光氮互作对番茄光合特性的影响  

Interactive Effects of Light Intensity and Nitrogen Supply on Photosynthetic Characteristics of Tomato

作　　者：袁野[1] 吴凤芝[1] 周新刚[1] 张丽茁[2] 

机构地区：[1]东北农业大学园艺学院,黑龙江哈尔滨150030 [2]哈尔滨市农业科学院,黑龙江哈尔滨150070

出　　处：《作物杂志》2011年第1期13-16,共4页Crops

基　　金：黑龙江省重点攻关项目(GB06B111-8);农业部行业计划(nyhyzx07-007)

摘　　要：通过盆栽试验研究了不同光照强度、氮肥用量对番茄光合特性的影响。结果表明,光氮互作对番茄光合特性影响显著,以光强70%、施N240kg/hm2处理的番茄净光合速率、气孔导度最高,胞间CO2浓度最低。随施氮量的增加,番茄叶片叶绿素a(Chl a)和叶绿素b(Chl b)含量增加,增加到一定水平后下降,100%、70%自然光处理在240kg/hm2施氮量下达到最高,50%、30%自然光处理以120kg/hm2施氮量最高;遮光处理使Chl a和Chl b含量增加。增施氮肥、遮光处理使番茄Chl a/Chl b降低。综合番茄光合特性的测定结果,100%、70%自然光处理以240kg/hm2施氮量较为适宜,50%、30%自然光处理以120kg/hm2施氮量较为适宜。Interactive effects of light intensity and nitrogen supply on photosynthetic characteristics of tomato were studied with potted tomato.The results indicated that interaction of light intensity and nitrogen had significant influence on photosynthetic characteristics.Under the treatment of 70% of light intensity and 240kg/hm2 of nitrogen supply,net photosynthetic rate and stomatal conductance of tomato were the highest,while cell CO2 concentration was the lowest.Both nitrogen and shading treatments decreased Chl a/Chl b.With the increase of nitrogen,the Chl a and Chl b contents increased first then decreased.The Chl a and Chl b contents under the treatments of 240kg/hm2 of nitrogen supply with 100% and 70% natural light intensity and those under 120kg/hm2 of nitrogen supply with 50% and 30% natural light intensity were the highest.The shading treatments increased the contents of Chl a and Chl b.240kg/hm2 of nitrogen supply combining with 100% and 70% natural light intensity and 120kg/hm2 with 50% and 30% natural light intensity were appropriate.

关 键 词：光照强度 氮 番茄 光合特性 

分 类 号：S641.2[农业科学—蔬菜学]