梭梭林小气候初步研究

A PRELIMINARY STUDY ON MICROCLIMATE OF CAKCAYR FOREST

在复盖度３０％的梭梭林内与旷野分别设观测点，５月份１个月同时观测结果指出：①辐射强度：２ｍ高处林内为旷野的９１．１％，近地表处林内为旷野的５７．４％。②地温：日较差林内低于旷野，降温天林内高于旷野。③气温：上下层平均气温林内高于旷野，地表层早晚高于旷野，中午低于旷野。④相对湿度：白天林内比旷野高３％，夜晚低于旷野。⑤水面蒸发量：林内比旷野低３９％。⑥风速：１．５ｍ高处林内比旷野低５３．７％，０．１ｍ高处林内比旷野低６８．９％。

Making observations within forest with 30%of coverage percentag and in wilder-ness at the same time, the one months results in May showed as follows。Radiation intensity:At 2m high within cakcayr forest,the value is 91.1%of wilderness;Near the soil surface within forest is 5 7.4%of wilderness。Temperature at the soil surface : Daily range within forest in layer of 0～25cm depth islower than that of wildemess;During the cooling days,the ground temperatures in every lay-er are higher than that of wilderness in a whole day。Air temperature:Mean air temperature of upper layer(2～3m high)and lower layer(0. 1m high)within forest is higher than that of wilderness;Air tempereture near the soil sur- face within forest is.higher than that of wilderness in the morning and in the evening,butlower at noon or so。Relative humidity:RH within forest is 3%more than that of wilderness at daytime,it islower at night。Evaporation of water surface:Within forest evaporation is 3 9%lower than that ofwilderness。Wind speed:At l.5m high within forest.It is 53.7%lower than that of wilderness;At0.1m high within forest,it is 68.9%lower than that of wilderness。