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首页> 外文期刊>Journal of Natural Resources and Life Sciences Education >Ruminant Grazing of Cover Crops: Effects on Soil Properties and Agricultural Production
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Ruminant Grazing of Cover Crops: Effects on Soil Properties and Agricultural Production

机译：覆盖作物的反刍放牧：对土壤性质和农业生产的影响

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摘要

Integrating livestock into a cropping system by allowing ruminant animals to graze cover crops may yield economic and environmental benefits. The effects of grazing on soil physical properties, soil organic matter, nitrogen cycling and agricultural production are presented in this literature review. The review found that grazing cover crops generally led to increased bulk density, especially in no-till systems. On the other hand, the negative effects of grazing on penetration resistance and aggregate stability were more prominent under conventional tillage than no-till. The deleterious effects of grazing on soil physical properties were most severe when grazing was implemented at high intensity and on wet soils. Microbial biomass C was higher under grazed conditions than ungrazed conditions. Nitrogen was found to be higher when cover crops were grazed than not grazed; however, this was only true for conventional tillage systems. Generally, grazing cover crops did not negatively affect primary crop yields. Cover crops provided nutritious forage for cattle and reduced feed costs by offsetting the use of hay or other pasture.
机译：通过让反刍动物放牧来覆盖农作物，将牲畜整合到种植系统中可能会产生经济和环境效益。本文综述了放牧对土壤物理性质，土壤有机质，氮循环和农业生产的影响。审查发现，放牧覆盖作物通常会导致堆积密度增加，尤其是在免耕系统中。另一方面，在常规耕作下，放牧对耐穿透性和骨料稳定性的负面影响比免耕更为明显。当高强度放牧和在潮湿土壤上放牧时，放牧对土壤物理性质的有害影响最严重。放牧条件下的微生物生物量C高于未放牧条件下的微生物量。吃草的农作物氮比不吃草的氮高。但是，这仅适用于常规耕作系统。通常，放牧地被作物不会对初级作物的产量产生负面影响。有盖作物为牛提供了有营养的饲料，并通过抵消干草或其他牧场的使用而降低了饲料成本。

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