【摘要】 运用盆栽模拟土壤渍水逆境试验,研究不同生育时期根际土壤渍水逆境对不同小麦品种N、P、K素吸收、运转和分配的影响。结果表明,根际土壤渍水逆境对不同小麦品种N、P、K素吸收的影响有异;不同生育时期根际土壤渍水逆境显著影响根系对N、P素的吸收、运转与分配,以孕穗期渍水逆境影响最大,其次为灌浆期和拔节期,而不同生育时期根际土壤渍水逆境对K素的吸收影响较小。孕穗期以前渍水逆境主要影响小麦根系对N、P、K素的吸收,对N、P、K素在小麦体内的运输和分配影响较小;灌浆期渍水逆境不仅影响根系对N、P、K素的吸收,同时也影响N、P素在地上部各器官中的运转和分配,但对K素在小麦体内的运转和分配影响较小。因此,基肥中施足P肥和K肥,拔节孕穗期重施速效N肥,灌浆期叶面喷施KH2PO4对于培育壮秆大穗,减轻小麦渍害,提高受渍小麦籽粒产量具有非常重要的实际意义。更多还原

【Abstract】 Experiments were carried out on the experiment farm of Anhui agricultural university with pot culture from 2003 to 2005.Effects of waterlogging at different stages on N,P and K nutrition metabolism were studied applying simulation waterlogging method.The results showed that waterlogging at different stages significantly influenced N and P nutrition absorption content and transportation and distribution ratio and less influenced K nutrition of different cultivars,injury degree of waterlogging at booting stages more than other stages.Waterlogging before booting stage mainly influenced N and P and K nutrition absorption content and less influenced transportation and distribution,waterlogging at filling stages mainly influenced N and P and K nutrition absorption content and N and P nutrition transportation and distribution ratio and less influenced K nutrition transportation and distribution ratio of different organ.So applying rich P and K fertilizer at basal fertilizer and rapidly available N fertilizer form jointing stage to booting stage and KH₂PO₄ at filling stage and it is very important that to culture strong stem and large spike and to reduce waterlogging injury and to increase grains yield of waterlogging wheat.更多还原