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我省六十年代末开始进行棉花薄膜育苗移栽示范,增产效果显著,一般比直播棉每亩增产皮棉25斤左右,纯收益30元以上,因此面积不断扩大。1984年已达840余万亩,占棉田面积的74.5%,成为我省棉花提高单产、增加总产的主要栽培体系。薄膜育苗要求培育大壮苗,其标准是:“大而不老,壮而不旺”。一般3月底4月初齐苗,5月上旬开始移栽,早茬(冬闲田、麦套棉)真叶3—4片,中茬(大、元麦、早熟油菜收后移栽)5—6片,晚茬(小麦、油菜收后移栽)7—8片,部分带蕾移栽;红茎半腰,茎粗节密,白须盘根,子叶完好,叶绿少病。为此必须抓好“足肥、大缽、控温、假植”等环节,并注意提高成苗率。
In the late 1960s, the demonstration of cotton seedling transplanting was started in our province. The yield increase was remarkable. Generally, the output of cotton lint was 25 kg or more per acre compared with that of direct seeding cotton, and the net income was more than 30 yuan. Therefore, the area was continuously expanding. In 1984, it had reached more than 840,000 mu, accounting for 74.5% of the total area of cotton fields. It became the major cultivation system for cotton production in the province to increase total output and increase total output. Thin film seedlings nurturing large strong seedlings, the standard is: “big and not old, strong but not busy.” Generally end of March early April Qi Miao, early May start transplanting, early crop (winter idyllic, wheat sets of cotton) true leaves 3-4 tablets, stubble (large, wheat, precocious rape transplanting) 5-6 Film, late crop (wheat, rapeseed transplanted) 7-8, some with bud transplanting; half of the red stem, stem thick section dense, white whisker packing, cotyledons intact, less green leaf disease. To do this must grasp “enough fertilizer, big bowl, temperature control, fake planting” and other links, and pay attention to improve the rate of seedlings.