摘要
本项试验按正交设计,试验观测历时7年,从苗木栽植直至林木工艺成熟,对林分生长全过程进行了定期观测及系统研究。其主要结论是:在较贫瘠的土壤上进行林地施肥,对Ⅰ-214杨有明显的增产效应,与对照区相比,施肥区材积最大增长量达132％。在不同肥料中氮肥效应突出,氮、磷、钾及绿肥压青合理配合,能取得增产的最佳效果。
Periodical investigation and systematic study of Populus euramericana cv. Ⅰ-214 stand have been conducted for 7 years from planting stock to tree technical maturity according to orthogonal design. The main results show that the tree growth grown in poor soils can be promoted obviously by application of fertilizers. The greatest increment of timber volume in fertilized plots was 132% compared with control plots. The effects of various fertilizers are different, of which Nitrogenous fertilizer is outstanding.The best effect could be got by rational fertilization of nitrogenous, phosphatic and potassic fertilizers.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1990年第6期485-494,共10页
Scientia Silvae Sinicae
基金
国家经委资助项目
关键词
杨
意大利杨
施肥
正交设计
Populus euramericana cv, I-214
Orthogonal design
The effect of fertilization
