一稻旱布局的特点宁夏引黄灌区(以下简称灌区)历来旱作物面积比重大,约占水田水浇地总面积的80％以上,稻田在解放后才迅速扩展,由1950年的14.2％,发展到1963年的27.5％,共中1960年曾达30.8％。从灌区1950年、1957年和1963年三个时期的作物构成情况来看,刚解放时,粮食作物比重最大,约占全灌区作物播种面积的85％,经济作物占10％,而其它作物(如绿肥饲料、蔬菜等)只占5％;到第一个五年计划完成以后,随着耕地面积的不断扩大,粮食作 Characteristics of a paddy drought layout Ningxia Yellow River Irrigation Area (hereinafter referred to as irrigated area) has always been a large proportion of dry crop area, accounting for more than 80% of the total paddy field irrigated paddy fields only after the liberation expanded rapidly from 1950 to 14.2% To 27.5% in 1963, a total of 30.8% in 1960. According to the composition of the crops in the three periods of 1950, 1957 and 1963 in the irrigation area, the grain crop took the largest share at the time of liberation, accounting for 85% of the sown area of ​​irrigated area and 10% of the cash crops in the irrigated area, while other crops Such as green manure, vegetables, etc.) accounted for only 5%. After the first five-year plan was completed, with the continuous expansion of cultivated land,