在农业生产中,使用氮肥的比重最大,但直接为栽培作物吸收的利用率却很低,大部分为50—60％或更少。怎样提高氮素化肥的有效利用率,对于促进农业生产的发展,加速实现农业现代化无疑具有重要意义。我系从1976年开始与西安化工研究所协作,在鱼化公社鱼化四队、朝阳四队进行了棉花施用氮肥增效剂均三嗪的试验。通过76、77两年在小面积上进行的试验已表明它有明 Nitrogen fertilizers have the largest share of agricultural production, but their utilization rates directly absorbed in cultivated crops are low, mostly 50-60% or less. How to improve the effective utilization of nitrogenous fertilizer is undoubtedly of great significance for accelerating the development of agricultural production and accelerating the modernization of agriculture. I started in 1976 with the Xi’an Institute of Chemical Cooperation, the four teams in the Yuguh commune Fish, Chaoyang four teams conducted a nitrogen fertilizer synergist triazine test. Experiments conducted over a small area for 76,77 years have shown that it is clear