论文部分内容阅读
目前农田施用的化学氮肥、碳铵、硫铵、尿素、氨水等,多采用表层撒施、泼施或灌施的方法,浪费损失很大,一般利用率仅有30-50％,这是当前生产上必须研究解决的问题。据国内外试验研究,采用深层施肥技术,即把氮肥直接深施于表土层以下的土壤中,可大为减少氮肥的损失,从而能显著地提高肥效,充分发挥氮肥的增产效果。为了在我省各地不同农业土壤气候条件下验证深施效果,提出相适应的深施技术,以促进深施技术的推广应用,我们采用田间小区
At present, chemical nitrogenous fertilizers, ammonium bicarbonate, ammonium sulfate, urea, ammonia and the like used in farmland are mostly applied by sprinkling, applying or applying on the surface of the farmland. The waste of the waste is very large, and the general utilization rate is only 30-50% The problems that must be solved in production must be studied. According to the domestic and foreign experimental research, the deep fertilization technology, that is, the direct application of nitrogen fertilizer to the soil below the topsoil, can greatly reduce the loss of nitrogen fertilizer, thereby significantly increasing the fertilizer efficiency and giving full play to the stimulation effect of nitrogen fertilizer. In order to verify the effect of deep application in different agro-climatic conditions in different parts of our province, the paper puts forward the deep application of appropriate technology to promote the popularization and application of deep application of technology. We use the field plot