南方两熟制栽培棉区,如何提高粮棉单位面积产量,并达到种地养地相结合,历来是一项重大研究课题。 所谓棉花凹形栽培法,就是在两熟制棉田上,采用早棉育苗套栽,晚棉连作直播的种植方法。这个试验是根据中国农业科学院棉花研究所进行的棉花稀与密、高与矮间作种植方式试验结果,和在天门县原有早、晚棉套种经验的基础上进行设计的。经过 It is always a major research topic how to improve the yield per unit area of ​​grain and cotton and achieve the combination of planting and raising of cultivated land in southern China. The so-called cotton concave cultivation method, that is, in the two-cropping cotton fields, the use of early cotton seedling sets planted, cotton planting for direct seeding method. This experiment is based on the results of cotton thin and dense cotton planting experiments conducted by Cotton Research Institute of Chinese Academy of Agricultural Sciences and based on the original early and late cotton interplanting experience in Tianmen County. after