基于指数施肥法的一年生油松菌根化容器苗的供N研究  

The reasonable N supply for 1a Pinus tabulaeformis container seedlings with the mycorrhizal in response to different exponential regimes

作　　者：汪力[1] 郭素娟[1] 刘正民[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《生物学杂志》2013年第5期27-32,共6页Journal of Biology

基　　金：国家“十一五”科技支撑计划资助项目(2006BAD18B02);“985”森林培育科技创新平台开放基金资助项目(0001108004);中央高校基本科研业务费专项资金资助

摘　　要：为了探讨一年生菌根化油松容器苗的最适苗木供N量和供N速率,采用4种不同指数施肥量进行了试验。通过测定苗木生物量和N含量,显示总供N量为80 mg/株的处理组在生物量积累和苗木N含量上显著优于其它各组(P<0.05);在100 d时,该处理可获得0.47 mg/株·d的N最适添加速率;在该速率下,苗木生物量、N含量分别可以达到845.60 mg/株和6.51 mg/株。根据生物量和N含量随着供N量增加的回归拟合结果,在107 d的生长过程中,67.96 mg/株至84.15 mg/株的供N总量可以使得一年生油松幼苗获得较高的生物量积累水平和N含量。In order to investigate the optimum seedling N content and the rate of N supply for mycorrhizal container seedlings of 1 a Pi- nus tabulaeformis, this experiment was conducted with four different exponential N fertilization regimes. The biomass and seedling N content of the seedlings were determined. The results showed that among all the treated groups the group with 80 mg N plant^-1 pro- duced notably （P 〈 0. 05） in both the accumulation of biomass and the N content. This treatment group also resulted an average opti- mum N application rate of 0. 47 mg plant- 1 d^-1 after 100 days＇ growing. In this addition rate, the seedling biomass and N content were 845.60 mg plant^- 1 and 6. 51 mg N plant ^-1, respectively. Based on the regression analysis of biomass and N content growth curves, we concluded that the amount of 67.96 to 84. 15 mg · plant^-1 N supplied in 107 d did the greatest effect on biomass and N content of la Pinus tabulaeformis.

关 键 词：菌根 油松 指数施肥 生物量 氮 

分 类 号：S791.254[农业科学—林木遗传育种]