Chilean Journal of Agricultural & Animal Sciences最新文献_第4页

COMPOSICIÓN DE CARNE DE CERDO EN UN SISTEMA DE PRODUCCIÓN NATURAL 自然生产系统中的猪肉成分

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-12-01 DOI: 10.4067/s0719-38902019005000501

Valeria Velasco, V. Vera, Fernando Bórquez, Pamela S. Williams, Manuel Faúndez, J. Alarcón-Enos

引用次数: 0

EFICACIA IN VITRO DE EXTRACTOS DEL HONGO COMESTIBLE PLEUROTUS OSTREATUS KUMM PARA EL CONTROL DE SITOPHILUS ZEAMAIS MOTSCHULSKY 食用蘑菇平菇提取物对玉米象的体外防治效果

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-12-01 DOI: 10.4067/s0719-38902019005000505

V. Pino, Gonzalo Silva-Aguayo, Inés Figueroa-Cares, M. Gerding-González, P. Loyola, Gloria Sarahi Castañeda-Ramírez, Liliana Aguilar-Marcelino

{"title":"EFICACIA IN VITRO DE EXTRACTOS DEL HONGO COMESTIBLE PLEUROTUS OSTREATUS KUMM PARA EL CONTROL DE SITOPHILUS ZEAMAIS MOTSCHULSKY","authors":"V. Pino, Gonzalo Silva-Aguayo, Inés Figueroa-Cares, M. Gerding-González, P. Loyola, Gloria Sarahi Castañeda-Ramírez, Liliana Aguilar-Marcelino","doi":"10.4067/s0719-38902019005000505","DOIUrl":"https://doi.org/10.4067/s0719-38902019005000505","url":null,"abstract":"The maize weevil, Sitophilus zeamais Motschulsky, is one of the most important pests of stored cereals worldwide. Currently, it is mainly controlled with the use of synthetic insecticides, with poor variation of action mechanisms. Natural compounds, particularly plant extracts, are an alternative to control this pest. The objective of this study was to evaluate, under laboratory conditions, the insecticidal/insectistatic effect of extracts with different polarity solvents of Pleurotus ostreatus Kumm against S. zeamais adult. The variables evaluated were contact and fumigant toxicity, repellency and antixenosis. A completely randomized experimental design was used. The highest toxicity was obtained by fumigation with ethyl acetate extract with a mortality of 100% at a concentration of 30 μL 0.15 L-1 air, and a CL50 of 18,3 μL at 0,15 L-1 air. Extracts in ethyl acetate and distilled water showed Chilean J. Agric. Anim. Sci., ex Agro-Ciencia (2019) 35(3): 294 293-303. repellent activity, while all extracts exhibited antixenosis effects. It can be concluded that P. ostreatus extract in ethyl acetate has fumigant, repellent and antixenotic activity against S. zeamais adult.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45702711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

EFICIENCIA AGRONÓMICA DE NITRÓGENO Y PRODUCCIÓN DE Cynodon plectostachyus (K. Schum.) Pilg. EN FUNCIÓN DE DOS FRECUENCIAS DE CORTE 氮的农艺效率和plectostachyus的生产Pilg。基于两个切割频率

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-12-01 DOI: 10.4067/s0719-38902019005000405

Dídimo Efraín Vera Arteaga, G. García, G. Cedeño-García, Jessica Elizabeth Cargua Chávez, María Garay Lugo

引用次数: 3

ÍNDICES DE RIESGO PARA LA SUPERFICIE SINIESTRADA CULTIVADA CON FORRAJES 用饲料种植的灾区风险指数

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-12-01 DOI: 10.4067/s0719-38902019005000506

J. M. Torres-Rojo, Roberto Isaac Bahena-González

{"title":"ÍNDICES DE RIESGO PARA LA SUPERFICIE SINIESTRADA CULTIVADA CON FORRAJES","authors":"J. M. Torres-Rojo, Roberto Isaac Bahena-González","doi":"10.4067/s0719-38902019005000506","DOIUrl":"https://doi.org/10.4067/s0719-38902019005000506","url":null,"abstract":"La información y el entendimiento de la dinámica del clima y su efecto en cultivos agrícolas han mejorado en años recientes. Este avance es resultado del desarrollo de modelos predictivos y estructurales más complejos. El objetivo del estudio fue demostrar empíricamente la existencia de una relación de “Ley de Poder” de la distribución de frecuencias de las superficies cultivadas con forrajes que son siniestradas anualmente. La invariabilidad de escala de la relación probada es usada para construir dos índices de riesgo. El primero es un indicador de siniestralidad y el segundo un indicador de la superficie máxima en riesgo de siniestro dada una probabilidad de ocurrencia. El análisis se realiza a nivel regional y nacional para los diferentes sistemas de producción (Primavera-Verano temporal, Primavera-Verano riego, Otoño-Invierno temporal y Otoño-Invierno riego). La prueba de la relación de Ley de Poder se realizó con el modelo Pareto y el ajuste de la distribución empírica se hizo a través de cuadrados mínimos no lineales. Los resultados muestran que las estimaciones del parámetro de escala de la “Ley de Poder” oscilan entre -1,42 y -1,70 para diferentes sistemas en diferentes unidades territoriales. Los estimadores son estadísticamente similares a los valores esperados y además cumplen con el principio de universalidad y la hipótesis de proporcionalidad de tamaño finito. Por ello, se concluye que la superficie siniestrada de cultivos forrajeros es un evento que sigue un comportamiento críticamente auto-organizado. De aquí que los índices de riesgo derivados de esta relación son índices de riesgo de largo plazo.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42787129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DIVERSIDAD FÚNGICA EN SUELOS CON DIFERENTES USOS EN LA REGIÓN PAMPEANA ARGENTINA 阿根廷潘帕斯地区不同用途土壤中的真菌多样性

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-08-01 DOI: 10.4067/s0719-38902019005000301

Facundo J. Marcos Valle, V. Moreno, L. Silvestro, C. Castellari, Alberto Diaz Delfino, Y. Andreoli, L. Picone

引用次数: 0

CAMBIOS ESTRUCTURALES Y TECNOLÓGICOS DE LA GANADERÍA DEL CENTRO SUR DE CORRIENTES, ARGENTINA, EN EL PERÍODO 2005-2015 2005-2015年阿根廷科连特斯中南部畜牧业的结构和技术变化

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-08-01 DOI: 10.4067/s0719-38902019005000307

M. Calvi, H. Urcola, Silvina M. Cabrini, M. Chavez

{"title":"CAMBIOS ESTRUCTURALES Y TECNOLÓGICOS DE LA GANADERÍA DEL CENTRO SUR DE CORRIENTES, ARGENTINA, EN EL PERÍODO 2005-2015","authors":"M. Calvi, H. Urcola, Silvina M. Cabrini, M. Chavez","doi":"10.4067/s0719-38902019005000307","DOIUrl":"https://doi.org/10.4067/s0719-38902019005000307","url":null,"abstract":"Livestock production is one of the main economic activities in Corrientes province, Argentina. Therefore, understanding its dynamics is essential to design and implement efficient development programs. The objective of this study was to quantify the structural, technological and production changes in livestock systems in Corrientes, during the period 2005-2015. In these years, data on Chilean J. Agric. Anim. Sci., ex Agro-Ciencia (2019) 35(2): 116 115-125. production area, animal stocks, number of workers, herd management and production parameters were collected from 29 farms. Average and farm-level transformations were characterized through test for mean differences, test of proportions and correlation analysis. Then, a multiple correspondence analysis was used to determine changes in components of variance. Finally, clusters were formed to characterize the diversity of farms existing at the end of the study period. On average, most variables showed slight changes. Nonetheless, substantial changes were detected on individual cases. Farms specialized in cattle tended to intensify their production, while those with lower number of workers tended to increase the amount of labor employed. The results also showed that larger farms improved feeding and reproductive management of the herd, which improved weaning percentages. At the end of the study period, two types of farms with distinct sizes and technologies were identified, but reproductive and productive performances were similar for both groups.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42268394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CARACTERIZACIÓN TECNICO-PRODUCTIVA DE FINCAS LECHERAS DEL NORESTE DE LA PROVINCIA DE BUENOS AIRES, ARGENTINA 阿根廷布宜诺斯艾利斯省东北部奶牛场的技术生产特征

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-08-01 DOI: 10.4067/s0719-38902019005000304

R. Lara, B. Lazzarini, J. Baudracco

{"title":"CARACTERIZACIÓN TECNICO-PRODUCTIVA DE FINCAS LECHERAS DEL NORESTE DE LA PROVINCIA DE BUENOS AIRES, ARGENTINA","authors":"R. Lara, B. Lazzarini, J. Baudracco","doi":"10.4067/s0719-38902019005000304","DOIUrl":"https://doi.org/10.4067/s0719-38902019005000304","url":null,"abstract":"Dairy production in Argentina has been intensified, but dairy farms are facing problems to increase productivity. This work aimed to identify the major constraints on milk production in dairy farms of the North East region of Buenos Aires province, Argentina. A survey was conducted to collect production data from 29 dairy farms. The major constraints were: insufficient water provision (there is one water trough every 19 ha), and insufficient natural and artificial shade for cows (1.8 and 2.9 m2 cow-1, respectively); old dairy facilities (dating back 21 years) and lack of investment in milking equipment; long milking times (3.3 hours per milking); deficiencies in soil phosphorus (9.3 mg kg-1) and sulphates (11.7 mg kg-1); presence of nitrates in cattle drinking water and inadequate effluent storage and distribution. According to the correlation analysis performed, it can be inferred that dairy farms that increased land productivity by increasing herd size did not improve farm infraestructure to meet new requirements. Investment to cope with the problems detected might increase milk production and improve the sustainability and profitability of dairy farms.","PeriodicalId":42485,"journal":{"name":"Chilean Journal of Agricultural & Animal Sciences","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44561844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

SIMULACION DEL MICROCLIMA EN UN INVERNADERO USADO PARA LA PRODUCCIÓN DE ROSAS BAJO CONDICIONES DE CLIMA INTERTROPICAL 热带气候条件下用于玫瑰生产的温室小气候模拟

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-08-01 DOI: 10.4067/s0719-38902019005000308

Edwin Andrés Villagrán Mimar, Carlos Ricardo Bojacá Aldana

引用次数: 8

EMPERADOR INIA: NUEVA VARIEDAD DE TRITICALE (x Triticosecale Wittmack) DE INVIERNO PARA EL SUR DE CHILE emperatriz INIA:智利南部冬季小黑麦(x Triticosecale Wittmack)新品种

IF 0.3

Chilean Journal of Agricultural & Animal Sciences Pub Date : 2019-08-01 DOI: 10.4067/s0719-38902019005000302

C. Jobet, J. Zúñiga, Dalma Castillo, I. Matus, C. Alfaro, J. García