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采用“静态吸收法”和“土柱淋溶法”室内模拟实验,分别研究了6种控/缓释肥料施入土壤中的氨挥发和氮淋溶情况。结果表明:6种控/缓释肥料处理都不同程度的降低了氨挥发量和N素淋溶量。与尿素比较,6种控/缓释肥料氨挥发量分别较普通尿素减少16.62%,23.78%,32.15%,0.11%,16.59%和37.78%,氮淋溶量分别较普通尿素减少15.84%,38.27%,68.87%,46.17%,52.51%和62.01%。试验还表明控/缓释氮肥氨挥发量与不同氮肥引起的土壤脲酶活性、pH值有密切关系。
The “static absorption method” and “soil column leaching method” indoor simulation experiments were used to study the ammonia volatilization and nitrogen leaching situation of 6 kinds of controlled / slow release fertilizers applied to the soil respectively. The results showed that all six kinds of controlled / slow-release fertilizer treatments reduced ammonia volatilization and N leaching amount to varying degrees. Compared with urea, the ammonia volatilization of the six kinds of controlled / slow release fertilizers decreased by 16.62%, 23.78%, 32.15%, 0.11%, 16.59% and 37.78% respectively compared with that of ordinary urea, and the nitrogen leaching amount decreased by 15.84% and 38.27 %, 68.87%, 46.17%, 52.51% and 62.01%. The experiment also showed that controlled-release nitrogen fertilizer ammonia volatilization and different nitrogen-induced soil urease activity, pH value is closely related.