库布其沙漠8种防护林的土壤水分特征

发布时间：2018-07-06 16:51

本文选题：七星湖 + 防护林配置　；参考：《草业科学》2017年12期

【摘要】：通过野外取样,对库布其沙漠七星湖旅游专线两侧8种防护林0-100cm土层深度的土壤水分进行测定,分析了不同防护林不同土层的土壤水分变化特征及变异系数,旨在了解和掌握库布其防护林的土壤水分特征及变异规律。结果表明,0-20、20-40、40-60、60-80和80-100cm 5个土层的土壤水分随着土层深度增加逐渐增加;5个土层的土壤水分变异系数分别为0.70、0.94、0.92、0.94和0.90,土壤水分的变异系数随着土层深度增加逐渐增大。8种防护林的土壤水分从高到低依次为旱柳(Salix matsudana)+小美旱杨(Populus popular's)混交林(9.31%)旱柳纯林(8.93%)沙枣(Elaeagnus angustifolia)+沙柳(Salix psammophila)混交林(5.69%)沙枣纯林(3.31%)速生杨(Populus spp.)纯林(2.12%)速生杨+羊柴(Hedysarum laeve)混交林(1.90%)柠条(Caragana korshinskii)纯林(1.60%)羊柴纯林(1.02%);8种防护林的土壤水分变异系数为:柠条纯林(0.08)为弱变异,羊柴纯林(0.11)、速生杨纯林(0.11)、速生杨+羊柴(0.36)混交林和沙枣+沙柳混交林(0.39)为低等变异,旱柳纯林(0.64)、旱柳+小美旱杨混交林(0.67)和沙枣纯林(0.79)为中等变异。旱柳纯林、旱柳+小美旱杨混交林和沙枣+沙柳混交林是比较好的防护林配置,沙枣纯林和柠条纯林次之,羊柴纯林、速生杨纯林和羊柴+速生杨混交林3种防护林属于不理想的防护林配置。
[Abstract]:Through field sampling, the soil moisture of 0-100cm soil layer depth of 8 kinds of shelterbelts on both sides of Qixing Lake tourist special line in Kubuqi desert were measured, and the variation characteristics and variation coefficients of soil moisture in different soil layers of different shelterbelts were analyzed. In order to understand and master the soil moisture characteristics and variation law of Kubuqi shelterbelt. The results showed that the soil moisture of 5 soil layers increased gradually with the increase of soil depth, and the coefficient of variation of soil moisture was 0.700.94 and 0.90, respectively. The coefficient of variation of soil moisture increased with the increase of soil depth. The order of soil moisture in shelterbelt is Salix matsudana (Populus popular's) mixed forest (9.31%), willow pure forest (8.93%), Salix psammophila mixed forest (5.69%), jujube (3.31%) and fast growing poplar (Populus spp.) The coefficient of variation of soil moisture in pure forest (2.12%), mixed forest of Hedysarum laeve (1.90%), pure forest of Caragana korshinskii (1.60%), pure forest of Sheep wood (1.02%) and 8 kinds of shelterbelts were: Caragana korshinskii pure forest (0.08) was weak variation. The variation of pure forest (0.11), fast growing poplar forest (0.11), mixed forest of Yang Yang wood (0.36) and mixed forest of Salix jujuba (0.39) was low, while that of pure forest of willow (0.64), mixed forest of poplar (0.67) and pure forest of Zizyphus jujuba (0.79) was moderate. The pure forest, the mixed forest and the mixed forest are the better shelterbelts, the pure forest of Zizyphus jujuba and Caragana korshinskii is the second, the pure forest is the pure forest of Sheep wood, the second is the pure forest of Zizyphus jujuba and Caragana Caragana. The three kinds of shelterbelts of fast growing poplar forest and sheep wood fast growing poplar mixed forest are not ideal shelterbelts.
【作者单位】：中国科学院西北生态环境资源研究院沙漠与沙漠化重点实验室;甘肃省膜科学技术研究院;中国科学院科技战略咨询研究院;
【基金】：国家重点研发计划(2016YFC0500902) 国家科技支撑计划项目(2015BAC06B01) 甘肃省科技支撑计划(1504FKCA096)
【分类号】：S714

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