供氮水平对爬山虎幼苗生长形态和氮分配的影响  

Effects of nitrogen supply on Parthenocissus tricuspidata seedling morphology and nitrogen allocation

作　　者：王忠强[1] 吴良欢[1] 许波峰 邵雪玲[1] 

机构地区：[1]浙江大学环境资源学院环境修复与生态健康教育部重点实验室 [2]宁波市江北区农林水利局林特工作总站,浙江宁波315020

出　　处：《应用生态学报》2007年第10期2214-2218,共5页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30370838);宁波市科技合作计划资助项目(2005C100041).

摘　　要：通过水培试验,研究了不同氮素水平(0、0.15、0.3、0.45、0.6和0.75g.L-1)条件下爬山虎幼苗的生长形态和体内氮分配状况.结果表明:低氮处理的爬山虎侧枝发育较小,而较高氮处理的侧枝着生位置低,且长度显著高于低氮处理;供氮水平的提高能促进植株的生物量及茎、叶、根氮含量和氮累积量的增加,其中叶生物量占全株生物量的比例最高,在50%以上;叶的氮累积量占整个植株总氮量的60%～70%.With hydroponic culture, this paper studied the effects of different nitrogen （N） supply levels （0, 0. 15, 0. 3, 0. 45,0. 6, 0. 75 g N · L^-1 ） on the seedling morphology and N allocation of Parthenocissus tricuspidata. The results showed that lower N supply retarded the development of P. tricuspidata seedling＇s branch; while higher N supply had significant effects in promoting the seedling＇ s early branching and lowering the branching position on the main stem. Supplying higher amount of N increased the plant biomass and the N concentration in root, leaf and stem significantly. Compared with stem and root, leaf had the highest biomass, accounting for 50% of the total biomass, and the highest N accumulation, accounting for 60%-70% of the total accumulated N.

关 键 词：爬山虎 氮素营养 生长形态 氮分配 

分 类 号：S687[农业科学—观赏园艺]