不同夜温对西瓜断根嫁接苗生长和生理特性的影响  

Effects of Different Night Temperatures on Growth and Physiological Characteristics of Root-cutting Watermelon Grafted 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2期28-32,共5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)资助

摘　　要：为确定西瓜断根嫁接苗成活后的最佳夜温,研究了不同夜温下西瓜断根嫁接苗形态和生理参数的变化。试验结果表明,夜温从18℃降低至15℃对西瓜断根嫁接苗的生长影响较小,仅叶面积降低了26.5%,叶片中的MDA含量升高了34.9%,但嫁接苗的根系活力提高了50%,育苗的加温成本降低了10%;而12℃的夜温显著抑制了西瓜断根嫁接苗的生长,嫁接苗质量下降。综合考虑嫁接苗质量和育苗成本,低温季节西瓜断根嫁接苗成活后的最佳夜温为15℃。To ensure the optimal night temperature for root-cutting watermelon grafted seedlings, we investigated the growth and physiological changes of grafted seedlings under different night temperatures. The results showed that, when the night temperature was decreased from 18℃ to 15℃, the growth of grafted watermelon seedlings changed slightly, though the leaf area was reduced by 26.5% and the MDA content of leaves was increased by 34.9%, the root activity was increased by 50% and the heating costs was reduced by about 10%. When the night temperature was 12℃, the growth of grafted watermelon seedlings was significantly inhibited and the quality of grafted seedlings was declined. Considered both the quality of grafted seedlings and production cost, the optimum night temperature was 15℃ for root-cutting watermelon grafted seedlings in the low temperature season.

关 键 词：西瓜 断根嫁接 夜温 

分 类 号：S651[农业科学—果树学]