| 青海云杉林不同结构特征对天然更新的影响 |
| |
| 引用本文： | 普布才仁,马明呈,付生艳,史玉敏,祁莲世,童翠芸.青海云杉林不同结构特征对天然更新的影响[J].防护林科技,2016(9):14-17. |
| |
| 作者姓名： | 普布才仁 马明呈 付生艳 史玉敏 祁莲世 童翠芸 |
| |
| 作者单位： | 1. 青海省玉树州治多县畜牧林业科技局,青海 玉树,815499;2. 青海省农林科学院,青海 西宁,810016;3. 青海大学,青海 西宁,810016 |
| |
| 基金项目： | 青海省天然林保护科研项目 |
| |
| 摘 要： | 通过对不同结构青海云杉林天然更新情况的调查分析,结果表明:不同生境条件下青海云杉林的树种组成、林分结构、生长状况和更新状况都有较大的差别;青海云杉的径级和高度决定着青海云杉林内不同树木个体间的竞争和分异状况,决定着不同高度级内的株数分布比例;青海云杉纯林中林分结构单一,更新良好;青海云杉+白桦混交林林分结构复杂,更新不良;青海云杉纯林下,拥有丰富的云杉种源,云杉种子饱满,保存云杉幼树数量多且生长状况好,能维持云杉种群的更新连续性和相对稳定性;林冠郁闭度为0.4时,更新情况最好;当郁闭度为0.7时,更新情况差。
|
| 关 键 词： | 大通 青海云杉 结构特征 更新 |
Effects of Different Structural Characteristics of Picea crassifolia Plantation on its Natural Regeneration |
| |
| Abstract: | Natural regeneration conditions of Picea crassifolia plantation with different structures were analyzed. Result shows that composition of species,stand structure,growth condition and regeneration condition of Piceacras-sifolia all have more differences under the different habitat condition;diameter class and height of Picea crassifolia not only determine their condition of individual competition and differentiation ;but also decide proportion of distri-bution of trees under different height level;stand structure of pure Picea crassifolia is single and its regeneration is optimal.Structure of mixed forest of Piceacrassifolia+Betulaplatyphylla is complex;regeneration is not optimal;there are rich provenance of spruce under pure forest of Piceacrassifolia,the seed of spruce are full,which preserves many quantity of sapling of spruce;the growth condition is optimal;it can maintain continuity of regeneration and relative stability of spruce population;crown density is 0.4,the situation of regeneration is optimal;crown density is 0.7,the regeneration situation is bad. |
| |
| Keywords: | Datong Forest Region Picea crassifolia structural characteristics regeneration |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
