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结合野外采样和室内分析,对库布其8种防护林0~100 cm的土壤水分和0~60 cm的土壤养分进行分析.0~100 cm土壤水分随着土层深度逐渐增加,土层和防护林类型均对土壤水分有极显著影响,8种防护林样地的土壤水分从大到小依次为:旱柳+小美旱扬>旱柳>沙枣+沙柳>沙枣>速生杨>速生杨+羊柴>拧条>羊柴.对0~60 cm的土壤养分分析表明,土层对7个土壤养分指标均无显著影响,表土层0~10 cm土壤养分高于10~60 cm土层的,表现出土壤养分的表聚效应.防护林类型对7个土壤养分指标均有极显著影响,柠条和旱柳样地中土壤养分较高,羊柴样地中土壤养分相对较低.结果表明:旱柳、旱柳+小美旱杨和柠条等防护林对土壤的改良作用较好,土壤有较好的水分和养分条件,林下草本植被的物种多样性和盖度都较高,羊柴和速生杨防护林表明对流沙的改良作用较差,土壤水分和养分较低,林下草本植物的物种多样性和盖度均较低.
According to the field sampling and indoor analysis, the soil moisture at 0-100 cm and the soil nutrients at 0-60 cm in 8 kinds of shelterbelts in Kubuqi were analyzed. The soil moisture in 0-100 cm soil layer increased with the depth of soil layer, The soil moisture of the eight shelterbelts plots were as follows: Salix matsudana + Xiaoliangan> Salix matsutake> Sassafras tsumu> Sassafras tsumu> Sassafras tsumu> Fast-growing poplar> Fast-growing poplar + Sheepwood> twigs> sheepwood.Analysis of 0 ~ 60 cm soil nutrients showed that the soil had no significant effect on the seven soil nutrients, and the 0-10 cm soil nutrients in the topsoil were higher than those in the 10-60 cm soil layer , Showing the phenanthrene effect of soil nutrients.The types of shelterbelts all had extremely significant effects on soil nutrient indexes of seven soils.The soil nutrients of Caragana korshinskii and Salix matsutake were higher and the soil nutrients of Sheepwood were relatively lower.Results The results showed that: the shelterbelts such as Salix matsutake, Salix matsudana and Caragana korshinskii and Caragana korshinskii had a better soil improvement effect, the soil had better water and nutrient conditions, the species diversity and cover of the herbaceous plants under the forest were higher, The shelterbelts of Populus tomentosa and Populus deltoides showed that the improvement of runoff sand was poor, the soil moisture and nutrients were low, Species diversity and coverage are low.