Vegetation Change In Heilongjiang Province And Its Response To Climate

As the human on the natural reform continued to deepen, global warming has been recognized, climate change has caused a variety of ecological problems. In the land surface ecosystem, the most obvious effect of climate change is the surface vegetation. The change of surface vegetation has a direct impact on the human living environment, so the study of the relationship between vegetation and climate factors has an important role in the future development of human society. Heilongjiang Province as the most northern provinces, the climate is cold and dry, is the north boundary of the growth of many species, the response of the vegetation to the temperature and precipitation is more sensitive. In this paper, on the basis of domestic and foreign research, refer to the latest research results, such as RS, GIS platform as a means of processing, remote sensing using monadic regression and correlation, partial correlation analysis of statistics principle, the characteristics of NDVI changes, NDVI and climate factor response relationship. Results show that:(1) from 2000 to 2012, Heilongjiang province, the NDVI is slowly increase volatility, but overall growth is not obvious, the growing season NDVI in 2010 with an average annual NDVI appear the opposite trend, NDVI changes in spatial heterogeneity, significant changes in the big XiaoXing’an Ling, Wondersun veins, ZhangguangcaiLing, master ridge mountain woodlands and qiqihar in daqing city areas such as NDVI significantly increased, while a small portion of XiaoXing’an Ling region and north Sanjiang plain NDVI is reduced significantly.(2) the difference of NDVI in different types of vegetation were different, and the growth of NDVI was significantly increased during the 13 years, and the growth of NDVI in grassland was significantly higher, and the NDVI of woodland growth season decreased. Average annual NDVI in three planting forest land, cultivated land, grassland types are on the rise.(3) the spatial heterogeneity of NDVI and temperature in the growing season of 13 years in Heilongjiang Province, the NDVI and temperature of forest land in mountainous areas was positively correlated with the NDVI and temperature of forest growing season in northeast part of Greater Khingan Range province. The NDVI and temperature in the growing season of cultivated land and grassland were negatively correlated, and the more negative correlation in southwest china.(4) during the 13 years in Heilongjiang Province growth season NDVI and precipitation related characteristics and temperature is just the opposite, the mountain forest growth season NDVI and precipitation was negatively correlated, southeastern Wandashan area forest growth season NDVI and precipitation negatively correlated most significantly, in most parts of the country, P < 0.05 significant inspection experience. The growth of cultivated land and grassland was positively related to the precipitation of the growing season NDVI, and the correlation degree was more obvious, and the significance test of most of the p<0.05 in the southwest part of china.In the 13 years, the NDVI and temperature of the NDVI and the temperature of the years of the control over the years in Heilongjiang province were positively correlated with the spatial difference, and it was positively correlated with the temperature in the region of Greater Khingan Range, and the Greater Range region was the strongest. A low negative correlation between southeast Wandashanarea. Land and grassland growing season NDVI were negatively related to temperature, and the NDVI of cultivated land in Suihua was positively correlated with temperature in Suihua city.In the 13 years, the correlation between NDVI and precipitation in Heilongjiang Province during the period of years of controlling temperature variation was positively correlated with the spatial difference, and the NDVI and temperature in the region of the middle area of Greater Khingan Range province were negatively correlated with the temperature. The NDVI and precipitation of cultivated land and grassland were positively correlated with the rainfall, and the correlation between NDVI and precipitation was the most significant in the two cities of Suihua and Daqing, after the exclusion of temperature.