The Effects Of Different Fertilization And Cultivation Models To Grain Yield, Soil Water Content And Nutrient

Since water deficiency and unreasonable nitrogen (N) fertilization are thekey factors impacting crop production in dryland area of Gansu, it is of greatimportance to work on fertilization and cultivation management for increasingcrop yield, water and fertilizer efficiency in this area.According to Winter Wheat were operated in monoculture field experiment for2consecutive years at Gansu Academy of Agricultural Sciences of Dingxi experimental station. Researc-h effect on winter wheat yield,Water use efficiency, N uptake, residual nitrate-N after crop harvest and its leaching during summer fallow.The results showedthat:1,In this study, the optimization of production under fertilizer and planting modesof winter wheat and other agronomic traits do a measurement and analysis, yieldSunada mode and the whole film furrow planting pattern of winter wheat is higherthan other modes, higher than farmers mode about50%. Maybe yield between modes,the difference between the harvest index was not significant, positive correlationbetween biomass and yield, ha spikes between kernel weights also showed somecorrelation. Explains, Sunada mode and the whole film furrow planting patterns canimprove the utilization and absorption of winter wheat on soil moisture on soilnutrients, so as to achieve the purpose of increase in production.2, Optimizing fertilizer and planting modes, the yield of winter wheat significantlyimprove,0-200cm soil moisture increases, and the change is consistent between thevarious treatment trends, patterns and Sunada highest yield of winter wheat plantingfurrow pattern of the whole film, while growth period water consumption is also thelargest, but the increase in production volume growth of water consumption is greaterthan the amount of the increase, so the water use efficiency is increased.3, Soil water before sowing in the region, winter wheat fallow periods and fertilityand yield of precipitation has a good correlation. Each winter wheat fallow periodallows Sunada1mm rainfall patterns and0-200cm soil water storage capacity of thewhole film furrow planting patterns increase0.22mm and0.16mm,0-200cm pre-sowing soil water storage for every1mm, the coming year winter wheat yieldincreased34.83kg/hm2. Fallow period of winter wheat can be drawn per1mmrainfall patterns in the coming year can make sand fields of winter wheat productionincreased by7.7kg/hm2, can make the whole film furrow planting Winter Wheatproduction increased by5.6kg/hm2, described Sunada mode and the whole filmfurrow planting pattern in arid regions have very good water retention, and greatlyimproves the efficiency of water use.4, Sunada whole film furrow cultivation modes and can improve soil moisturejointing stage, promote soil nitrogen absorption of wheat, wheat fallow period, thewhole film ditches and sand field mode0-100cm soil nitrate accumulation increased83.2and86.2respectively. kg/hm2, providing absorption and utilization of wheat nextseason to avoid soil residual nitrate leaching to lower, in order to achieve high andstable yield.