稻田磷钾肥简易试验法

• 作 者: 臧惠林
• 机 构: 中国科学院南京土壤研究所红壤组,
• 出 处: 农业科技通讯
• 发表日期: 1977年04期
• 关键词: 磷钾肥 水稻插秧 钾离子 胶体吸附 成块 大量元素 营养诊断 内扩散 缺钾 可及时

塞秧蔸是群众创造的一种施肥方法。我们在基点用这种方法做看苗诊断的试验,效果很好,能及时判断稻田是不是需要施磷钾肥料。我们把这种方法叫做稻田磷钾肥简易试验法。比如,为判断稻田是不是需要施用钾肥,就在水稻插秧返青后,选生长均匀一致的地段,用硫酸钾或氯化钾2两,塞秧蔸50—60穴(用稻田泥土与肥料拌和成块,塞到禾苗旁1—1.5寸处),两端插上标记。由于钾离子被土壤胶体吸附,通常在2寸范围内扩散,对邻穴显不出肥效,同时,磷钾是作物需要

Seedling 蔸 is a kind of fertilization method created by the masses. We use this method in the base point to do Miao diagnosis test, the effect is very good, can promptly determine the paddy field is not needed phosphorus and potassium fertilizer. We call this method called paddy P and K simple test method. For example, in order to determine whether paddy fields need to use potassium fertilizer, just after the rice is transplanted to rejuvenate, select a uniform growth area, with potassium sulfate or potassium chloride two two, seedlings sedge 50-60 points (with paddy soil and fertilizer into Block, plug to the seedlings 1-1.5 inch), both ends marked. As potassium ions are adsorbed by soil colloids, they generally spread within a 2-inch range and show no fertility to neighboring cells. Phosphorus and potassium are needed by crops