关键词: 育种, 育种

Abstract:

Coastal area is not only the intense human activity area but also ecologically sensitive areas, the land use change and ecological environment research should be strengthened. In this study, the study of Jiangsu coastal area, based on intensive use of land and ecosystem service value assessment model, the election of 2000, 2005, 2010, for the time section, estimated 19 coastal counties and cities the level of intensive use of land and the value of ecosystem services, analyzed its temporal and spatial variations, of coastal land use and ecosystem service value of intensive dialectical relationship. The results showed that: of the 19 coastal counties and cities in Jiangsu during the period of intensive use of arable land was significantly improved, and its average value, respectively, 0.181, 0.251 and 0.372, spatial structure change significantly. The farmland ecosystem service value fluctuated, the average land value of ecosystem services were 1.68×109 yuan, 1.58×109 yuan, 1.55×109 yuan, the value of northern land services downward trend, the rise in south trends in land value of ecosystem services were scattered areas of grade Ⅰ, Ⅱ grade zone to expand, Ⅲ grade state trend of decreasing area. The coastal areas of intensive land use and ecological service value was significantly negatively related to the study period the correlation coefficients were -0.700, -0.662 and -0.682, the correlation coefficient gradient law significantly related to the economically developed areas in southern Jiangsu coefficient was greater than in northern regions, the correlation coefficient decreased in southern trend, the rise tends to northern.