摘要
文章从论述研究区耕地环境特点入手,介绍了研究区耕地整理的主要措施,详细地分析了耕地整理对区域生态环境所产生的影响。研究表明,当前我国南方裸露岩溶峰丛洼地生态环境极为脆弱的情况下,进行耕地整理是改善其区域生态环境状况的有效途径。耕地整理能显著增加峰丛洼地地区有效耕地面积,使研究区有效耕地面积增加10.18hm2,增幅达46%;改善土壤理化性状,使土壤有机质含量平均增加58.17%,有效N、P、K含量平均增幅均超过80%,有效Cu、Zn含量平均为整理前的2.87倍;减少水土流失,整理后地表径流深度与土壤侵蚀模数均下降70.68%;降低以NO3-、总磷等为主要污染物的环境污染,降幅约40%;改善小气候并使区域耕地景观更富多样性,耕地整理的生态效益、经济效益显著。
This paper discussion on environmental characteristic of arable land in research area, introduces chief arable land consolidation measures and finally analyzes impact on regional eco-environment of arable land consolidation amply. The research shows that on condition that the eco-environment in karst peak-cluster depression in south China is rather fragile, arable land consolidation is an effective approach to improve it. Arable land consolidation can increase available proportion of arable land in karst peak-cluster depression evidently and it increases 10.18hm^2 in research area with an increasing range of 46%. It improves physical and chemical characters of soil, as the organic matter content increases by 58.17%, the available nitrogen, phosphorus and potassium contents increase with an average range of more than 80% and the available copper and zinc contents are 2.87 times compared to that is unconsolidated on average. It reduces water and soil loss while both the runoff depth and the soil erosion modulus decrease by 70.68% with consolidation. It weakens environment pollution which is mainly caused by NO3^-and total phosphorus at a range of about 40%, improves microclimate and makes regional arable land scenery more various. The benefits of arable land consolidation on both eco-environment and economy are prominent.
出处
《农业现代化研究》
CSCD
北大核心
2008年第3期338-342,共5页
Research of Agricultural Modernization
基金
国家“十一五”科技支撑计划课题“喀斯特峰丛山地脆弱生态系统重建技术研究”(2006BAC01A10)
岩溶地质研究所项目“西南岩溶生态环境水土流失研究及重点实验基地建设”(200707)
广西应用基础研究专项“广西岩溶石漠化区水土流失过程及其原因研究”(桂科基0731069)
关键词
耕地整理
生态环境
岩溶峰丛洼地
土地整理
果化龙何
amble land consolidation
eco-environment
karst peak-cluster depression
land consolidation
Longhe, Guohua
