不同茎级下同种灌溉模式枣树土壤呼吸动态变化

在阿克苏地区温宿县佳木试验站利用Li-8100开路式土壤碳通量测量系统观测同种灌水模式下不同茎级枣树土壤呼吸速率。结果表明，空白地和3cm枣树土壤呼吸速率一般在02：00—04：00升到一天中的峰值，9cm枣树土壤呼吸速率在08：00—10：00，上升到一天中的峰值．1Bcm枣树土壤呼吸速率在16：00—18：00上升到一天中的峰值。在相同灌水条件下，3cm枣树、9cm枣树以及18cm呈现出径级越小土壤呼吸速率越强的规律。由土壤呼吸Q，。值得出，土壤呼吸速率对温度的敏感程度也随着枣树径级的递增呈现出递减的趋势。

Different Level Below The Same Kind of Irrigation Mode Stem-the Dynamic Changes of Soil Bresathing

In WcnSuXian aksu jiamu experiment stations use Li-8100 open type soil carbon flux measurement system observation for the same water mode different soil respiration rate stems village level. The results show that, blank and 3 cm soil respiration rate in general-02：00-04：00 ascend to the peak day, 9 cm soil respiration rate-08：OO-at 10：00, rising to a peak of the day, 18 cm soil respiration rate village in writing of the day to rise to 18：00 peak. In the same water conditions, 3 cm a date＂ iree, 9 cm a date tree and the 18 cm presents the smaller diameter level soil respiration rate of the law of the stronger. From the soil breathing Q10 is worth out, and the soil respiration rate of temperature sensitive degree with diameter of the village level increases present a descending trend.