Studies On Effects Of Ecological Factors On Growth Of Maize And Establishment Of Climate Ecology Model And Appraisement System

In order to elucidate the relationship between growth of maize and ecological factors, this study analyze the yield of maize in different areas (SHihezi.Yili in Xinjiang,Taian in Shandong),adapting two varieties and different seedtime methods.This study researched the effects of light, temperature and water for growth of maize in different stages. Analyzed the reasons of high yield of maize in Xinjiang and the methods of promoting the output of maize, established the compositive model between growth of maize and ecological factor, discussing the limited climate factor. Using the GIS technique, established a adaptability judgment of maize variety system and MIS. The principal results are as follows:1. The model of light and temperature potential yield and evaluates the climate resource for maize1.1 The model of light and temperature potential yieldUsing agro-ecological zones (AEZ) approach and based on the trial data, set up some parameter, such as: Length of growing period(G), harvest index(CH), net dry yield revising coefficient (CN), LAI revising coefficient (CL), standard maximal dry mater productivity revising coefficient in clearness and cloudy condition(Yc ,Yo ),maximum rate of photosynthesis (Y), dry mater productivity of maize (Ym ),water requirements of the crop coefficient(Kc), yield response coefficient(Ky),rate of cloudy(F), actual potential evapotranspiration(Eta).potential evapotranspiration (Etm),the model as follows: Ymp=YxCLxCNxCHxGx K ( 1 -ET,S / ET.j) xlOOV. Y=F (0.8+0.01Ym) xYO+ ( 1-F) (0.5+0.025Ym) xYc (Ym>20kg/hm2-d) Y=F(0.5+0.025Ym)xYO+(l-F) (0.05 Ym) xYc (Ym<20 kg / hm2 d)1.2 The model of adaptability of maize growth and climate resource analysis.select the variables as : v={above 10 accumulated temperature(X|), Days of above (Xp, precipitation from Apr to Sep(X3),Relative humidity from Apr to Sep(X4), Average temperature of Jul (Xs), Hour of sunlight (X6) }, setup fuzzy model, appraised the climate resource.2. The climate-ecological model of accumulate rate of dry weight for maize apparatus2.1 The climate-ecological model of accumulate rate of leaf dry weight for maizeBase on seedtime date in Shihezi,set up the Logistic model between leaf dry weight and above 10癈 accumulated temperature, as follows: Y = a/(l+b*exp(-k*ET))A.b.k are parameter, Y.T is above 10癈 accumulated temperature is leaf dry weight. With Seedtime delay, accumulated temperature is up, accumulated rate of leaf dry weigh increasing . maximum weight of leaf when above 10癈 accumulated temperature is 3000 癈 ?d in 10th of Apr and 25th of Apr, the 25th of May is 2500'C.d. Accumulated rate of leaf dry weigh, YD 22 is high than SC704.2.2 The climate-ecological model of accumulated rate of stem dry weight for maize Based on seedtime date in Shihezi,set up the Logistic model between stem dry weight and above 10癈 accumulated temperature, as follows:y = a/(l + b*exp(-k* E T))A,b,k is parameter ,Y: dry weight of stem, ET: above 10癈 accumulated temperature,the result show : The dry weight of stem increase when accumulated temperature is up .2.3 The climate-ecological model of accumulated rate of male spike dry weight for maize Based on seedtime date in Shihezi,set up the model between stem dry weight and above 10癈 accumulated temperature, as follows:Y = a/(l+exp(b+c*U))a, b, c are parameter, Y is male spike dry weight is relative accumulated temperature.The result show : YD22 is high in Accumulate rate of male spike dry weigh .2.4 The model of accumulating rate of grain dry weight for maizeBased on seedtime date in Shihezi,set up the Richards model between stem dry weight and time , as follows: \V=A(l+Be'ky1/Na, b, k, n are parameter, A also is maximal dry mater of grain , w is dry weight of grain, t is Days after seedling. It can educe some parameter as follows , Tendency of growth (R ),date of maximal rate dry mater of grain(tmax.G), dry of weight at maximal rate of growth (Wmax.G) , proportion of A (%...