Study Of The Mutual Effect Between Sowing Date And Density In Base Of "Three Techniques In Advance" In Fallow Period

The experiment was carried out in wenxi, Shanxi Agricultural University from2012-2013.A field experiment to study the supporting dryland wheat farming fallow period Sowing amount of0-300cm soil layer moisture change, Agronomic traits, plant nitrogen uptake and accumulation, yield and grain protein and its components, trying to explore in the "three early", based on the amount of leisure lives are different sowing sowing time to explore the "three early" best of Sowing raise the amount of soil moisture, provide a theoretical basis for the high yield and quality. The main results are as follows:(1) Dryland wheat farming fallow period and can improve the0-100cm160-240cm soil layer soil water storage, winter, booting, flowering and maturity of the0-300cm soil water storage, winter0-260cm300cm soil and soil water storage capacity each, jointing60cm,80cm,160cm,300cm soil water storage capacity of each soil, booting in addition to40cm,60cm,100cm soil water storage capacity of each soil soil, the flowering period in addition to100cm each soil layer storage capacity,160-200cm,260-300cm soil layer, the maturity in addition to20cm,260cm external storage capacity of each soil layer, thereby significantly improving the water use efficiency can be improved dryland wheat maturity proteome of content, protein content and protein yield, panicle, grain weight, thus improving the actual yield dryland wheat, and higher order modes subsoiler plowing mode. Yield and grain protein and its components, trying to explore the "three early", based on the fallow period differently Sowing amount to explore the "three early" Best of Sowing improve the soil moisture content for high yield and quality provide a theoretical basis.(2) Dryland wheat fallow period after subsoiling, different amount of Sowing performance:supporting early sowing sowing rate of67.5kg/ha, the sowing supporting90kg/ha,112.5kg late sowing supporting/ha can be increased each birth of0-300cm soil water storage capacity, soil water storage capacity at each growth stage120-180cm soil, thereby improving water use efficiency; dryland wheat can also improve each growth stage, plant height, leaf area index, each growth period dry biomass and reviving and jointing stage group dynamics, and ultimately increase the protein content of dryland wheat grain and its components, increased production; may also increase the amount of accumulated nitrogen plants at different growth stages, each organ nitrogen accumulation and maturity the proportion of grain, nitrogen absorption intensity at different growth stages, thereby improving dryland wheat before flowering and after flowering to grain contribution of nitrogen, and ultimately improve the nitrogen use efficiency and nitrogen production efficiency, and supporting the broadcast90kg/ha of the best.In short, the next three advance technology dryland wheat cultivation conditions, the use of deep pine cultivation measures, and select the next sowing conditions in supporting the sowing rate of90kg/ha, in favor of leisure and Storage of water, promote the absorption of nitrogen and plant operation, increasing the protein content and yield, and ultimately improve the efficiency of water use efficiency and nitrogen.