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棉花不同生育期对氮、磷、钾的吸收数量不同,不同品种和不同类型的棉株之间也有一定的差异。一般棉花现蕾以前,吸收养分较少,但这一阶段植株对磷素营养的要求特别敏感。现蕾以后棉株生育加快,需肥量增加,现蕾至开花25天左右时间,吸收氮、磷、钾分别占全生育期总吸收量的11％、7％和9％,每天吸收量比现蕾前增长3～4倍。初花至盛花15天左右时间,营养
Cotton at different growth stages had different amounts of nitrogen, phosphorus and potassium absorption, and there were also some differences between different varieties and different types of cotton plants. Before the general cotton budding, nutrient absorption less, but this stage plants are particularly sensitive to the requirements of phosphorus nutrition. After budding cotton plants to speed up the development, need to increase the amount of fertilizer, bud to flowering time of about 25 days, absorption of nitrogen, phosphorus and potassium, respectively, the total growth during the total absorption of 11%, 7% and 9% Budding before the increase of 3 to 4 times. First flowering flowers Sheng 15 days or so, nutrition