孕穗至灌浆期土壤渍水对冬小麦N、P、K素含量和积累量的影响

运用盆栽模拟土壤渍水逆境试验,研究孕穗期和灌浆期土壤渍水对不同小麦品种根系和地上部分N、P 、K素吸收和运转影响.结果表明,土壤渍水逆境对不同小麦品种N、P 、K素吸收的影响有异.孕穗期土壤渍水逆境显著影响根系对N、P素的吸收与运转 ,而对K素吸收与运转影响较小;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素在地下与地上部器官的运转,但对K素在小麦体内的运转和分配影响较小.

Effects of waterlogging on the content and accumulation of nitrogen,phosphorus and potassium nutrition at booting and filling stage of winter wheat

Experiments were carried out on the experiment farm of Anhui agricultural university with pot culture from 2003 to 2005.Effects of waterlogging form booting to filling stage on N,P and K nutrition metabolism were studied by applying simulation waterlogging method.The results showed that waterlogging significantly influenced N and P absorption and transportation and distribution ratio,while less influenced of different cultivars and injury degree of waterlogging at booting stages was more than that at other stages.Waterlogging before booting stage mainly influenced N and P and K absorption content and less influenced transportation and distribution,waterlogging at filling stages mainly influenced N,P and K absorption content and N and P nutrition transportation and distribution ratio,but it has less effect on K transportation and distribution ratio of different organs.