温度和水分对草甸草原土壤氧化亚氮产生速率的调控

Effects of soil moisture and temperature on N_2O production rate of meadow grassland soil.

通过试验室模拟试验,研究了调控草甸草原黑钙土N2O产生速率的因素.结果表明,土壤水分对草甸草原土壤N2O产生速率有重要影响(F=6·149,P<0·01).但相关性分析表明,草甸草原土壤含水量与N2O的产生速率间线性相关不显著.就土壤N2O的产生速率而言,温度的影响远低于土壤水分的影响(F=2·275,P=0·106).土壤水分和温度对不同生长阶段的草甸草原土壤N2O产生速率的调控作用主要表现为阶段性的多阶多项式关系:y=ax3+bx2+cx+d,其中a、b、c、d是常数.

With incubation test, this paper studied the effects of soil moisture and temperature on the N2O production rate of meadow grassland ehernozem in Inner Mongolia. The results showed that soil moisture had a significant effect on the N2O production rate, with a non-linear relationship between them. Soil temperature had less effect than soil moisture. Their effects on the test soil N2O production rate at different growth stages could be described as a multi-order polynomial relationship y = ax^3 ＋ bx^2 ＋ cx ＋ d, where a, b, c and d were the constants.