缺钾棉田的最明显特征是引起棉株早衰,严重缺钾的棉株甚至可提前50—60天凋叶,因而不能充分地利用有效的生长季节和土壤肥水条件,导致单位面积的铃数减少和铃重降低。 本省棉区多分布在钱塘江口和杭州湾南北两岸,土壤母质是浅海沉积物,以细沙土和粉沙壤土为主,部分是沙粘壤土。根据我们采集到的100多个土样分析,土壤的速效 The most obvious feature of potassium-deficient cotton fields is the premature aging of cotton plants. Severe potassium-deficient cotton plants can even witness leaf decay 50-60 days earlier, thus failing to fully utilize the effective growing seasons and soil fertility conditions, resulting in a reduction in bolls per unit area And reduce the weight of the bell. The cotton area in the province is mainly distributed in the Qiantang River estuary and the north and south banks of the Hangzhou Bay. The parent material of the soil is shallow sea sediments, mainly composed of fine sand and silty loam, partly sandy loam. According to our analysis of more than 100 soil samples collected, the soil available