氮素营养对莲藕生长和干物质累积的影响  

Effect of Nitrogen Nutrition on Growth and Dry Matter Accumulation of Rhizome Lotus

作　　者：刘冬碧[1] 张小勇[1,2] 段小丽[1] 余延丰[1] 熊桂云[1] 陈防[3] 

机构地区：[1]湖北省农业科学院植保土肥研究所,武汉430064 [2]华中农业大学资源与环境学院,武汉430070 [3]中国科学院武汉植物园,武汉430074

出　　处：《湖北农业科学》2011年第20期4138-4141,4155,共5页Hubei Agricultural Sciences

基　　金：国际植物营养研究所资助项目(IPNI-HB-24);湖北省农业科技创新中心资助项目(2007-620-001-03)

摘　　要：采用大盆试验研究了氮素营养对莲藕(Nelumbo nucifera Gaertn)生长和干物质累积的影响,结果表明,适宜的氮素营养促进莲藕根系发育、增强根系活力,明显增加莲藕立叶数量和立叶面积、提高立叶SPAD值,从而增强叶片的光合作用能力、促进生育前期光合产物的累积;适宜的氮素营养还能延缓叶片衰老、适当延长莲藕成熟期,促进光合产物从叶片等器官转移并贮存到收获物中,最终提高产量。Effect of nitrogen nutrition on the growth and dry matter accumulation of rhizome lotus （Nelumbo nucifera Gaertn） was studied by pot experiment. Results showed that, rational nitrogen nutrition improved the development and activity of root system, obviously increased the number, total area and SPAD value of standing-leaf, hence improved the photosynthesis of leaves and the accumulation of dry matter in leaves. Rational nitrogen nutrition could also slower leaf senescence, appropri- ately prolong the ripening period of rhizome lotus, therefore improved the transportation and storage of dry matter from leaves to the nrodHct nnrl finally increased yield of rhizome lotus.

关 键 词：莲藕(NelumbonuciferaGaertn) 氮素营养 生长 干物质累积 

分 类 号：S143.3[农业科学—肥料学] S645.1[农业科学—农业基础科学]