Grazing management for more resilient mixed livestock farming systems on native grasslands of southern South America
Grazing management for more resilient mixed livestock farming systems on native grasslands of southern South America
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南美洲南部本土草原上更具弹性的混合畜牧养殖系统的放牧管理
DOI：
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发表时间：
2019
影响因子：
2.4
通讯作者：
P. Tittonell
中科院分区：
文献类型：
--
作者：
P. Modernel;V. Picasso;M. Do Carmo;W. Rossing;M. Corbeels;P. Soca;S. Dogliotti;P. Tittonell
南美洲南部的干旱在许多方面影响了放牧系统。它们降低了生物质生产率；降低了牲畜饲料摄入量、体重和繁殖性能；增加了农民的成本；减少了农民收入。据推测，简单的放牧管理变量会影响放牧系统对围场和农场规模干旱的复原力。在围场水平上评估了放牧管理对牧草和动物生产的影响，以及技术和结构变量与农场水平上的生产和经济表现之间的关系。在围场水平上控制牧草容许量的放牧试验结果表明，干旱前牧草容许量高的围场比牧草容限低的围场对牧草积累和动物活重的抗旱性显著提高。旱前牧草高度与牧草积累速率阻力呈极显著正相关(p<0.05)。
Droughts in southern South America affect grazing systems in many ways. They reduce biomass productivity; decrease livestock feed intake, weight and reproductive performance; increase farmers’ costs; and reduce farm income. It was hypothesized that simple grazing management variables affect the resilience of grazing systems to droughts at the paddock and farm scales. The effects of grazing management on herbage and animal production were assessed at paddock level, and how technological and structural variables relate to the production and economic performances at farm level. Results of a grazing experiment controlling herbage allowance at paddock level showed that resistance of herbage accumulation and animal live weight to drought was significantly higher for paddocks with higher pre-drought herbage allowance than for those managed to low herbage allowance treatments. A strong positive linear relationship was found between pre-drought herbage height and resistance of herbage accumulation rate (p
如果与森林砍伐脱钩，增加牛肉产量可以降低巴西的温室气体排放
影响因子：
30.7
作者：
De Oliveira Silva R
通讯作者：
De Oliveira Silva R