林业科学2011，Vol.47Issue(9)：168-172,5.
氮素营养对长白落叶松移植苗生长及养分状况的影响
Effects of Nitrogen Fertilization on the Growth and Nutrient Status in Larix olgensis Seedlings
摘要
Abstract
The aim of this study was to assess effects of supplemental nitrogen ( N) on Olga Bay larch ( Larix olgensis) seedlings at late stage of growing season in a nursery. From July to September 2009, the seedlings was fertilized with nitrogen during a period of 2 weeks as follows: control ( no fertilization) , 60 kg N · hm-2 , (two applications of urea with each 30 kg N-hm-2) , 120 kg N'hm-2 (four applications) , and 180 kg N · hm-2 (six applications). By the end of growing season, the seedlings fertilized during fast-growing and hardening period had greater shoot biomass, but no significant differences in height, root collar diameter, shoot to root mass ratio, and root biomass in comparison with the control seedlings. Compared to control seedlings, the seedlings fertilized in August and September increased root and shoot N concentrations by 11. 5% - 15. 9% and 6. 0% - 8. 2% , respectively, and the P concentrations by 5. 4% - 22. 9% and 16. 7% -22. 7% , respectively. In the mid of October, the N concentration increased sharply, while the P concentration declined substantially. This study suggested that P fertilization would be recommended at the late growth period in L. Olgensis seedling cultivation to release the decline of the P concentration关键词
长白落叶松/氮肥/苗木质量/养分含量Key words
Larix olgensis/ N supply/ seedling quality/ nutrient concentration分类
农业科技引用本文复制引用
祝燕,刘勇,李国雷,林平,康瑶瑶,孙宇..氮素营养对长白落叶松移植苗生长及养分状况的影响[J].林业科学,2011,47(9):168-172,5.基金项目
中央高校基本科研业务费专项资金资助(JD2011-3、BLJD200905),国家"十一五"科技支撑计划课题(2006BAD24B01). （JD2011-3、BLJD200905）
