Based on the concept of seasonal grazing production systems and agro-grassland ecological systems, the new idea of key pasture has been formed.
基于季节畜牧业和草地农业生态系统的思想，提出了关键场的新概念；
The result of three years from 1997 to 1999 showed significant effect of post grazing residual and P level on seasonal and annual net production of the sown pasture under sheep rotational grazing.
三年试验结果表明，绵羊在轮牧下，产草量和磷肥对全年及各月牧草净生产具有显著影响。
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