有收无收在于水,收多收少在于肥。近些年来,随着种植结构的调整,农作物产量的提高和复种植数的增加,土壤肥力的消耗也呈增加趋势,导致地力的下降。加之,有机肥的施用量虽然有所增加,但增加不多,而化肥的用量却逐年增加,尤其是氮、磷用量增加比较明显,在化肥方面,重氮、轻磷,忽视钾的 There is income confiscated in the water, income and more income is less fat. In recent years, with the adjustment of planting structure, the increase of crop yield and the increase of multiplication, the consumption of soil fertility also tends to increase, resulting in the decline of soil fertility. In addition, although the application rate of organic fertilizer has increased, but increased little, but the amount of chemical fertilizer has increased year by year, especially nitrogen and phosphorus increased significantly, in terms of fertilizer, diazo, phosphorus, potassium neglect