江汉大学学报（自然科学版）2024，Vol.52Issue(1)：28-36,9.DOI:10.16389/j.cnki.cn42-1737/n.2024.01.003
拔节期低温对小麦结实特性的影响及追施氮肥的缓解效应
Effects of Low-temperature on Wheat Grain Setting Characterisics and the Mitigation Effect of Top-dressing Nitrogen Fertilizer at the Jointing Stage
摘要
Abstract
To clarify the effect of nitrogen fertilizer on the number of filled grains and grain weight of low-temperature wheat at the jointing stage,a pot experiment was carried out with wheat variety HC3366 as the material.Low-temperature stress treatments for 5 days(LT-T1)and 10 days(LT-T2)were carried out at the jointing stage,with natural temperature as control(CK-LT),and nitrogen fertilizer(LT-N)was applied on the end of low-temperature stress(LT-N).The spike traits,spikelet development,and floret development of potted wheat were compared and analyzed.The results showed that compared with CK-LT,with the extension of low-temperature time,the decrease of spike number,grain number per spike,grain weight,total spikelet number,and total floret number under LT treatment gradually increased;the number of top-fruiting florets,base-fruiting florets,strong-fruiting florets,and weak-fruiting florets all decreased significantly,and among them,the number of base-fruiting florets and weak-fruiting florets decreased the most.Compared with LT,with the extension of low-temperature time,the increase of grain number per spike,spike number,grain weight,total spikelet number,and total floret number under LT-N treatment gradually increased;the number of top-fruiting florets,base-fruiting florets,strong-fruiting florets,and weak-fruiting florets all increased,and among them,the number of base-fruiting florets and weak-fruiting florets increased the most.In summary,low temperature at the jointing stage mainly reduced the number of base-fruiting florets and weak-fruiting florets,reduced the seed setting rate of florets,and then reduced the number of grains per spike and the weight of weak grains.Top-dressing nitrogen fertilizer after low-temperature mainly increased the number of base-fruiting florets and weak-fruiting florets,increased the seed setting rate of base-fruiting florets and weak-fruiting florets,and increased the contribution rate of base-fruiting florets and weak-fruiting florets to grain number per spike,thereby increasing grain number per spike and weak grain weight,and reducing yield loss caused by low-temperature stress.关键词
小麦/低温胁迫/氮肥/拨节期/结实粒数Key words
wheat/low-temperature stress/nitrogen fertilizer/jointing stage/number of filled grains分类
农业科技引用本文复制引用
张士雅,谭植,李浩杰,雍玉东,周文银,李文阳,刘良柏,刘飞,闫素辉..拔节期低温对小麦结实特性的影响及追施氮肥的缓解效应[J].江汉大学学报（自然科学版）,2024,52(1):28-36,9.基金项目
安徽省自然科学基金资助项目(1408085MC48) （1408085MC48）
安徽省现代农业产业技术体系建设专项资金项目(小麦产业技术体系) （小麦产业技术体系）
安徽省高校协同创新项目(GXXT-2021-089) （GXXT-2021-089）
