南京林业大学学报（自然科学版）2011，Vol.35Issue(1)：24-28,5.DOI:10.3969/j.issn.1000-2006.2011.01.006
控释氮肥对长白落叶松苗木生长的影响
Application of controlled-release fertilizer in the cultivation of Larix olgensis seedling
摘要
Abstract
A filed experiment was conducted to compare the effect of controlled-release fertilizer (CRF) on the growth of one year old Larix olgensis seedling with conventional urea at 0, 120, 240, and 360 kg/hm2 N rate.The results showed that both the height and first-order lateral roots(L ＞ 5 cm)were significantly enhanced when L olgensis seedlings were applied with CRF as compared with common nitrogen fertilizer irrespective of rate.And at 360 kg/hm2 rate, the dry mass increased by 24.3 ％ applying the CRF in contrast to common urea.While no significant differences were found in either height to diameter ratio, or shoot to root mass ratio in the nitrogen types.At rates of both 120 kg/hm2 and 240 kg/hm2 nitrogen application, more nitrogen content was associated with the seedlings under CRF treatments, whereas the less ratio of leaf to total nitrogen content was found in the seedlings applied with CRF, indicating that at low and moderate CRF rates,seedlings absorbed more nitrogen and allocated more nitrogen to the stem and root.Combined results for seedling response to the urea source and their rates indicated that CRF was superior to conventional urea and the optimal rate was 240 kg/hm2 rate.关键词
控释氮肥/长白落叶松/苗木培育Key words
controlled-release fertilizer/ Larix olgensis/ seedling cultivation分类
农业科技引用本文复制引用
祝燕,马履一,刘勇,李国雷,马跃,朱中一..控释氮肥对长白落叶松苗木生长的影响[J].南京林业大学学报（自然科学版）,2011,35(1):24-28,5.基金项目
"十一五"国家科技支撑计划(2006BAD24B01) （2006BAD24B01）
中央高校基本科研业务费专项资金项目(BLJD200905) （BLJD200905）
