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在典型草原区多伦县水泉小流域选取典型沟道,在沟道内从沟头到沟口选择3个坡面进行土壤采样,研究沟道内坡位对草地生长状况及土壤性质空间异质性的影响,结果表明:①含水率在坡底最低,但变化幅度最大,且越靠近沟口含水率越低。②坡位对土壤容重的影响与坡面在沟道的位置有关,其中坡底土壤容重比其他坡位明显偏高。③对于有机质和全氮,坡位对两者的影响完全一致,呈现一定的规律。坡位对全磷和全钾的影响各不相同,其中坡位对全钾的影响较小,可能与土壤自身的结构和沟道侵蚀有关。
A typical channel was selected in Shuimian catchment in Duolun County, a typical steppe area. Three slopes were selected from Gountou to Mizoguchi for soil sampling. The spatial heterogeneity of grassland growth and soil properties was studied The results showed that: (1) The water cut was the lowest at the bottom of the slope, but the change range was the largest. The influence of slope position on soil bulk density is related to the location of the slope in the channel, in which the bulk density of the slope bottom soil is obviously higher than other slope positions. ③ For the organic matter and total nitrogen, slope position exactly the same for both, showing a certain law. The effects of slope position on total phosphorus and total potassium were different, and the effect of slope position on total potassium was small, which may be related to soil’s own structure and channel erosion.