论文部分内容阅读
采用室内恒温培养的方法,对6种高氮复混(合)肥料在不同类型土壤上的氨挥发特性及氮素转化进行研究。结果表明,土壤氨挥发速率、氨挥发累积量均表现为黑钙土>黑土>白浆土,与土壤pH呈显著正相关关系;不同肥料在土壤中的氨挥发状况各异,与掺混肥相比,控释肥料、稳定性肥料和肥包肥可推迟氨挥发速率峰值出现2d;而高塔造粒肥、脲甲醛肥料和稳定性肥料可降低氨挥发累积量5.3%~56.9%。土壤的硝化能力表现为黑钙土>白浆土>黑土,这与土壤pH、土壤质地有关;不同类型高氮复混(合)肥施入土壤后土壤铵态氮含量均表现为先快速上升,7d左右达到峰值后再缓慢下降,第40天后逐渐趋于平稳。而土壤硝态氮含量保持平稳上升状态。在3种供试土壤中,稳定性肥料均显著降低土壤硝化率。
Ammonia volatilization and nitrogen transformation of six kinds of high-nitrogen compound fertilizers on different types of soils were studied by indoor incubation method. The results showed that the ammonia volatilization rate and the ammonia volatilization accumulation in soil showed as follows: Chernozem> black soil> albic soil, and there was a significant positive correlation between soil ammonia volatilization and ammonia volatilization. Compared with controlled release fertilizer, stable fertilizer and fat fertilizer, ammonia volatilization peak could occur for 2 days. Tower granulation fertilizer, urea formaldehyde fertilizer and stable fertilizer could reduce ammonia volatilization by 5.3% -56.9%. The nitrification ability of soil showed as follows: Chernozem> Albic soil> black soil, which was related to soil pH and soil texture. The contents of soil ammonium nitrogen in different types of high-nitrogen compound fertilizer were rapidly increased , Reached the peak value after 7d and then decreased slowly, gradually stabilized after 40 days. However, the content of soil nitrate nitrogen kept a steady rise. In the three tested soils, the stable fertilizers significantly reduced the rate of soil nitrification.