y la calidad nutricional de una pastura de Urochloa humidicola cv Llanero a partir de IV. La oferta de forraje (OF) y la altura de planta (ALP) fueron evaluadas en campo a los 28 días de rebrote, tomando muestras para análisis espectro radiométrico y para determinar los contenidos de proteína cruda (PC), fibra detergente neutro (FDN), fibra detergente ácido (FDA) y lignina (LIG). Los vuelos se realizaron a 70 metros de altura y se evaluaron siete IV (NDVI, GCI, SRPI, SR, GNDVI, SAVI y RDVI). El análisis de los datos se realizó por medio de componentes principales (CP) y modelos aditivos generalizados (GAM). Las variables que más contribuyeron a la formación del CP1 fueron las asociadas a la calidad nutricional del pasto y para el CP2 se agruparon las variables asociadas a la disponibilidad de forraje. El índice que mejor se relacionó con la OF fue el NDVI, con un efecto significativo por parte de la ALP (p≤0.001) y para la PC con el GNDVI. Los resultados para FND, FDA y LIG, presentaron un R2 bajo.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45761214","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

Fermentation losses and aerobic stability of elephant grass silages containing Parkia platycephala pod meal and urea 含板栗豆粕和尿素的象草青贮发酵损失及有氧稳定性

IF 0.7 4区农林科学

Tropical Grasslands-Forrajes Tropicales Pub Date : 2023-01-31 DOI: 10.17138/tgft(11)52-60

Luana Andrade da Costa, R. Edvan, L. Bezerra, D. L. D. S. Jácome, José Pires De Carvalho Neto, Alex Rodrigues De Sousa, Mayra Fernanda Alves De Macedo, O. T. Medeiros, T. P. Dias-Silva, M. D. de Araújo

{"title":"Fermentation losses and aerobic stability of elephant grass silages containing Parkia platycephala pod meal and urea","authors":"Luana Andrade da Costa, R. Edvan, L. Bezerra, D. L. D. S. Jácome, José Pires De Carvalho Neto, Alex Rodrigues De Sousa, Mayra Fernanda Alves De Macedo, O. T. Medeiros, T. P. Dias-Silva, M. D. de Araújo","doi":"10.17138/tgft(11)52-60","DOIUrl":"https://doi.org/10.17138/tgft(11)52-60","url":null,"abstract":"Fermentation losses and aerobic stability of elephant grass silages with inclusion of 4 levels of Parkia platycephala pod meal (PP) (0, 10, 20 and 30 %) and 2 levels of urea (0 and 1.5 %) on as-fed basis were evaluated. The silages were analyzed for gas and effluent losses, dry matter recovery (DMR), pH and aerobic stability (pH and temperature) to determine effects of interactions between levels of urea and PP on gas losses, dry matter recovery, temperature and pH of the silages. The combination of urea and PP increased gas losses and reduced the DMR. PP reduced effluent losses and urea increased aerobic stability of the silages. pH values decreased with inclusion of PP and increased with use of urea. Silages containing 20 and 30 % PP showed greater stability over time, especially when associated with urea. PP with urea were effective in reducing effluent losses, maintaining DMR and allowing higher aerobic stability, with stability rupture from 40 h with the inclusion of 20 % of PP in elephant grass silages.","PeriodicalId":56049,"journal":{"name":"Tropical Grasslands-Forrajes Tropicales","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48060567","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