应用生态学报2012，Vol.23Issue(7)：1832-1838,7.
黄淮平原冬小麦不同品种根系生长差异
Differences in root developmenly of winter wheat cultivars in Huang-Huai Plain, China
摘要
Abstract
Selecting one presently popularized winter wheat cultivar ( Zhengmai 9023 ) and two cultivars (Abo and Fengchan 3) introduced in the 1950s and 1960s in Huang-Huai Plain as test materials, and by using minirhizotron technique, this paper studied the live root length, root diameter distribution, and net root growth rate of the cultivars. Fine roots with a diameter from 0. 05 mm to 0. 25 mm occupied the majority of the whole root system, and the fine roots with a diameter less than 0.5 mm accounted for 98% of the live root length. The average root diameter varied with plant growth, the variation range being 0.15-0.22 mm, and no significant difference was observed among the cultivars. The live root length was significantly positively correlated root number, suggesting that root number was the main factor for the increase of live root length. The most vigorous growth period of the roots was from reviving to jointing stage, and Abo and Fengchan 3 had a longer period increased root vitality, as compared with Zhengmai 9023. For Zhengmai 9023 , its fine roots with a diameter more than 0. 1 mm had an increasing proportion after jointing stage, which was helpful for improving plant resistance, root activity, and grain-filling at late growth stages.关键词
微根管/品种/冬小麦/根系发育Key words
minirhizotron/ cultivar/ winter wheat/ root development分类
农业科技引用本文复制引用
邱新强,高阳,李新强,黄玲,段爱旺..黄淮平原冬小麦不同品种根系生长差异[J].应用生态学报,2012,23(7):1832-1838,7.基金项目
现代农业产业技术体系建设专项资金(CARS-3-1-30)和公益性行业(农业)科研专项(201203077)资助. （CARS-3-1-30）
