Studying On The Climate Suitability Of Winter Wheat In Jiangsu Province And Its Application

Changes in climate and environment will inevitably bring about changes in agricultural ecological environment.Jiangsu Province is one of China’s main winter wheat (Triticum aestivum Linn) growing areas, under the background of climate change, to discuss climate suitability degree of Jiangsu winter wheat growth development and yield has a strong practical significance. The membership functions to construct the climatic suitability model, on 12 sites in Jiang Su Province winter wheat at different growth stages and the whole growth period of the suitable degree is calculated and analysis the spatial and temporal changes. According to during the growing period of Winter Wheat by freezing, drought and rainy weather disaster index calculated by disasters and climate elements of Jiangsu Province and combined with analysis. The purpose is to provide a theoretical reference for the sustainable development of agricultural regional environmental management and agriculture.The main work is as follows:1. The construction of climate suitability model for description and analysis of Winter Wheat in Jiangsu Province climate suitability degree. In order to avoid in each growth stage of single factor climate suitable possibility degree is small or zero lead and winter wheat meteorological yield appear larger deviations from, use multiplicative model to express the climate suitability of different growth stages of winter wheat, the effect is satisfied.2. The climate suitability of Winter Wheat in Jiangsu province is better, the change is relatively stable, and the temperature suitability degree, the precipitation suitability and the climatic suitability are weak, and the sunlight suitability shows a slight decreasing trend year by year.3. From suitability distribution point of view, in southern Jiangsu Sunshine suitable degree is low, Northern Jiangsu area precipitation suitability degree is low, the temperature suitability degree is generally high and climate suitability of the gap is not large. Precipitation in southern Jiangsu Sunshine of winter wheat has great influence in the northern area of Jiangsu Province is a key factor influencing the production of Winter Wheat in the area; and eastern coastal areas of light, temperature and precipitation resources are relatively abundant, can satisfy the growth of winter wheat, suitable climate high degree.4. The three key elements of Jiangsu Province winter wheat of light, temperature and water suitability and different growth period were suitable for the detailed analysis, the growing stage of winter wheat suitable degree of change are obtained, which leads to the conclusion that the negative effects of Jiangsu Province winter wheat suitable lower growth period at the seedling and tillering stages, mainly by in suitable temperature of components influence caused the period of winter wheat climate suitability is lower. Therefore, during this period should be attention to low temperature and freezing of winter wheat growth development and yield formation.5. Entered in the winter cold during overwintering in 5. In order to better understand and recognize the negative impact, we further analyze the winter wheat freeze injury index, combined with the calculation of Winter Wheat in different periods of cold accumulated temperature, winter wheat seedling to tiller and tiller wintering and reviving the cold temperature, can be seen the Ganyu and Xuzhou (Jiangsu) cold accumulated temperature is bigger, Nantong, Kunshan and Dongshan (on behalf of the Soviet Union, the southern Jiangsu) accumulated temperature is smaller, and the calculation of the winter wheat freeze injury index results at the same time period is consistent. That winter wheat emergence of low temperature damage period prior to hibernation and end after the dormancy, late autumn and early winter and late winter and spring.6. Jiangsu Province winter wheat growth in seedling and Tillering Stages may drought effects. At this time of the humid index lower effect on winter wheat growth; winter wheat in Jiangsu Province by a certain degree of influence of continuous rain, which in the south part of Jiangsu Province even rainy times more by continually cloudy rain effects are larger and even rainy and the amount of precipitation and sunshine was significantly correlated.