我市为高寒山区,有30%的稻田属于冷浆型。这种类型的稻田地下水位高,土体冷凉,还原性强,所以有效磷、钾含量低,根系活力下降,易导致秧苗生长发育缓慢,有效分蘖减少,产量难以提高。在生产上,由于部分农民盲目加大氮肥投入,相对地使冷浆稻田的磷、钾含量更加缺乏,造成水稻营养失 My city is alpine mountainous area, 30% of the paddy field belongs to the cold slurry type. This type of paddy field has high groundwater level, cold soil and strong reducibility. Therefore, the effective phosphorus and potassium contents are low, and the root activity is decreased. The seedling growth and development are slow, the effective tillers are reduced, and the yield is hard to be increased. In production, due to blindly increasing the input of nitrogenous fertilizer by some peasants, the phosphorus and potassium contents of cold paddy rice fields are relatively scarce, resulting in the loss of rice nutrition