喷施草甘膦对抗草甘膦油菜糖氮积累的影响

目的]探讨喷施草甘膦对抗草甘膦油菜糖氮代谢的影响,为抗除草剂油菜品种的选育和生产提供理论依据。方法]通过小区试验研究喷施草甘膦对抗草甘膦油菜各器官糖氮含量的影响。结果]抽薹期喷施草甘膦,抗草甘膦油菜初花期、终花期和成熟期各器官的可溶性糖含量和可溶性糖总量均明显增加;各器官的氮素含量和氮素总量明显减少;各器官的糖氮比明显提高。施N、施P、施K和不施肥条件下,喷施草甘膦上述各指标均有相似的变化趋势。结论]各器官中呈现出糖增氮降的变化可能主要是由于含氮物质合成能力的下降所致。

Effects of Spraying Glyphosate on Sugar-nitrogen Accumulation in Glyphosate-resistant Rapeseed

Objective] The aim was to explore effects of spraying glyphosate on sugar-nitrogen accumulation in glyphosate-resistant rapeseed so as to provide theoretical basis for the breeding and production of herbicide-resistant rapeseed variety.Method] We studied effects of spraying glyphosate on sugar-nitrogen accumulation in glyphosate-resistant rapeseed through field experiments.Result] Spraying glyphosate on glyphosate-resistant rapeseed at bolting stage,soluble sugar content and total amount soluble sugar of various organs obviously increased at the beginning and ending of flower stage and maturing stage;nitrogen content and total amount nitrogen of various organs obviously reduced;the ratio of soluble sugar to N of various organs increased obviously.Under the conditions of N, P, K and no fertilizer application,the above indexes of spraying glyphosate had similar change tendency.Conclusion] After spraying glyphosate, there is a tendency that various organs sugar increased and nitrogen reduced,which may be mainly due to the decline of the synthesis of nitrogen content matter.