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钾肥,是实现农作物高产优质不可缺少的肥料。那么,怎样巧施钾肥才能最大限度地发挥它的增产潜力呢?我们认为可根据以下情况进行施用: 1.土壤缺钾 当土壤速效钾含量在100ppm以下为缺钾,一般需要施用钾肥;低于40ppm为严重缺钾,必须重施钾肥;在150～200ppm以上则不需要施钾。不同土质速效钾利用率不同,粘性土比砂性土的钾肥利用率低些,因此粘性土要适当多施。 2.土壤环境不良 土壤环境不良会阻碍作物对钾
Potash fertilizer is an indispensable fertilizer for realizing the high yield and quality of crops. So, how clever use of potash in order to maximize its production potential? We believe that the following circumstances can be applied: 1. Soil potassium deficiency When the soil available potassium content below 100ppm potassium deficiency, the general need for potassium fertilizer; below 40ppm is a serious shortage of potassium, potassium must be re-applied; in 150 ~ 200ppm above do not need to apply potassium. Different soil available potassium utilization rate is different, clay soil than sandy soil potassium utilization rate is lower, so clay should be applied more. 2. Poor soil environment The poor soil environment will hinder crop potassium