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当前位置: 首页 > 文章 > 密度与氮肥运筹对宁麦9号氮代谢的调控效应 扬州大学学报(农业与生命科学版) 2007,28 (2) 42-46
Position: Home > Articles > Effects of plant density and nitrogen application metabolism of wheat varieties Ningmai 9 Journal of Yangzhou University(Agricultural and Life Science Edition) 2007,28 (2) 42-46

密度与氮肥运筹对宁麦9号氮代谢的调控效应

作  者：
李春燕;蒋小忠;张影;郭文善;封超年;朱新开;彭永欣
单  位：
扬州大学江苏省作物遗传生理重点实验室/扬州大学小麦研究所
关键词：
弱筋小麦;密度;氮代谢;宁麦9号
摘  要：
在大田试验条件下,研究密度与氮肥运筹对弱筋小麦品种宁麦9号植株氮代谢变化的影响,分析氮素运转与籽粒品质、产量的关系。结果表明:增加密度、降低施氮量或氮肥施用前移可显著降低植株氮素积累;各处理叶片氮素转运量和转运氮对籽粒的贡献率最高,其次为茎鞘,颖壳及穗轴最低。氮素转运量与转运效率呈显著正相关(r=0.7837~*)。适当降低花后14～35 d硝酸还原酶活性,籽粒蛋白质含量降低,籽粒品质改善。宁麦9号采用密度为240万·hm~(-2)、施氮量为240 kg·hm~(-2)和基肥、壮蘖肥、倒2叶肥比为7:1:2,可实现优质高产。
译  名：
Effects of plant density and nitrogen application metabolism of wheat varieties Ningmai 9
作  者：
LI Chun-yan JIANG Xiao-zhong ZHANG Ying GUO Wen-shan~* FENG Chao-nian ZHU Xin-kai PENG Yong-xin (Key Lab of Crop Gen and Phys of diangsu Prov/Wheat Res Inst,Yangzhou Univ,Yangzhou 225009,China)
关键词：
weak-gluten wheat;;density;;nitrogen metabolism;;Ningmai 9
摘  要：
Effects of plant density and nitrogen fertilizer on nitrogen metabolism of weak-gluten wheat varieties Ningmai 9 with good grain quality were studied.The relationship of nitrogen remobilization with grain quality and grain yield was al- so analyzed.Increasing plant density,decreasing nitrogen application amount or increasing basal:top dressing nitrogen ap- plying ratio could obviously decrease plant nitrogen accumulation.The order of nitrogen translocation quantity efficiency and contribution rate of transfer nitrogen to grain of the vegetative organ of plant was blade(including flag leaf)>stem>hull+ rachis.Nitrogen translocation quantity had a significant correlation with the rate of transfer nitrogen to grain.Reducing ni- trate reductase(NR)activity from 14th to 35th day after anthesis could make the grain protein content lower and grain quality higher.The treatment of 240×10~4 plants·hm~(-2)density,240 kg·hm~(-2)nitrogen and the ratio of basal:top dress- ing nitrogen 7:3 could get high grain yield with good grain quality.

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