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我市地处苏北沿海平原,全市80万亩棉花有90%以上面积为营养钵育苗移栽。因此,能否把好育苗关,夺取早、大、壮苗,是夺取棉花早熟高产的关键。而苗床施肥是否科学合理,又是培育棉花早、大.壮苗十分重要的因素之一。我市棉农对苗床培肥历来比较重视,秋播时预留苗床,越冬和早春期间,在预留苗床上施用人粪、畜禽肥,饼肥等有机肥,开春后制钵前一周施用无机肥,以增加苗床土速效养分。但是,棉农施用化肥时,往往偏施氮化肥,忽视磷钾肥和微肥的使用。致使钵土营养“不全”,导致棉苗“偏食”,旺而不壮,难以夺得“壮苗”,影响棉花早发。1986年推广配方施肥以来,
The city is located in the coastal plain of northern Jiangsu Province, the city’s 80 million mu of cotton has more than 90% of the area of nutrition bowl transplanting. Therefore, whether good seedling clearance, to seize early, big, strong seedlings, is to seize the key to high yield of cotton precocious. The fertilization of seedbed is scientific and reasonable, but also to cultivate cotton early, big, strong seedling is one of the important factors. Cotton farmers in our city have always paid more attention to the cultivation of seedbed. In autumn, seedbed reservation is required. During the winter and early spring, manure, livestock and poultry fertilizer, cake fertilizer and other organic fertilizer are applied on the reserved seedbed. , To increase seedbed soil available nutrients. However, when farmers apply chemical fertilizers, they tend to bias nitrogenous fertilizers and neglect the use of phosphorus, potassium and trace fertilizers. Resulting in soil nutrition “incomplete”, leading to cotton seedlings “partial eclipse”, prosperous and not strong, it is difficult to win “strong seedlings”, affecting cotton early onset. Since the promotion of formula fertilizer in 1986,