宁夏南部半干旱水土流失地区,在作物合理布局的基础上,建立以粮——豆——草轮作为中心的综合配套技术体系,做到轮作制度化、栽培规范化,施肥模式化。系统内的能量转化效益提高14.7%,粮食单产和总产分别较实验前提高1.2倍和1倍。其中“轮作中心的平衡施肥”,既考虑到氮、磷等主要营养元素的协调平衡,也考虑到周期性的供求平衡,提高了系统内土壤养分的调控能力和稳定性。 In the semi-arid soil erosion area of ​​southern Ningxia, based on the rational layout of crops, a comprehensive supporting technology system centered on grain-bean-grass-wheeler will be set up to institutionalize crop rotation, standardized cultivation and fertilization mode. The energy conversion efficiency within the system increased by 14.7%. The yield per unit area and the total output of the system were increased 1.2 times and 1 times respectively compared with that before the experiment. Among them, “balanced fertilization in the rotation center” not only takes into consideration the coordination balance of the main nutrients such as nitrogen and phosphorus, but also takes into account the cyclical balance between supply and demand and improves the regulation capacity and stability of soil nutrients in the system.