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

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

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1 111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。

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 .