尿素是我省的主要氮肥品种,约占全省化肥施用量的60～70％,存在的主要问题是利用率不高,增产效果不大,有时还因使用不当引起肥害。近几年来,我所着重研究了尿素的施用技术。与此同时还探讨了尿素在旱地土壤中的转化扩散及损失问题。目的是查清尿素的变化规律,为改进使用方法提高其利用率提供依据,现报导部分研究结果,并就与施肥技术有关的几个问题提出初步意见。 Urea is the main nitrogenous fertilizer variety in our province, accounting for about 60-70% of the province’s chemical fertilizer application. The main problems are the low utilization rate, little stimulation effect and sometimes fatal injury caused by improper use. In recent years, I have focused on the application of urea technology. In the meantime, the problem of conversion, diffusion and loss of urea in dryland soil was also discussed. The purpose is to find out the law of the change of urea and provide basis for improving the utilization method to improve its utilization rate. Some research results are reported and some preliminary opinions on several issues related to fertilization technology are put forward.