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DA-6对秋季草莓叶片光合速率和植株生长的影响
引用本文:苗鹏飞,刘国杰,李绍华,单守明.DA-6对秋季草莓叶片光合速率和植株生长的影响[J].应用生态学报,2007,18(12):2722-2726.
作者姓名:苗鹏飞  刘国杰  李绍华  单守明
作者单位:1. 中国农业大学农学与生物技术学院,北京,100094
2. 中国科学院植物研究所,北京,100093
基金项目:引进国际先进农业科技计划(948计划);云南红河农业开发资助项目
摘    要:以‘法国3号’草莓为材料,研究了秋季叶面喷施10、20和30 mg.L-1的DA-6处理对草莓幼苗叶片光合作用、活性氧代谢和植株生长的影响.结果表明:叶面喷施20和30 mg.L-1的DA-6处理使叶片净光合速率分别提高了17.5%和20.6%,并显著提高了叶绿素a、b含量及SOD、CAT酶活性,同时降低了MDA和活性氧含量.20和30 mg.L-1的DA-6处理显著增加了草莓平均单叶干质量,极显著增加了草莓茎和根系干质量,根冠比分别增加了29.9%和29.3%.表明秋季施用一定浓度的DA-6有利于草莓幼苗植株生长.

关 键 词:原甲藻  赤潮  形态结构  分类  
文章编号:1001-9332(2007)12-2722-05
收稿时间:2006-11-02
修稿时间:2007-09-24

Effects of foliar spraying DA-6 on the photosynthetic rate and plant growth of strawberry in autumn
MIAO Peng-fei,LIU Guo-jie,LI Shao-hua,SHAN Shou-ming.Effects of foliar spraying DA-6 on the photosynthetic rate and plant growth of strawberry in autumn[J].Chinese Journal of Applied Ecology,2007,18(12):2722-2726.
Authors:MIAO Peng-fei  LIU Guo-jie  LI Shao-hua  SHAN Shou-ming
Institution:College of Agronomy and Biotechnology, China Agricultural University, Beijing 100094, China. miaopengfei@126.com
Abstract:With strawberry ' French 3' (Fragaria x ananassa Duch cv. French 3) as test material, this paper studied the effects of foliar spraying DA-6 at the rates of 10, 20 and 30 mg x L(-1) in late autumn on its seedlings net photosynthetic rate, metabolism of reactive oxygen species, and plant growth. Compared with the control, foliar spraying DA-6 of 20 and 30 mg x L(-1) increased the net photosynthetic rate, chlorophyll a and b contents, and SOD and CAT activities significantly, and decreased the reactive oxygen and MDA contents. Moreover, foliar spraying DA-6 of 20 and 30 mg x L(-1) increased the average dry weight per leaf, and the dry mass of shoot and root significantly. The ratio of root to shoot after spraying DA-6 of 20 and 30 mg x L(-1) was 29.9% and 29.3% higher than the control, respectively. Foliar spraying appropriate concentration of DA-6 in late autumn could improve the plant growth of strawberry seedlings.
Keywords:DA-6
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