摘要
对云杉新播和换床苗的不同施氮量、不同施氮次数、不同施氮时间等因素与苗木生长的相关关系进行了研究,结果表明:尿素最佳施肥量新播苗为10 g/m2,换床苗为24 g/m2;以2次施氮为好;新播苗2次施氮最佳时期:第1次为6月上旬,第2次为6月下旬;换床苗2次最佳施氮时期:第1次为5月中下旬,第2次为6月上旬至下旬。
The correlative relationship was researched between many factors including nitrogen applying amount,applying times and time etc.and growth of new and transplant seedling of Picea asperata.The results showed： the optimum applying amount of carbamide is 10 g/m2 for new seedling,whereas for transplant seedling is 24 g/m2,and treating 2 times is the best： for new sowing seedling,one is early June and the other is late June;for transplant seedling,one is from middle June to late June;the second is from early June to late June.
出处
《甘肃林业科技》
2008年第1期9-12,共4页
Journal of Gansu Forestry Science and Technology
关键词
云杉苗期
施氮量
试验
Picea asperata seedling stage
amount of Nitrogen application
experiment
