摘要
本文通过对陕西省辛家山林区云杉不同等级苗木造林保存率的调查与分析,阐明了大等级云杉苗木造林保存率高的原因,为进一步大面积推广云杉营造技术提供了科学依据。
Investigations on the preservation rate of spruce afforestations by different grades of seedlings were carried out.The paper presented the reasons why higher grade of seedlings have higher preservation rate,providing scientific ground for afforestation.
出处
《陕西林业科技》
2009年第3期6-9,共4页
Shaanxi Forest Science and Technology
关键词
云杉
大等级苗木
造林
保存率
结果分析
Spruce
higher-grade seedlings
afforestation
preservation rate
result analysis
