不同光照强度和氮、钾浓度对高羊茅生长早期植物学特性的影响  

Effects of Light Intensity, Nitrogen and Potassium on the Botanical Character of Fescue arundinacea Schreb.

作　　者：卢娜[1] 张兴兴[1] 闫雯[1] 安渊[1] 

机构地区：[1]上海交通大学农业与生物学院农业部都市农业(南方)重点实验室,上海200240

出　　处：《上海交通大学学报（农业科学版）》2010年第3期255-260,共6页Journal of Shanghai Jiaotong University(Agricultural Science)

基　　金：上海市科委成果转化项目(103919N2000);农业部行业项目(200903056)

摘　　要：研究了不同光照强度、N浓度和K浓度对高羊茅(Fescue arundinacea Schreb.)生长的影响。结果表明:高羊茅生长早期,低浓度N和高浓度K处理的地下生物量均大于高浓度N和低浓度K处理;在遮光处理下,低浓度N处理明显提高了地上生物量。在高羊茅生长后期,全光照条件下,高浓度N处理的地上生物量、地下生物量和叶绿素含量均明显高于低浓度N处理,并且高浓度K仅在高浓度N处理下对地上生物量、地下生物量和分蘖数有明显的增加作用;而在遮光处理下,高K浓度处理的地上生物量和地下生物量明显高于低K浓度处理,特别是在低浓度N条件下,高浓度K显著提高了地上生物量和叶绿素含量。N和K浓度在高羊茅不同生长时期和不同光照条件下的作用效果为温室工厂化草坪生产管理提供了科学的依据。The effects of light intensity, nitrogen and potassium on the growth of tall fescue, Fescue arundinacea Schreb., were investigated. For F. arundinacea seedlings, below-ground biomass was larger under treatments of low N and high K concentration than under high N and low K treatments, and low N concentration treatments elevated the above-ground biomass of shaded F. arundinacea seedlings. For F. arundinacea adult plants that were fully exposed to the sunlight, the above-ground biomass, below-ground biomass and chlorophyll content of F. arundinacea were higher under high N concentration treatments than under tow N concentration treatments, and significant enhancement effects of high K concentration treatments was only detected under high N concentration treatments. In contrast, for F. arundinacea adult plants that were shaded, above-ground biomass and below-ground biomass were significantly higher under high K concentration treatments than under low K concentration treatments, and in particular, high K treatments with low N treatments significantly elevated the above-ground biomass and chlorophyll content of F. arundinacea. These effects of N and K concentration on the performances of F. arundinacea at different stages of development and under different light conditions may have implications for efficient production and management of lawns in greenhouses.

关 键 词：高羊茅 光照强度 N浓度 K浓度 生物量 

分 类 号：Q945.41[生物学—植物学]