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一、问题的提出 种植苜蓿能改良土壤结构,给土壤积累大量的有机质,提高土壤肥力,从而提高单位面积生产效率。种植苜蓿,还能降低地下水位,防止土壤盐渍化,并有适当抑制杂草和抗旱保商的功用。广种苜蓿又为农牧结合提供了条件,特别是在贯彻以苜蓿养猪、猪养田方面,已经收到显著的成效。自治区党委一贯重视牧草田轮作,扩大苜蓿栽种面积。兵团农七师二十一团农场自1951年到1961年的10年间,播种苜蓿
First, the problem raised alfalfa planting can improve the soil structure, to the accumulation of large amounts of organic matter in soil, improve soil fertility, thereby enhancing the production efficiency per unit area. Planting alfalfa, but also reduce groundwater levels, prevent soil salinization, and have appropriate suppression weeds and drought protection business functions. A wide range of alfalfa and the combination of agriculture and animal husbandry provided the conditions, especially in the implementation of alfalfa pigs, pig farms, has received significant results. Autonomous Region Party Committee has always attached importance to forage grass field rotation, expand the planting area of alfalfa. Corps Nongqijun twenty-one regiment farm from 1951 to 1961 for 10 years, planting alfalfa