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我国山西、新疆、辽宁等省(区),已肯定地膜覆盖植棉技术是一项行之有效的增产措施。我省自然条件,耕作制度与北方棉区迥然不同,棉花地膜覆盖栽培经济效益如何? 可否普遍推广?这方面尚没有现成的经验可供借鉴。我们带着这个问题,1982年在地处洞庭湖区的常德县蒿子港公祉进行了初步研究,现将结果简要报道如下。一、材料和方法供试品种为洞庭一号。地膜采用无色塑料超薄膜(厚度0.018毫米)。试验分三类五组,即无前作地全覆盖,蚕豆地半覆盖(3行区盖2个行间) 和营养钵覆盖育苗等三类。前两类又各分为两组:地膜盖至棉花出苗时,剪膜露苗,一直不揭(简称盖剪处理);地膜盖至棉花出苗即揭(简称盖揭处理)。全覆盖的两组分别为三个重复,半覆盖的两组分别为两个重复,均为对此法排列,田间管理属当地中上水平,农事操作力求一致。
China Shanxi, Xinjiang, Liaoning and other provinces (regions), cotton cover plastic film technology has been affirmed an effective stimulation measures. The natural conditions of our province, farming system and the northern cotton area is very different from cotton mulching cultivation of economic benefits? Universal universal? There is no ready-made experience in this area for reference. With this issue in mind, we conducted a preliminary study in 1982 on the public welfare of Artemisia Harbor in Changde County, located in the Dongting Lake area. The results are briefly reported as follows. First, materials and methods for the test varieties Dongting one. Plastic film with colorless plastic ultra-thin film (0.018 mm thickness). Tests were divided into three categories of five groups, that is, all without exception to cover the whole, half-covered broad beans (3 lines covered 2 rows) and nutrition bowls covering three kinds of nursery. The first two categories are divided into two groups: the plastic cover to the emergence of cotton, cut the membrane exposed seedlings, has not been exposed (referred to as cover shear treatment); plastic cover to the cotton seedling that Jie (referred to as cover Jie treatment). Full coverage of the two groups were three repeats, two groups of semi-covered were two repeats, are arranged for this method, field management is a local level, agricultural operations strive to be consistent.