中国水稻科学Issue(4)：391-400,10.DOI:10.3969/j.issn.1001-7216.2014.04.008
施氮量对超级稻产量和一些生理性状的影响
Effect of Nitrogen Rates on Grain Yield and Some Physiological Traits of Super Rice
摘要
Abstract
A field experiment was conducted to reveal the effects of nitrogen rate on super rice grain yield and its mechanism with two super rice cultivars,Liangyoupeijiu (two-line indica hybrid)and Huaidao 9 (japonica),and two high-yielding elite check cultivars,Shanyou 63 (indica hybrid)and Yangfujing 8 (japonica)as material at four nitrogen (N)rates,no N application and N rates of 120 kg/hm2 ,240 kg/hm2 ,and 360 kg/hm2 .The results showed that the grain yield of two super rice cultivars increased with increasing N rates from 0 to 360 kg/hm2 .Similarly,the physiological performance,such as net photosynthetic rate and nitrate reductase activity of the flag leaf,root oxidation activity and zeatin + zeatin riboside content,shoot dry weight,root dry weight and the root/shoot ratio were improved with increassing N rates for both super rice cultivars.The grain yield and the physiological performance of the two check cultivars were also improved with the increase of N rates from 0 to 240 kg/hm2 .The above-mentioned indexes were decreased at the N rate of 360kg/hm2 for the two check cultivars.At the same N rate the grain yield of the two super rice cultivars was higher than that of the two check cultivars,while the physiological performance of the super rice cultivars was just the opposite under N rates no more than 240kg/hm2 .However,the physiological performance was better for super rice at the N rate of 360 kg/hm2 .The results suggested that super rice cultivars could obtain a higher grain yield than elite high-yielding cultivars at either a low N rate or a high N rate,and a high N rate was favorable to realize high-yielding potential of super rice.关键词
超级稻/施氮量/产量/根系活力/光合速率Key words
super rice/nitrogen rate/grain yield/root activity/photosynthetic rate分类
农业科技引用本文复制引用
付景,王志琴,袁莉民,王学明,杨建昌..施氮量对超级稻产量和一些生理性状的影响[J].中国水稻科学,2014,(4):391-400,10.基金项目
国家自然科学基金资助项目(31271641) （31271641）
国家公益性行业(农业)科研专项(201103003,201203079,201203031) （农业）
国家科技支撑计划资助项目(2011BAD16B14,2012BAD04B08,2013BAD07B09) （2011BAD16B14,2012BAD04B08,2013BAD07B09）
江苏高校优势学科建设工程专项 （）
