宁南半干旱黄土丘陵区农、草、畜结构优化

根据农业种植业和草畜业协调发展的原则,以农业种植、牧草生产及畜禽养殖取得最佳配合，总体获得最大效益为目标，对宁南半干旱区彭阳县中庄试验示范区农、草、畜结构进行优化,经优化，单位面积耕地粮食作物小麦(Triticum aestivum)、荞麦(Fagopyrun esculentum)及糜子(Panicum miliaceum)的种植比例分别为28%、3%和70%；经济类作物玉米(Zea mays)、马铃薯(Solanum tuberosum)、胡麻(Linum usitatissimum)、三角豆（Cicer arietinum）的种植比例分别为79%、16%、4%和2%。单位面积耕地牛、羊、猪的饲养量分别为3.7头、4.3只和1.7头；单位面积种植耕地的农业种植、饲草种植及畜禽养殖纯收益达到16 116.84元/hm2，比优化前提高了54.41%。优化结果对同类地区生态农业发展结构调整具有一定指导意义。

Optimizing the structure of the crop,grass and livestock in the semiarid loess hilly region of Southern Ningxia

According to the coordinated development's principle among crop,grass,and livestock industry,the Zhongzhuang experiment of Pengyang County in the semiarid loess hilly region of Southern Ningxia was selected to optimize the structure of the crop,grass and livestock for obtaining the biggest benefit.This study showed that the ratio of wheat,buckwheat and Millet area on the unit area was 28%,3% and 70%,respectively;The economic crops included the corn,the potato,the flax and the triangle bean and their plantin...