圆葱棉花两熟栽培是近年来我县发展起来的一种新的种植形式。它不但克服了春播棉一熟栽培经济效益低的弊病,而且发展了蔬菜生产,深受棉农欢迎,种植面积迅速扩大,到目前已达两万余亩。为了摸清圆葱棉花两熟种植方式的综合效益和相应的栽培技术,我站从1987年起,进行了四年系统的考察和总结,现将其结果介绍如下。一、圆葱棉花两熟的综合效益1.经济效益。为了评价圆葱棉花两熟的经济效益,我们在高、中、低三种肥力水浇地上,进行了纯作春棉与葱棉两熟的比较试验。从亩产量和亩 Onion cotton cultivation in two crops in recent years, my county developed a new form of cultivation. It not only overcame the shortcomings of low economic efficiency of spring cotton cultivation, but also the development of vegetable production, welcomed by cotton farmers, planting area rapidly expanded, up to now has reached 20,000 mu. In order to find out the comprehensive benefits and corresponding cultivation techniques of two-cropping cultivation of onion cotton, our station has conducted systematic investigation and summary for four years since 1987, and the results are as follows. First, the comprehensive benefits of onion cotton double-cooked 1. Economic benefits. In order to evaluate the economic benefits of the double-ripening of onion cotton, we carried out the comparative experiments of pure cotton and spring onion two-cropping on high, medium and low fertility irrigated land. From mu production and mu