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气象:1996,22(7):12-16
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气候变暖对土壤化肥用量和肥效影响的实验研究
(中国农业科学院农业气象研究所,北京 100081)
The Experimental Study on the Effect of Climate Warming on Fertilizer Amount and Efficiency in the Soil
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中文摘要: 气候变暖对土壤肥料施用量和肥效有重要影响。通过对土壤分期增施3种水平的尿素实验,测定土壤中速效氮含量的动态变化,研究土壤肥效对温度的反应。结果表明,温度升高,土壤中速效氮释放量增大,释放速度加快,释放周期缩短。在450-1125kg/ha施肥水平下,每增温1℃氮释放量平均增加4%、释放周期缩短3.6天。同时,施肥量愈大,速效氮释放量也愈大,释放速度愈快。因此,在气候变暖的条件下,需相应增加施肥总量和施肥次数,减少每次施用量,提高肥效,减弱气候变暖对肥效的不利影响。
Abstract:Climate warming has important effects on fertilizer amount and efficiency in the soil. By the use of the soil fertilizer experiment under 3 urea levels with parting period,the changes of rapidly available nitrogen (N) content in the soil are measured and the responses of the soil fertilizer efficiency to temperature are studies. The results show that the release amount of N increases in the soil when temperature goes up , and the release period shortens when the release speed is up.When temperature increases 1℃,release amount of N enhances 4% on the average and release period shortens 3. 6 days. In addittion,the greater fertilizer amount,the more release amount of N is,and the quicker release speed will be. Therefore in conditions of climate warming, total is fertilizer amount and frequency should be increased relatively, but amount each time should be decreased,thereby enhancing fertilizer efficiency, reducing disadvantageous impact of climate warming on fertilizer efficiency.
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引用文本:
王修兰,徐师华,1996.气候变暖对土壤化肥用量和肥效影响的实验研究[J].气象,22(7):12-16.
,1996.The Experimental Study on the Effect of Climate Warming on Fertilizer Amount and Efficiency in the Soil[J].Meteor Mon,22(7):12-16.