古尔班通古特沙漠南缘不同密度人工梭梭林改善小气候效应研究

通过对古尔班通古特沙漠南缘不同密度人工梭梭林的林内风速、气温、相对湿度、土壤含水量等指标的观测，就不同密度人工梭梭林改善小气候效应进行了研究，结果表明：人工梭梭林保留密度为1111株？hm^-2与833株？hm^-2时，改善小气候效应与高密度梭梭林相当；保留密度为500株？hm^-2时，改善小气候效应略有降低，但显著提高了土壤含水量，有利于抑制梭梭林的衰败退化；保留密度为278株？hm^-2时，改善小气候效应严重降低，土壤含水量提高不显著。

Improvement Effect on Microclimate of Artificial Haloxylon ammodendron forest under Different Densities along the Southern Margin of Gurbantunggut Desert

To study the improvement effect on the microclimate ,the wind speed ,air temperature ,relative humidity and soil water content under different densities of artificial H aloxylon ammodendron forest in the southern margin of Gurbantunggut desert were determined . The study results showed the effect of reserved density of artificial H aloxylon ammodendron forest under 1 111 plant ？hm - 2 and 833 plant ？hm - 2 was equivalent to that under the high density ;the improved effect to the microclimate was decreased slightly under 500 plant ？hm - 2 of reserved density , but soil water content was significantly increased which was conducive to prevent the H aloxylon ammodendron for-est from degradation ;it was severely reduced the improved effect to the microclimate under 278 plant ？hm - 2 of re-served density ,while soil water content was not obviously improved .