| 甘肃胡杨林分结构的研究 |
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| 引用本文： | 李毅,孙雪新.甘肃胡杨林分结构的研究[J].干旱区资源与环境,1994,8(3):88-95. |
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| 作者姓名： | 李毅 孙雪新 |
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| 作者单位： | 甘肃农业大学林学系 |
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| 摘 要： | 本文采用典型调查方法，经研究分析，揭示了甘肃河西走廊胡杨林分结构和胡杨生长进程规律。结果表明，胡杨生长成熟龄为：胸径２５－３０年，树高１５－２０年，材积４５－５０年。观察林分中，成熟林占８２．８３％，幼林仅为１７．１７％；林木以小径木占优，为８０．２％；林分内天然更新不良。胡杨林呈现出衰退状态。
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| 关 键 词： | 胡杨，生长进程，林分结构，衰退 |
STUDIES ON STAND STRUCTURE OF DIVERSIFORM-LEAVED POPLAR IN GANSU |
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| LiYi,SunXuexin,KangXiangyang.STUDIES ON STAND STRUCTURE OF DIVERSIFORM-LEAVED POPLAR IN GANSU[J].Journal of Arid Land Resources and Environment,1994,8(3):88-95. |
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| Authors: | LiYi SunXuexin KangXiangyang |
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| Abstract: | The paper,through the investigation of sample quads,reveals the stand structuresand the regularities of growing courses of diversiform-leaved poplar forests in Hexicorridor of Gansu. The results show that the mature years of the tree are 25-30 years forbreast diameter, 15-20 years for hight,45-50 years for volume. In the observed standingforests,mature trees made up 82.83%;and young growths only 17.17%;the majority aresmall-diameter trees,occupying 80.2%;the natural regeneration is inadequate and adegeneration is appearing. |
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| Keywords: | Diversiform-leaved Poplar Growing Course Stand Structure Decline |
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