綜合氮肥管理技術(shù)對(duì)旱地小麥土壤水氮分布及根系生長的優(yōu)化研究

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Abstract：Acomprehensivenitrogen fertilizer managementtechnology has beenproposed toaddressthe limitationof existing wheat nitrogen fertilizer management techniques that focus toomuchonoptimizing single nitrogenapplicationand neglectthesynergisticeectsofwaterandnitrogen.Firstlytheoptimizationofnitrogenfertilizerdosageiscombinedwith farming methods，cultivation techniques，mulching andother agricultural measures to focus onthe rational applicationof nitrogen fertilizer.Atthesametime，cropyieldandnitrogen fertilizerutilzationeficiencyareenhancedtroughagronomic measures.Two treatment groups are setup inthe experiment，including Group A with traditional mulch cultivation and Group Bwithoptimized fertilizer application in mulch cultivation.Theresults showthatthe average water storage in Group A and Group B is 147mm and 155mm atO dafter flowering，and the increase inGroupBis significantly higher than that in Group A. The water-N contents in the 0～10cm and 10-20cm soil layers in the furrow are 27kgN/hm2 and 15kgNhm2 25kgNhm2 and 13kgN/hm2 for groups A and B respectively. The root weight density of group B is increased by 32.3% in the wheat rows and 8.2% on the ridges.At O d after anthesis， Group B shows a 45% increase in root surface area density in the wheat rows and a 327% increase in the 10～20cm soil layer on the ridges respectively. Therefore，the method proposed by the researchcanefectively improvethedistributionofsoil waterandnitrogeninwheatrows，xertapositiveeffectontheroot growth of wheat， and provide guidance for practical wheat production management.

Keywords：Wheat; Nitrogen fertilizer management techniques; Soil;Root growth; Cropnitrogen fertilizerutilization

小麥作為全球最重要的糧食作物之一，具有重要的經(jīng)濟(jì)價(jià)值[。（剩余10141字）