不同昼温和光照强度对西瓜断根嫁接苗生长和生理特性的影响  

Effects of Different Daytime Temperatures and Light Intensities on Growth and Physiological Characteristics of Root-pruning Grafted Watermelon Seedlings

作　　者：华斌[1] 黄远[1] 万正杰[1] 孔秋生[1] 李静[1] 亢敏[1] 别之龙[1] 

机构地区：[1]华中农业大学园艺林学学院/园艺植物生物学教育部重点实验室,武汉430070

出　　处：《长江蔬菜》2014年第4期27-30,共4页Journal of Changjiang Vegetables

基　　金：国家西甜瓜产业技术体系(CARS-26-16);公益性行业(农业)科研专项(201303014)

摘　　要：为确定西瓜断根嫁接苗成活后的最佳昼温和光照强度,研究了不同昼温和光照条件下,西瓜断根嫁接苗生长和生理特性的变化。试验结果表明,180μmol·m-2·s-1光照强度处理下的西瓜断根嫁接苗质量显著优于100μmol·m-2·s-1光照强度处理,说明在一定的范围内,增加光照强度能显著提高西瓜断根嫁接苗的质量。24℃昼温处理下的西瓜断根嫁接苗的生长速率略低于28℃和32℃昼温处理,但是该处理下的嫁接苗较为健壮,积累了较多的干物质,具有较高的根冠比和壮苗指数,受到的伤害较小,更符合西瓜嫁接壮苗的标准。To find out the optimal daytime temperature and light intensity for root-pruning grafted watermelon seedlings, we investigated the growth and physiological changes of grafted seedlings under different daytime temperatures and light intensities. The results showed that, the quality of root-pruning grafted watermelon seedlings was significantly better under 180 p^mol, m-2-s-1 light intensity than those under 100 p, mol-m-2＂ s-1 light intensity, indicating the quality of root-pruning grafted watermelon seedlings could be improved significantly when the light intensity was increased in a certain range. Although the growth rate of grafted watermelon seedlings under 24℃ daytime temperature was slightly lower than those under 28℃ and 32℃ daytime temperature, the seedlings under 24℃ daytime temperature had more dry matter, as well as higher root-shoot ratio and vigor index, which were more conformed to the standard of strong seedling.

关 键 词：西瓜 断根嫁接 昼温 光照强度 生长 生理特征 

分 类 号：S651[农业科学—果树学] S616[农业科学—园艺学]