随着农业生产的发展,氮肥施用量迅速增加.研究氮肥施人土壤后的氮素平衡状况,对于了解氮肥的增产效果,提高氮肥的利用率,和环境保护等来说,都是极为重要的.氮肥施人土壤后,一部分被作物吸收,一部分残留在土壤中,一部分则通过不同途径而损失.气候、土壤、耕作和栽培技术,以及氮肥的种类、施用时期和施用方法等因素,都对氮肥的氮素平衡状况产生显著的影响.因此,这三部分氮素占施入氮素总量的比例也 With the development of agricultural production, the amount of nitrogen fertilizer increased rapidly.Studying nitrogen balance after nitrogen application in soil is very important for understanding the effect of increasing nitrogen fertilizer yield, increasing the utilization rate of nitrogen fertilizer, and environmental protection Nitrogen fertilizer applied to the soil, part of it is absorbed by the crop, some remain in the soil, and some are lost through different channels. Climate, soil, farming and cultivation techniques, as well as the type of nitrogen fertilizer, application period and application methods and other factors, Nitrogen balance of nitrogen have a significant impact.Therefore, these three parts of the total amount of nitrogen applied to the nitrogen ratio also