生态环境学报Issue(10)：1688-1694,7.
大气高CO2浓度对油菜氮素同化累积与植株生长的影响
Effects of high CO2 concentration in atmosphere on Nitrogen assimilation and plant growth of Oilseeds Rape (Brassica napus L.)
摘要
Abstract
In order to provide guidance for reasonable nitrogen (N) fertilizer application of rapeseed (Brassica napus L.) under high CO2 concentration in atmosphere, create parameters with high yield and efficiency, and supply theoretical basis for further investigate of N metabolism regulation mechanisms. Micro-plot experiment was conducted with 2 rapeseed genotypes (Huyou15-33 and 742-2) and 2 CO2 concentrations (normal:400μmol·mol-1, high:(800±20)μmol·mol-1) under 2 different N application levels (N application, no N), study on the changes of NR and GS activities, soluble protein content and the response of shoot dry weight and accumulation amount of N to CO2 concentrations.Results show that NR and GS activities are increased in high CO2 concentration treatment;NR activity is closely relate to reapeseed genotypes and growth stages. Enzymes activities of A genotype in N application treatment are higher than no N application treatment under high CO2 concentration condition;enzymes activities of B genotype in N application treatment are lower than no N application treatment only at the elongation stage, expressed reverse changes at others growth stages;GS activity is increased under N application condition with normal CO2 concentration, decreased in high CO2 concentration treatment (accept seedling stage).Content of soluble protein in leaves is decreased under high CO2 concentration condition (except flowering stage); high N fertilizer application can increase the soluble protein content in leaves under normal CO2 concentration condition, while the reverse situation of soluble protein content in leaves is expressed in high CO2 concentration treatment. Shoot dry weight and N accumulation amount are increased under high CO2 concentration and high N application conditions, dry biomass and N accumulation amount in rapeseed are generally significant correlated with the above physiological parameters.关键词
大气CO2/油菜/氮素同化酶/可溶性蛋白/氮素累积量Key words
atmosphere CO2/Oilseed rape/Nitrogen(N) assimilation enzymes/Soluble protein/N accumulation分类
农业科技引用本文复制引用
杨春,官春云,谭太龙,张力,余佳玲,廖琼,张振华,刘强,荣湘民,宋海星..大气高CO2浓度对油菜氮素同化累积与植株生长的影响[J].生态环境学报,2013,(10):1688-1694,7.基金项目
国家自然科学基金项目(31071851；31101596；31372130)；国家油菜产业技术体系栽培生理岗位；国家支撑计划（2012BAD15B04；2010BAD01B01）；湖南省高校创新平台开放基金项目（12K064；10K034）；湖南省政府专项 （31071851；31101596；31372130）
