【摘要】 依据系统工程的基本原理,对宁南半干旱旱作农区的农牧业系统进行优化设计,拟定了现状农牧业优化结构和潜势农牧业优化结构两套方案。陶庄实验—示范区的8年实践证明,以扩种多年生豆科牧草—紫花苜蓿为突破口,确立“草—畜—粪—粮”的良性物质循环体系,实施在“有机为基础,有机不足无机补”的农田培肥技术,可以有效而明显地提高旱区农田的水分转化效率,促使粮油生产、畜牧业生产和经济效益持续增长,系统生产力得以增进。为宁南半干旱区及与之相似的西北黄土高原其它地区探索出一条切实可行的农业发展模式。更多还原

【Abstract】 Based on the basic principles of systematic engieering,optimization design of agriculturaland animal husbandry system in dryland farming area in semiarid region in SouthernNingxia was conducted.Two sets of schemes of the existing optimal and potential structuresof agriculture and animal husbandry were worked out.It has been proved through the 8years’experiments in Taozhuang Experimental and Demonstrative area that with the expan-sion of planting pernnial legume forage species-alafalfa as a break through,a better systemof material circulation of“grasses-livestocks-manures-grain”can be established.The imple-mentation of soil fertility bettering techniques in the farmalnds,i,e.“organic fertilizer is thebase when organic fertilizer is in deficiency,inoeganic fertilizer can apparently improve theconversion efficiency of soil moisture in farmlands thereby to increase yields of grain and oil-bearing crops and animal husbandry production,and to keep a sustanined increase in eco-nomic returns.And the productivity of this system can also be improved.更多还原