关键词: 可溶性糖, 可溶性糖

Abstract: To comprehensively understand urban green space distribution of Meilie District, Sanming City, the visual interpretation technique was used in extracting urban greenland information, and the spatial structure and spatial distribution of urban greenland were also studied by the method of remote sensing coupled with geographical information system technique. The results showed that the green rate, green density, average fractal dimensions, contagion/aggregation, green diversity index and green evenness index of Meilie were 23.58%, 147.4776 individual/hm2, 1.5840, 72.7777, 0.9494 and 0.4879 respectively. The greenland area of six types ranked from high to low as follows: public greenbelt (PU)>residential greenbelt (R)> traffic greenbelt (T)> public construction greenbelt (PC)>protective green buffer space (PR)> agriculture greenbelt (A). In terms of plaque, Meilie green plaque was dominated by medium-sized plaques (45.54%) andⅡmedium-sized plaques (116.9398 hm2) >Ⅲmedium and large plaques (72.5536 hm2) >Ⅳlarge plaques (51.9676 hm2 ) >Ⅰsmall plaque (15.3127 hm2). Eight landscape fragmentation indexes was used to principal component analysis, and the cumulative variance contribution rate of four principal components after dimension reducing processing was 99.782%. The law of green space fragmentation level to different Greenland types was R> PC> PR> T> A> PU. In terms of spatial relationships, the plaque of R, A, T and PR was continuous and compact, while the plaque of PC and PU was relatively isolated. These results may guide Sanming City to green, recycling, low-carbon development, and it’s also may provide a scientific basis for building a rational urban green structure and ecological security pattern.