论文部分内容阅读
氮肥施入土壤后,只有一半左右的氮素被作物吸收利用,有相当大的一部分氮素白白损失掉了。氮肥损失的原因主要有:1、氮肥直接挥发损失。2、氮肥经土壤反硝化作用,分解成气体跑掉。将肥料加上一种药剂,可在一定时间内抑制土壤中硝化微生物的活动,使氮素以铵的形态被土壤吸附,减少氮素损失,延长肥效时间,提高氮肥利用率,这种药剂就是硝化抑制剂,也称“氮肥增效剂”。目前所用的氮肥增效剂有:6氯—2—(三氯甲基)吡啶、脒基硫脲、2.5—二氯硝基苯、均三嗪、4—氨基—1.2.4三唑盐酸盐。
Nitrogen applied to the soil, only about half of the nitrogen absorbed by crops, a considerable part of the nitrogen lost in vain. The main reasons for the loss of nitrogen fertilizer: 1, direct loss of nitrogen loss. 2, nitrogen by the soil denitrification, decomposed into gas ran away. The fertilizer plus a pharmaceutical agent can inhibit the activity of nitrifying microorganisms in the soil for a certain period of time, allowing the nitrogen to be adsorbed by the soil in the form of ammonium, reducing the nitrogen loss, prolonging the fertilizer effective time and increasing the nitrogen fertilizer utilization rate, which is Nitrification inhibitor, also known as “nitrogen fertilizer synergist.” Currently used nitrogen synergists are: 6 chloro-2- (trichloromethyl) pyridine, guanyl thiourea, 2.5-dichloronitrobenzene, are triazine, 4-amino-1.2.4 triazole hydrochloride salt.