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在小麦灌浆期,剧烈的气温变化会导致一些品种和麦田发生青枯危害,表现为茎杆青灰发暗,不能正常落黄;籽粒灌浆不足,千粒重大幅度下降,造成减产.品种间对此反应不一,受害程度大小不同.研究表明,抗青枯品种具有较强的根系活力,体内可溶性总糖量高,而总氮量低,花后灌浆期,茎鞘叶物质分解转运量大,转运速率高,植株体内碳氮比较高,灌浆进程衰退缓慢.穗和籽粒发育充分,籽粒占穗重的比例较高.不抗青枯的品种茎杆物质积累量高,分解转运早,穗和籽粒在灌浆早期发育快,但在剧变气温出现后,根系活力迅速衰退,茎、鞘、叶物质分解缓慢,转运量低,植株体内碳氮比值较低,穗和籽粒发育不充分,籽粒占穗重的比例较低.
In the wheat filling stage, the severe temperature change will cause some varieties and wheat fields to suffer the bruising and withering, which is manifested as the dark gray of the stem, which can not fall yellow normally; insufficient grain filling and significant decrease of thousand grain weight, Different degree of victimization.The results showed that the resistant varieties had strong root activity, the total soluble sugar content was high, but the total nitrogen content was low. After anthesis, High rate of carbon and nitrogen in the plant body, the slow decline of grain filling process. Spike and grain development is full, the proportion of grain to ear weight is higher. The rapid development of early filling stage, but after the emergence of the drastic temperature, the rapid decline of root activity, stem, sheath and leaf decomposition of material slow, low translocation, plant carbon and nitrogen ratio is low, spike and grain development is not sufficient, The proportion of lower.