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土壤呼吸是陆地生态系统碳循环的重要环节,在全球气候变暖的背景下,研究土壤水分状况对土壤呼吸速率的影响机制对于预测未来土壤碳储量变化具有重要意义。基于此,以阿克苏地区的灰枣为对象,通过人为控制灌溉量(80 m3、120 m3、160 m3),研究灌溉量对枣树土壤呼吸速率的影响。表明土壤呼吸速率在不同灌溉量下均出现单峰曲线,灌溉量的增大会促进土壤呼吸速率,过量则反之。土壤温度对土壤呼吸速率的影响显著差异。
Soil respiration is an important step in the carbon cycle of terrestrial ecosystems. Studying the mechanism of soil moisture on soil respiration rate in the context of global warming is of great significance in predicting future changes of soil carbon stocks. Based on this, the effects of irrigation amount on soil respiration rate of jujube tree were studied by artificially controlled irrigation amount (80 m3, 120 m3, 160 m3). It shows that the soil respiration rate appears single peak curve under different irrigation amount, and the increase of irrigation amount will promote the soil respiration rate, while the excess amount will on the contrary. The effect of soil temperature on soil respiration rate was significantly different.