摘要
为了研究缺氮对不同水稻(Oryza sativa L.)品种光合特性的影响,以9516、武育粳、镇稻8号、Kitaake 4种粳稻为材料,测定氮素缺乏营养液(缺氮处理组)和完全营养液(对照)处理下水稻幼苗的叶绿素含量(以叶绿素SPAD值表示)、根冠比以及水稻的光合生理相关指标。结果表明,缺氮处理后水稻叶绿素含量、净光合速率、蒸腾速率和气孔导度均低于对照,而根冠比和胞间CO2浓度高于对照,表明缺氮影响了水稻的叶绿素合成,导致水稻的光合速率降低,干物质积累变少,根冠比升高。
Using 9516,Wuyujing, Zhendao8, Kitaake as materials, effects of nitrogen deficiency on the photosynthetic characteristics of different varieties of japonica rice were studied. The chlorophyll content,root-shoot ratio, photosynthetic rate （Pn）, stomatal conductance （Gs）, intercellular CO2 （Ci） and transpiration rate （E） were studied. The results showed that chlorophyll content,Pn,Gs and E was decreased significantly in rice under nitrogen deficiency. Root-shoot ratio and Ci was higher than that of control. Nitrogen deficiency had some effects on chlorophyll biosynthesis. The Pn of rice was decreased significantly. Dry matter accumulation was decreased significantly. Rrice root-shoot ratio was improved. Nitrogen was one of the necessary element for rice growth. The results will provide theoretic basis and technical approach for nitrogen use.
出处
《湖北农业科学》
北大核心
2014年第8期1762-1764,1828,共4页
Hubei Agricultural Sciences
基金
南京晓庄学院生物学重点学科资助项目(XZZDXK201203)
