KANG Peipei,ZHA Xuan,LIU Jiaming,et al.Analysis of Influence of Different Vegetation Planting Patterns on Soil Erosion on the Red Soil Slope[J].Research of Soil and Water Conservation,2016,23(04):15-18,22.
不同植被种植模式对红壤坡面侵蚀影响试验研究
- Title:
- Analysis of Influence of Different Vegetation Planting Patterns on Soil Erosion on the Red Soil Slope
- 分类号:
- S157.1
- 摘要:
- 采用天然降雨试验，研究南方典型花岗岩红壤坡面土壤侵蚀过程及不同植被种植模式、降雨量和降雨强度对红壤坡面产流、产沙的影响，定量研究了不同种植模式的拦沙蓄水效益，并建立了天然降雨试验下土壤侵蚀模型。结果表明：（1）相同降雨条件下，不同植被种植模式土壤侵蚀量的大小关系为：全裸露 > 条带播草 > 全覆盖 > 条沟播草；（2）当平均雨强为0.3 mm/min时，全覆盖种植模式优于条沟播草种植模式；当平均雨强为0.6 mm/min时，条沟播草种植模式的蓄水能力更显著；（3）土壤侵蚀量的粒径大小主要集中于 < 0.25 mm，是形成土壤侵蚀的主要原因，不同植被种植模式各个粒径泥沙含量集中在 < 0.25 mm，泥沙颗粒量大小总量的变化规律为：裸露模式 > 全覆盖种植模式 > 条带种植模式 > 条沟种植模式。通过对比得出条沟播草种植模式的拦沙蓄水效果最佳，以期为南方丘陵区治理水土流失提供参考。
- Abstract:
- Through natural rainfall experiment, soil erosion process on the the typical granite red soil slope and influences of different vegetation planting patterns, rainfall and rainfall intensity on red soil slope surface runoff and sediment yield were analyzed, the effect of different planting patterns on the sediment and water storage efficiency and soil erosion were quantitatively examined under natural rainfall, and the test model was developed. The results show that:(1) under the same rainfall condition, different vegetation planting patterns of relationship between the size of the soil erosion is:the naked model > full cover planting patterns > strip planting patterns > ditch planting patterns; (2) when the average rainfall intensity is 0.3 mm/min, the whole cover planting pattern is superior to the furrow sowing grass planting patterns; when the average rainfall intensity is 0.6 mm/min, a trench planting grass planting patterns of water storage capacity is more significant; (3) the particle size of eroded soil is mainly focused on the less than 0.25 mm, it is the main cause of soil erosion and land degradation, particle sizes of sediment under different vegetation planting patterns are dominated by the sizes < 0.25 mm, the changing rule of the total amount of sediment particle size is as follows:the naked model > full cover planting patterns > strip planting patterns > ditch planting patterns. The effect of furrow sowing grass planting patterns on sediment reduction is the best, which can provide example for management of soil and water loss in the southern area.
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备注/Memo
收稿日期:2015-08-03;改回日期:2015-09-13。
基金项目:国家科技支撑计划项目“强度侵蚀区退化生态系统修复关键技术的集成与示范”（2014BAD15B02）
作者简介:康佩佩(1992-),女,陕西榆林人,在读硕士研究生,主要研究方向:土壤侵蚀和水土保持。E-mail:kpp_666@163.com
通讯作者:查轩(1961-),男,陕西咸阳人,研究员,博士生导师,主要研究方向:水土保持与生态恢复。E-mail:xzha@fjnu.edu.cn