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我县位于长江下游,常年无霜期200天左右,降水量1037毫米左右,土质为沙壤土。全县46万亩耕地,三熟制面积大,复种指数高。棉田面积12万亩,属麦、棉轮作地区。为了粮棉双高产,1974年以来全面推行了棉花营养钵育苗移栽,1979年全县亩产皮棉133斤。当年气候条件,7月下旬—8月中旬雨水少,有利于开花结桃,8月下旬有部分棉田开始脱力早衰,据统计,全县约有3万亩棉田早衰,占全县棉田面积的25％左右,早衰棉田一般比不早衰棉田每亩少收皮棉15—20斤,严重的地块甚至更多些。为了探索早衰的规律,我们在全县范围内选择了14个生产队进行调查,调查面积350多亩,其中早衰面积占150.5亩。
My county is located in the lower reaches of the Yangtze River, perennial frost-free period of about 200 days, about 1037 millimeters of precipitation, sandy loam soil. The county 46 acres of arable land, three large area, multiple crop index high. An area of 120,000 acres of cotton, wheat, cotton for the region. In order to double the high yield of grain and cotton, since 1974, the full implementation of cotton seedlings transplanted nutrition bowl, in 1979 the county per capita lint 133 pounds. In the year climatic conditions, late July - mid-August less rainfall, conducive to flowering peach, late August some cotton fields began to decolonize premature aging, according to statistics, the county about 30,000 acres of cotton fields premature decline, accounting for the county cotton area of 25 % Or so, premature bad cotton fields generally less cotton fields per acre than the earlier received less lint 15-20 pounds, even more serious land plots. In order to explore the law of premature aging, we selected 14 production teams within the county-wide survey to investigate the area of 350 mu, of which 150.5 mu of premature aging area.