Effect Of Different Management Techniques On Winter Wheat Yield And Nutrient Utilization In Hebei Piedmont Plain

Winter wheat is the main grain crop in Hebei piedmont plain. With the farmland is decreased year by year, yield level already became the important factors, From the sustainable development and high yield and high efficiency points, the current high yield research mostly“high yield not high”,“high efficiency not high”, so finding a high yield and efficient solutions to be urgent winter wheat production and the problems in Hebei piedmont plain. Therefore, this research in the piedmont plain winter wheat in Hebei Province as the research object, using cultivation practices （4+X） test and the single-factor test method, on the basis of existed survey analysis of limit the piedmont of winter wheat efficient factor in Hebei Province, experiments investigating the impacts of different management practices of group, dry matter accumulation, nutrient uptake and fertilizer application effects, and through the nitrogen, potassium, single-factor test comparative analysis to study the optimum amount of nitrogen and potassium, in order to the protection of the safety of food production in Hebei Province, provides a theoretical basis to improve the production efficiency of water and fertilizer resources. The main conclusions showed as follows:1.Super high yield practices can realize wheat yield increases of 30%-50%, and dry matter accumulation and nutrient absorption higher others, but not efficiency. Dry matter increase rate is the fastest in jointing to flowering, so jointing advantageous to dry matter accumulation. In different management practices, nutrient absorption varied in the same, N, P and K accumulation of three high-yield practices were higher than farmer practice , the greatest accumulations occurred in practice of super high yield. Nitrogen and phosphorus translocation on contribution is the highest by High yield and high efficiency practices, amounting to 3.6%、90.4%, translocation of potassium of high yield and high efficiency practices was minimum. High yield and high efficiency of PFP、RE and AE was the highest, amounting to 47.3kg/kg,34.3% and 25.6kg/kg.Nitrogen fertilizer production efficiency were increased by 15%-20% efficiency effort.2.Yield,dry matter and N, P and K nutrient accumulation of N₀ were significantly lower than other nitrogen levels under different nitrogen levels. Within nitrogen rate 0-255 kg/hm²,yield increased with the increase of nitrogen level ,N₂₅₅ is the highest level, about 8636.9kg/hm².Dry matter and N, P and K accumulation、dry matter and nitrogen translocation on grain、PFP of phosphorus and potassium is highest by N₂₅₅.So that the region suitable for the amount of nitrogen should be controlled below in 212kg/hm².3.The highest yield under different levels of potassium, highest of yield was120 kg/hm², about 8457.7kg/hm².Dry matter and N, P and K accumulation、dry matter and nitrogen translocation on grain、PFP of phosphorus and potassium is highest by K₁₂₀. So that the region suitable for the amount of potassium should be controlled below in 90kg/hm².4.Different management pattern and nitrogen test showed that mature date of winter wheat on soil nitrate nitrogen accumulation and nitrogen, in addition to the related, and fertilization period, crop absorption of nitrogen, soil residual nitrate leaching is higher, the greater the risk.