摘要
[目的]黄河沿岸地带是水土流失最严重的地区之一。研究沙区河岸固沙林带不同带间距下的土壤水分和植被群落特征,确定最优配置模式下的带间距,为建设沙区河岸固沙林带行带式造林提供依据。[方法]以内蒙古自治区鄂尔多斯市达拉特旗西柳沟不同带间距行带式固沙林为研究对象,对带间距8,16,22,28m的固沙林样地进行土壤取样和植被调查,统计不同带间距固沙林带的带间土壤物理性质以及植被群落特征,并分析土壤水分与植被间的相关性。[结果]①不同行带式固沙林中的土壤水分与植被指数整体上均随带间距增大而提升。②各样地带间0—100cm范围内不同土层土壤水分也随水平间距增加而升高,至11m后变化趋于稳定。③各样地带间土壤水分均与植被指数大体呈极显著正相关,但均匀度指数与丰富度指数有所差异。带间距越大,植被恢复效果越好,带间距22m时约达峰值。[结论]以低覆盖度行带式固沙林进行沙地治理时,植被恢复效果随带间距增大而增长,但带间距并非越宽越好。22m带间距的行带式固沙林带间植被恢复效应最佳,对沙地的近自然修复效果最优。
[Objective]The coastal area of the Yellow River is one of the areas experiencing the most severe soil and water loss.The soil moisture and vegetation community characteristics of riparian-sand-fixing forest belt in sandy areas were studied under different zone spacing,and the belt spacing under the optimal allocation mode was determined in order to provide the basis for the construction of row and belt afforestation of riparian sand-fixing forest belt in sandy areas.[Methods]The study was conducted on sand-fixation forest belts with different band spacings at Xiliugou,Dalat Banner,Ordos City,Inner Mongolia.Soil sampling and vegetation surveys were carried out in the sand-fixation forest sample plots with different band spacings of 8 m,16 m,22 m,and 28 m.Soil physical properties and vegetation community characteristics were analyzed.The correlation between soil moisture and vegetation was also determined.[Results]①The soil moisture and vegetation index of different sand-fixation forest belts increased with increasing band spacing.②The soil moisture for different soil layers in the 0-100 cm soil layer in various zones of the band spacing also increased with the increasing horizontal spacing,and the change tended to be stable after 11 m.③Soil moisture in different zones was positively correlated with vegetation index in general,but the evenness index and richness index were different.The greater the band spacing,the better the vegetation restoration effect,and the peak value of the restoration effect was approximately reached when the band spacing was 22 m.[Conclusion]The vegetation restoration effect increased with increasing sand-fixation forest belt band spacing when sandy land was treated with a low coverage row-type sand-fixation forest,but it is not always that the wider the band spacing,the better the vegetation restoration effect.The 22 m band spacing had the best vegetation restoration effect of all of the row-type sand-fixation forest band spacings,and the near-natural restoration effect on sandy land was the best.
作者
黄伟
杨光
马勇
刘一
Huang Wei;Yang Guang;Ma Yong;Liu Yi(College of Dessert Control Science and Engineering,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018,China;Key Laboratory of Desert Ecosystem Conservation and Restoration,State Forestry and Grassland Administration of China,Hohhot,Inner Mongolia 010018,China;Wuhai Water and Soil Conservation Workstation,Inner Mongolia 016000,China;Hulunbuir Water Resources Development Center,Hulunbuir,Inner Mongolia 021000,China)
出处
《水土保持通报》
CSCD
北大核心
2024年第1期9-19,共11页
Bulletin of Soil and Water Conservation
基金
内蒙古自治区科技重大专项“沙地生态系统近自然修复技术研究及产业化示范”(2019ZD003)
内蒙古自治区科技计划“黄土丘陵沟壑区智慧水土保持技术”(2021GG0070)。
关键词
沙区河岸
带间距
土壤水分
植被群落
固沙林带
sandy bank
band spacing
soil moisture
vegetation community
sand-fixing forest belt
