Research And Model Of New Spring Wheat Cultivars Selection And High-yield Cultivation In Gansu Ying-Da Qing Wangchuan Newly-irrigated Area

The Ying-Da Qing wangchuan irrigated area is the largest potential production region of agriculture which is awaiting to be exploited.Due to its being newly-irrigated,it has been most suffered by fertile soil,few new cultivars for cultivation,backward culture technique and low yield of crops.In order to solve the above problems,the introduction and selection for new spring wheat cultivars,the high-yield cultivation techniques and spread prac(?)ce were conducted.Longchun 23 and Xinchun 8,were ultimately selected to be the two local adaptive cultivars through comparatively anal sizing growth feature,biological and economical traits among 13 high-quality spring wheat cultivars in this region.A regression quantitative model was founded for major farming culture measures and yield formation.Years of multi-combination four-factor and double-use to evaluate their effect on yield function,including basic seedlings number,380～400 thousand plants/667m~2,N application 9.8～11.3kg /667m~2,P application 5.0～5.2kg / 667m~2 and K application 4.7～4.9kg / 667m~2Selective comparison was performed by the frequency size and a reasonable program was built quantitatively for the compreherisive farming methods of high-yield production.Meanwhile,the results indicated that a single-peak curve link existed between yield and four above agricultural parameters.Among these factors,the application amount of N and K would be the most affected variables.Under a low application level of N,P and K,the interaction between density and N,P and K was positively correlated.Otherwise the interaction would be negative between them.This farming combination program was confirmed to have a stable yield-improvement effect in the spring wheat production and would be worth being further spread.