【摘要】：為了探討垂直帶氣候與植被垂直分布間關(guān)系,對(duì)祁連山排露溝流域北坡不同海拔梯度降雨和土壤水熱觀測(cè)數(shù)據(jù)進(jìn)行了分析,結(jié)果表明:1生長(zhǎng)季降雨量隨著海拔升高而增加,增加幅度為27.7 mm·(100m)~(-1);2海拔越高降雨天數(shù)占生長(zhǎng)季比值越高,2~10 mm的小降雨脈動(dòng)頻率隨著海拔升高而增加,小于2 mm的降雨脈動(dòng)在低海拔發(fā)生頻率較高,大于20 mm的降雨脈動(dòng)在高海拔發(fā)生頻率較高;3在表層0~10 cm和10~20 cm的土壤濕度每升高100 m增加幅度分別為0.027 m~3·m~(-3)和0.023 m~3·m~(-3),在表層0~10 cm和10~20 cm的土壤溫度每升高100 m降低幅度分別為0.32℃和0.28℃;4不同海拔上的土壤溫度沿土壤剖面降低,土壤濕度隨土壤深度先升高后降低,而土壤溫濕度隨生長(zhǎng)季先升高后降低。
[Abstract]:In order to study the relationship between climate and vertical distribution of vegetation in the vertical zone, the rainfall and soil hydrothermal data at different elevations on the northern slope of Pailugou basin in Qilian Mountains were analyzed. The results showed that: 1 the rainfall in growing season increased with the increase of altitude. The increase was 27.7 mm (100m) ~ (-1); (2) the higher the altitude, the higher the ratio of rainfall days to growing season. The frequency of small rainfall pulsation increased with the elevation of 2 ~ 10 mm, and the frequency of rainfall pulsation of less than 2 mm was higher at low altitude. The frequency of rainfall pulsation over 20 mm is higher at high altitude. (3) the increase of soil moisture for 10 cm and 10 ~ 20 cm in the surface layer was 0.027 mc3m-3 and 0.023 mc3m-3, respectively, when the soil moisture was increased by 100m, and the soil moisture increased by 0.027 mc3m-3 and 0.023 mc3m-3, respectively. The soil temperature decreased by 0. 32 鈩，

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