论文部分内容阅读
一、施用磷肥过量,会使作物从土壤中吸收过多的磷素营养。过多的磷素营养会促使作物呼吸作用过于旺盛,消耗的干物质大于积累的干物质,造成繁殖器官提前发育,引起作物过早成熟,籽粒小,产量低。二、诱发土壤缺锌。过量施用磷酸钙后,会使土壤里的锌与过量的磷作用,产生磷酸锌沉淀,作物无法吸收,使作物出现明显缺锌症状;过量施用钙镁磷肥等碱性磷肥后,会使土壤碱化,使锌的有效性降低,影响作物对锌的吸收。
First, the use of phosphate excess, will allow crops to absorb excessive phosphorus nutrition from the soil. Too much phosphorus nutrition will cause the crop to breathe too vigorously, consume more dry matter than the accumulated dry matter, resulting in the premature growth of the reproductive organs, causing the crops to mature prematurely, with small grains and low yields. Second, induce zinc deficiency in soil. Excessive application of calcium phosphate, the soil will make zinc and excess phosphorus role, resulting in precipitation of zinc phosphate, the crop can not be absorbed, so that the crop appeared obvious zinc deficiency; excessive application of calcium phosphate and other alkaline phosphate fertilizer, the soil will make alkali Therefore, the effectiveness of zinc is reduced, affecting the zinc absorption of the crop.