摘要
根据林木施肥模型，在南岭南坡山地对杉木幼林和中龄林进行了大面积的施肥试验与推广，结果表明，按照该模型的基本步骤进行实施，杉木中龄林可实现增产木材４５ｍ３／ｈｍ２，平均投入产出比接近达到１：８；杉木幼林施肥，可使林分提前１～３年郁闭，缩短了林木的生长周期，实践证明，本技术可操作性强，理论值与实际值差距小，经济、生态效益显著，可以在条件类似的杉木产区推广应用．
The proposed fertilization model has been successfully applied in wide areas of artifical China-fir forests in mountainous regions of Hunan and Guangdong provinces.Based on the concepts of site productivity and nutrient productivity,the established model provides available means with high accuracy for determination of increment of targeted-timber production and quantification of fertilizers for forests with different site index in different growing periods.Results show that fertilization fOllowing the proposed procedures greatly enhanced the timber production with an increment of 45 cubic meter per hectare and an economic input:output ratio up to 1: 4￣8 for forests after canopy closure,and accelerated the of tree growth and thus the canopy closure earlier for 1 to 3 yEars for the young forests.The proposed fertilization model can be widely used for various types of forests and different site conditions with high economic and social value.
出处
《中南林学院学报》
CSCD
1995年第1期1-8,共8页
Journal of Central South Forestry University
基金
国家自然科学基金
关键词
杉木
施肥模型
定量施肥
经济效益
林木
China-fir
fertilization models
fertilizer quantification
site productivity
nutrient productivity
economic efficiency.
