不同带间距对沙区河岸固沙林带的带间土壤水分和植被群落特征的影响
Effects of Different Band Spacings of Riparian Sand-fixation Forest Belts on Soil Moisture and Vegetation Community Characteristics in Riverbank Sandy Areas
黄伟 1杨光 1马勇 2刘一3
作者信息
- 1. 内蒙古农业大学沙漠治理学院,内蒙古呼和浩特 010018;荒漠生态系统保护与修复国家林业和草原局重点实验室,内蒙古呼和浩特 010018
- 2. 乌海市水土保持工作站,内蒙古乌海 016000
- 3. 呼伦贝尔市水利事业发展中心,内蒙古呼伦贝尔 021000
- 折叠
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8,16,22,28 m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0-100 cm范围内不同土层土壤水分也随水平间距增加而升高,至11 m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22 m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.22 m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.
Abstract
[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 8,16,22,and 28 m.Soil physical properties and vegetation community characteristics were analyzed.The correlation between soil moisture and vegetation was also determined.[Results]① The soil moisture and vegetation index of different sand-fixation forest belts increased with increasing band spacing.② The 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 11m.③ Soil 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.
关键词
沙区河岸/带间距/土壤水分/植被群落/固沙林带Key words
sandy bank/band spacing/soil moisture/vegetation community/sand-fixing forest belt引用本文复制引用
基金项目
内蒙古自治区科技重大专项(2019ZD003)
内蒙古自治区科技计划(2021GG0070)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据