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农田景观中非农生境对生物多样性保护、耕地多功能性和农业产量等具有重要影响.本文选择中国城市化过程中生物多样性保护与农业高产需求相互冲突的典型地区沈阳市沈北新区为研究区采用信息熵模型划分为城市近郊、城市边缘区和乡村区域采用手捡法和Baerrnann法调查,鉴定了节肢动物和土壤线虫,并通过线性回归分析确定了非农生境类型、结构及数量与土壤动物的协同关系.结果表明:沈北新区农田景观的非农生境斑块面积均小于1 hm~2.随着与城市中心距离的增加,非农生境类型和比例逐渐增加,面积比例呈倒“U”型变化,斑块数量比例从8.6%增加到27.8%;土壤动物个体数呈现“U”型变化物种量无明显变化规律.乡村和城市近郊的非农生境斑块数量比与土壤动物个体数呈正向协同关系,城市边缘区无明显规律;非农生境面积比与土壤动物个体数均呈反向协同关系;非农生境斑块数量比和面积比与土壤动物物种量均无明显协同关系.
Non-agricultural landscapes in farmland landscape have an important impact on the conservation of biodiversity, multi-functionalities of farmland and agricultural output, etc. This paper selects the typical areas where the conflict between biodiversity conservation and high-yielding agriculture needs during the process of urbanization in Shenyang: The information entropy model is divided into urban suburbs, urban fringe areas and rural areas by hand picking method and Baerrnann method. The arthropods and soil nematodes were identified in the study area. The types, structure and quantity of non-agricultural habitats were determined by linear regression analysis. Soil animals.The results showed that the non-agricultural habitat patch area of farmland landscape in Shenbei New District was less than 1 hm ~ 2, with the increase of the distance from urban centers, the types and proportions of non-agricultural habitats increased gradually, “U” type and the number of plaques increased from 8.6% to 27.8%. There was no significant change of species number of soil animals in “U” type. The number of non-agricultural plains in rural and urban suburbs And the number of individuals in soil fauna showed a positive synergistic relationship with no obvious rule in urban fringe areas. The area ratio of non-agricultural habitats was negatively synergistic with that of soil fauna. Agricultural habitat patch number and area no obvious synergies with soil animal species than the volume.