CAI Xudong,ZHOU Yiwen,LIU Yaojun,et al.Evaluation on Comprehensive Ecological Benefit of Different Tillage Measures on Sloping Land in Red Soil Area of South China[J].Research of Soil and Water Conservation,2020,27(05):281-287.
南方红壤区坡耕地不同耕作措施综合生态效益评价
- Title:
- Evaluation on Comprehensive Ecological Benefit of Different Tillage Measures on Sloping Land in Red Soil Area of South China
- 文章编号:
- 1005-3409(2020)05-0281-07
- Keywords:
- sloping farmland; cultivation measures; ecological benefits; analytic hierarchy process; entropy weight method
- 分类号:
- S157
- 文献标志码:
- A
- 摘要:
- 合理评价南方红壤区坡耕地不同耕作措施综合生态效益是进一步评价其经济效益和社会效益的必要条件,可为该地区耕作方式优化提供科学依据。针对已有研究对南方红壤坡耕地区耕作方式评价存在评价指标片面和评价系统粗略等问题,以裸露措施(CK)为对照,以顺坡耕作(DT)、顺坡+植物篱(DT+HR)、横坡耕作(CT)和稻草覆盖措施(SM)为研究对象进行了效益评价,评价指标体系通过层次分析法—熵权法确立了保持水土效益(B1)、控制农业面源污染效益(B2)和提高土地生产力(B3)3个效益指标类型以及具有代表性的8个评价指标。结果表明:以农民普通耕作(主要是顺坡耕作)为主的南方红壤区,稻草覆盖措施能明显地减少土壤侵蚀量、控制养分流失,各措施效益大小为顺坡耕作<顺坡+植物篱<横坡耕作<稻草覆盖; 不同耕作措施的综合生态效益和提高土地生产力效益均较顺坡耕作明显提升,其中稻草覆盖措施最高; 不同措施效益指标较顺坡耕作增幅也不同,其中保持水土效益、控制农业面源污染效益分别增加66.3%～87.7%,36.2%～45.4%。评价结果表明在南方红壤区坡耕地提倡稻草覆盖的耕作措施可以有效提高当地农用地的生态效益。
- Abstract:
- Rational evaluation of comprehensive ecological benefits of different tillage measures on slope-farmlands in southern red soil region is a necessary condition for further evaluation of economic and social benefits, which can provide scientific basis for the optimization of farming methods in this area. Aiming at the problems of one-sided evaluation index and rough evaluation system existed in the evaluation of tillage methods in slope-farmlands area of red soil in South China, we set bare land measure as control(CK), and evaluated the benefits of downslope tillage(DT), hedgerows with downslope tillage(DT+HR), contour ridge tillage(CT)and straw mulch(SM). The evaluation index system was established by analytic hierarchy process-entropy weight method, and three benefit indicators of soil and water conservation(B1), agricultural non-point source pollutant control(B2)and land productivity enhancement benefits(B3), and eight representative evaluation indicators. The results showed that: in southern China where the traditional tillage, ridge down and up, is adapted by local farmers, soil erosion decreases remarkably by SM and nutrients loss can be controlled; different type benefits increase in the order: DT<DT+HR<CT<SM; there is a significant increase in index for comprehensive ecological benefits and land productivity of different tillage measures compared to DT. Among the measures, SM benefit is the highest, the increase in different ecological benefits varies from that in DT, B1, B2 increase by 66.3%～87.7%, and 36.2%～45.4%, respectively. The evaluation results show that SM can effectively improve the ecological benefits of local agricultural land in the southern red soil slope-farmlands area.
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备注/Memo
收稿日期:2019-11-18修回日期:2019-12-04
资助项目:国家重点研发计划项目(2017YFC0505401); 公益性行业(农业)科研专项(201503106)
第一作者:蔡旭东(1996—),男,贵州铜仁人,硕士研究生,主要从事水土保持与环境生态研究。E-mail:840459149@qq.com
通信作者:李朝霞(1976—),女,湖北丹江口人,博士,教授,主要从事土壤侵蚀机理等方面研究。E-mail:zxli@mail.hzau.edu.cn