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据中国科学院成都地理研究所分析,四川盆地各类土壤中的有效态硼含量均低。621个土壤样品分析结果,土壤有效态硼平均为0.23ppm,其中小于缺硼临界值0.5ppm的占96.1％,因此,由于土壤有效硼含量低,棉花客易发生缺硼。过多施用钾肥,也会加重棉花缺硼。因此,施钾多的田块更应配合施硼。棉花是需锌较多的作物,对锌很敏感。由于土壤含锌量低和重施氮、磷肥,棉花容易发生缺锌。据试验证明,棉花施锌肥的增产潜力大,效果好。
According to the Chengdu Institute of Geography, Chinese Academy of Sciences, the available boron content of all kinds of soils in Sichuan Basin is low. The results of 621 soil samples showed that the available soil boron was 0.23ppm on average, of which 96.1% was less than 0.5ppm of boron deficiency threshold. Therefore, due to the low availability of boron in soil, boron deficiency easily occurred in cotton. Excessive use of potash, cotton will also increase the lack of boron. Therefore, more potassium field plots should be applied with boron. Cotton is a crop that needs more zinc and is very sensitive to zinc. Due to the low content of soil zinc and nitrogen, phosphate, cotton prone to zinc deficiency. According to the test proved that cotton zinc fertilizer production potential, good effect.