氮磷配施对青冈、苦槠幼苗生物量分配及叶片养分含量的影响  

Effects of Nitrogen and Phosphorus Fertilizer on Biomass Allocation and Leaf Nutrient Content of Cyclobalanopsis glauca and Castanopsis sclerophylla Seedlings

作　　者：尹意婷 白尚斌[1] 程艳艳[1] 王楠[1] 周沁萍 潘丽思 黄梦迪[1] 

机构地区：[1]浙江农林大学暨阳学院,浙江诸暨311800

出　　处：《西南林业大学学报（自然科学）》2015年第4期7-13,共7页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家自然科学基金面上项目(31170594)资助;浙江省自然科学基金面上项目(LY14C160010)资助;国家级大学生创新创业计划项目(201310341019)资助;浙江省教育厅项目(Y201329652)资助

摘　　要：为了解N、P配施对常绿阔叶树生长的影响,采用盆栽试验,研究不同氮磷施量对青冈、苦槠幼苗叶片养分含量及幼苗根、茎、叶生物量的影响。结果表明:施氮、施磷均能增加两树种幼苗叶片的氮含量;施磷能增加幼苗叶片磷含量,而高浓度施氮会降低叶片磷含量;低浓度施氮及施磷均可减缓青冈生长过程中叶片磷含量的下降;施氮、磷对青冈幼苗叶片碳含量表现出促进作用,而对苦槠幼苗叶片碳含量没有显著影响。施氮后青冈幼苗生物量分配表现为根>叶>枝,施磷后则为根>枝>叶;而施氮、磷后苦槠幼苗生物量分配格局均为根>枝>叶。青冈和苦槠幼苗期对氮、磷肥的供应较为敏感,适当施加氮、磷肥有利于其幼苗的生长。In order to understand the influence of nitrogen and phosphorus on the growth of the evergreen broad leaved tree species,the effects of different amount of nitrogen and phosphorus application on leaf nutrient content, root,stem and leaf biomass of Cyclobalanopsis glauca and Castanopsis sclerophylla were studied with pot experiment. Results showed that both nitrogen and phosphorus fertilizer could increase leaf nitrogen content of the two species. Phosphorus fertilizer increased the phosphorus content in the leaves,while a high concentration of nitrogen fertilizer reduced phosphorus content.Low concentration of nitrogen and phosphorus fertilizer might slow the decline of leaf phosphorus content of Cyclobalanopsis glauca seedlings.Nitrogen and phosphorus promoted leaf carbon content of Cyclobalanopsis glauca seedlings increasing,but had no significant effects on that of Castanopsis sclerophylla seed-ling.For Cyclobalanopsis glauca,the biomass allocation in a descending order was root,leaf and branch,after nitro-gen application,and the order was root,branch and leaf after phosphorus application,while for Castanopsis sclero-phylla seedlings,the orders both were root,branch and leaf after nitrogen and phosphorus application.Cyclobalanop-sis glauca and Castanopsis sclerophylla seedling were sensitized to nitrogen and phosphate fertilizer,so,suitable ni-trogen and phosphate fertilizer would benefit their growth.

关 键 词：青冈 苦槠 养分含量 生物量 氮 磷 

分 类 号：S723.1[农业科学—林木遗传育种]