摘要
经对吴旗县飞播沙棘进行生长观测,成林过程可分为出苗、成苗、幼林和成林四个阶段。自第三、四年即开始根蘖繁殖,成林面积和密度逐年增加。密度过大的8龄沙棘(2株/m^2以上)郁闭后,随着对阳光、土壤水分、养分的竞争,林木开始分化,被压木较多,出现枯梢、枯死株。文内还对沙棘幼林,成林抚育管理技术进行了探讨。
Through the observation of aerosown Hippophae rhamnoides cop- pice in Wuqi,the development process can be divided into:germination, seeding survive,development and maturity 4 stages,since root shoot prop- agation,mature coppice and density increase annualy from third or fourth year.After canopy closing in the 8-year-old coppice with high density,the overtopped,drytopped and rotted coppice emerged with competition of light, soil moisture and nutrient.The cultivation and management technique for H. rhamnoides young and mature coppice were also discussed.
出处
《陕西林业科技》
北大核心
1990年第2期1-4,共4页
Shaanxi Forest Science and Technology
