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一九七八年起,我场利用棉花冬闭地种一季马铃薯,实行棉薯一年两种两收耕作制。通过几年的实践证明:马铃薯是棉花的良好前作,棉花产量在原来的基础上提高了10—15％,为什么棉薯连作,有利于棉花增产,主要原因: 一、能增加土壤有机质,改良土壤结构,提高肥力。种马铃薯的土地进行冬翻对熟化土壤,改良土壤团粒结构有较好的促进作用。马铃薯的茎叶除含氮量与红花草相近外,含磷、钾素大大超过红花草,据调查:凡亩产1500—2000斤薯块,每亩地残留鲜茎叶及根系也近有1500—2000斤,相当于亩施尿素27—36.4斤,钙镁磷肥10—14斤,氯化钾10—14斤。一九七八年二队半亩地收马铃
Since 1978, we have used winter cotton to plant one season of potato and implemented two types of two-cropping system for one year. Through several years of practice, it has been proved that potato is a good pre-production of cotton. The yield of cotton has been increased by 10-15% on the basis of the original one. The reason why continuous production of cotton is beneficial to the increase of cotton yield is mainly due to the following reasons: Firstly, it can increase soil organic matter and soil Structure, improve fertility. Winter planting of potato land can promote the maturation of soil and soil aggregate structure better. In addition to the nitrogen content of potato and safflower grass similar to phosphorus and potassium greatly exceeded the red flowers, according to the survey: where 1500-2000 kg per mu potato, per mu residual fresh stems and leaves and the root system is also near 1500 -2000 pounds, equivalent to 27-36.4 acres of urea urea, calcium magnesium phosphate fertilizer 10-14 pounds, 10-14 pounds of potassium chloride. Second half of the second team in 1978 received the bell