| Land resources are the core of the survival and development of human society, as an important part of land resources, farmland landscape is losing landscape ecological service function because of the unreasonable development and utilization. So, it is the mission of every scholar of land resources to evaluate the quality of the land and landscape, and to maintain the health of the farmland landscape.According to the research achievements at home and abroad, taking Huailai County, whose farmland landscape features is obvious, as the research object, this paper put forward a kind of research thinking that combined farmland landscape classification and evaluation of the landscape ecological servicess using landscape ecology and other related theories, in order to reveal the difference on ecological services between types of farmland landscape.First of all, this paper carried on a farmland landscape classification research in Huailai County using the integrated analysis of qualitative and quantitative research methods. Based on the analysis of the farmland landscape features, the farmland landscape is divided into 1 landscape classes, 5 subclasses and 50 landscape units through the farmland landscape scope definition, dominant factor analysis, classification index selection, classification framework construction and other process. Secondly, based on the classification results, taken landscape unit as the evaluation unit, this paper selected 15 indicators to build the index system from 2 aspects of ecological aesthetics and ecological services on the view of farmland landscape ecological servicess; determined the index weights by integrating AHP and coefficient of variation method and then made a ecological servicesal assessment to every landscape unit. According to the results, it made recommendations for farmland landscape construction and maintenance from 3 aspects, namely optimizing planting types in connection with the ecological services difference between each landscape unit, improving land management techniques, and using high-quality resources to develop multifunctional agriculture. Finally, this paper got the following conclusions:(1) Landscape ecological servicess evaluation based on landscape classification can not only make up the weaknesses that cannot be quantitatively analyzed of each landscape type, but also can ensure the internal evaluation object to keep a certain homogeneity at the same time, so that the evaluation can be more objective.(2) the classification method taking qualitative and quantitative factors into account can be more objective to distinguish the differences in the form of landscape characteristics and functions between landscape area, and to adjust and improve the results combine with field surveys, the classification results is consistent with the actual situation of farmland landscape in Huailai County, the strength degree of ecological services between landscape units are obvious, and it is suitable for farmland landscape classification in Huailai County.(3) Through landscape classification and ecological services evaluation, the results showed that farmland landscape ecological services varied widely, which obtained a score of 0.1724-0.6527, rendering an obvious gradually weakening trend from the "V" type basin to the north and south sides of central hills. There are 4 landscape units whose ecological services score located in the "highest" level, with the minimum number but prominent landscape ecological services. In addition, landscape units of ecological services significantly decreased with the increase of elevation and slope in the overall, every subclass of ecological services showed a decreased trend of paddy field, irrigated field, orchard and dry land. Finally, this paper put forward relevant proposals for farmland landscape maintenance and construction in Huailai County. |
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