【作者】 王杏元； 徐跃进；

【Author】 Wang Xingyuan (Hunan Horticulture Research Institute, Chang sha 410125) & Xu Yuejin ( Department of Horticulture, Huazhong Agricultural University, Wuhan 430070)

【机构】 湖南省园艺研究所； 华中农业大学园艺系；

【摘要】 1991年秋对不同氮素水平和密度条件下红菜苔群体光合速率进行了研究。结果表明: 红菜苔群体光合速率日变化为午休型;红菜苔叶片叶绿素含量、叶面积指数及比叶重与群体光合速率成正相关;增施氮肥和降低栽培密度能提高群体光合速率,但效果不显著;红菜苔产量与群体光合速率不相关。更多还原

【Abstract】 The photosynthetic rates (PR) in B. campestris population under different rates of nitrogen application and plant densities were investigated. The results were as follows: 1) In Wuhan, changes of PR in both B. campestris population and single leaf (function leaf) showed a similar two peak curve (i. e. type of noon-rest). 2) B. campestris content of leaf chlorophyll, leaf area index , leaf area-weight ratio were positive significantly correlated with the PR. 3)To increase nitrogen application and decrease plant densities can improve photosynthetic rates, but the effect was not remarkable. 4) The PR in B. campestris population wasn’t correlated with the line yield of B. campestris.更多还原