摘要
华北落叶松是华北高寒地区主要造林树种之一。由于其种子发芽率低,幼苗生长弱,死苗率高,不易培育出大量壮苗满足造林需要。为促进种子发芽,提高幼苗抗逆性,我们从1986年以来研究雪藏对落叶松种子的发芽促进作用及其对幼苗抗性的影响。为进一步提高雪藏效果,又把一般雪藏法改为雪藏二次干湿交替法,并用这种方法与国内外常用的几种处理方法进行了对比试验。
This paper describes the sixteen treatments that have been adopted to stimulate the germination of Larix principis-rupprechtii seeds. Three treatments with better promoting effects on the seeds were finally selected:1. Prechilling in snow followed by dehydration and hydration treatments twice;2. 0.1%CaCl_2-12hours;3. 0.5%KNO_3-12 hours.In the three treatment, the effect of prechilling in snow followed by dehydration and hydration treatment twice was the best.In the process of this study, eight indices such as germination percent (GP) germination energy (GE), absolute germination percent (AGP), mean germination speed (MGS), fresh weight of young plant (FWYP), Ⅰ—Ⅲ plant percent (Ⅰ—Ⅲp%), germination value (GV) and germination index (GV) of each treatment were calculated separately. Finally, GI was adopted to comprehensively evaluate the promoting sole of the sixteen treatments in seed germination.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1989年第2期157-161,共5页
Scientia Silvae Sinicae
关键词
落叶松
种子
发芽
华北
Larix principis- rupprechtii Mayr., Prechilling in snow followed by dehydration and hydration treatments twice
Germination index
Synthetic index of seed germination
