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目前,我国有些地区的化学氮肥用量越来越高,而其经济效益却日渐下降.然而随着我国农业现代化建设的迅速发展,化学氮肥的施用量必将普遍地提高.所以,开展提高化学氮肥利用率的研究,以进一步发挥肥料效应,实现增肥增产增收,具有重要的科学和生产上的意义.宁夏引黄灌区稻田中,目前化学氮肥施用水平并不算低,但因化肥利用率较低,致使不少社队生产成本上升,增产不增收.针对这一严重问题,我们在该区稻田进行了提高化学氮肥利用率,改进施肥技术的研究,并得结果阐述于后.
However, with the rapid development of agricultural modernization in our country, the application rate of chemical nitrogen fertilizers will be generally raised, so it is necessary to improve the chemical nitrogenous fertilizer Utilization of the study in order to further play a fertilizer effect, to achieve increased yield by fertilizer, has important scientific and production significance.Ningxia Yellow River Irrigation Area, the current level of chemical nitrogen fertilizer application is not low, but the fertilizer utilization rate than In view of this serious problem, we conducted a study on improving chemical nitrogen fertilizer utilization rate and fertilization technology in paddy fields in this area, and obtained the results afterwards.