山西太岳山华北落叶松人工林种内与种间关系

生态学杂志

山西太岳山华北落叶松人工林种内与种间关系

周文嵩¹,韩海荣^1*,康峰峰¹,程小琴¹,吴然¹,杨杰²,田平¹,黄良帅^1#br#

(¹北京林业大学省部共建森林培育与保护教育部重点实验室，北京 100083； ²山西省太岳山国有林管理局好地方林场，山西沁源 046505)

出版日期:2017-02-10 发布日期:2017-02-10

Intra and interspecific interactions of Larix principisrupprechtii plantation in Mt. Taiyue, Shanxi, China.

ZHOU Wen-song¹, HAN Hai-rong^1*, KANG Feng-feng¹, CHENG Xiao-qin¹, WU Ran¹, YANG Jie², TIAN Ping¹, HUANG Liang-shuai^1#br#

(¹Key Laboratory of Ministry of Forest Cultivation and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China; ^2Haodifang Forest Farm, Forestry Administration of Shanxi Taiyue Mountain, Qinyuan 046505, Shanxi, China).

Online:2017-02-10 Published:2017-02-10

摘要/Abstract

摘要： 通过对山西省太岳山15年生华北落叶松人工林群落的调查，采用生态位理论和Hegyi单木竞争模型对华北落叶松林的种内及种间关系进行了分析。结果表明：(1)群落中华北落叶松(Larix principisrupprechtii)和白桦(Betula platyphylla)的生态位宽度较大，生态位相似性比例较高，但生态位重叠值较低，说明目前环境资源较充裕，群落内资源利用性竞争较弱；(2)通过Hegyi竞争指数计算发现，该地区华北落叶松竞争范围为6 m，竞争强度排序为白桦>华北落叶松(种内)>红皮云杉(Picea koraiensis)>黄花柳(Salix caprea)，随着胸径的增大，华北落叶松受到的竞争强度逐渐减小；(3)幂函数对竞争模型的非线性拟合结果最为理想，所得的拟合模型能较为准确地预测不同径级华北落叶松的竞争强度情况，通过模型预测发现，华北落叶松在胸径生长达到60～70 cm之后，竞争强度变化不大，群落达到较稳定状态；(4)群落Godron稳定性指数为39/61，距离稳定点20/80较远，说明群落的稳定性较差，未来会产生较激烈的竞争；(5)提出一种新的竞争范围划定方法，采用竞争样圆内单位面积上每株树的平均竞争强度来计算竞争范围，结果更为直观、精确，可以准确地划分竞争的内圈和外圈。

Abstract:

In this study, the intraspecific and interspecific relationships of a 15-year-old Larix principisrupprechtii plantation were analyzed in Mt. Taiyue, Shanxi province, by using niche theory and Hegyi individual competitive index model. The results showed that: (1) niche breadth for L. principisrupprechtii and Betula platyphylla were larger than that of other tree species. There was a high proportion of niche similarity but low degree of overlap between L. principisrupprechtii and B. platyphylla, indicating the abundant environmental resources and the existence of low resource utilization competition. (2) By the calculation for Hegyi competition index, we found that the effect range of competition of L. principisrupprechtii in this area was 6 meters. The competition intensity to L. principisrupprechtii ranked as B. platyphylla > L. principisrupprechtii (intraspecific) > Picea koraiensis > Salix caprea. The competition intensity of L. principisrupprechtii decreased with increasing the diameter of breast height (DBH). (3) The nonlinear fitting result of the power function was optimum to predict the competition intensity of L. principisrupprechtii with different DBH. The model prediction showed that the community reached a stable stage and the competition intensity changed insignificantly at DBH of 60-70 cm for L. principisrupprechtii. (4) The Godron stability index was 39/61, which was far away from the stable point 20/80. This result manifested the high competition intensity in future; (5) A new partition method defining the effect range of competition was proposed, which could divide inside radius and outside radius accurately by calculating average competitive intensity of each tree in the unit area of competitive sample circle. The method would provide a more visual and precise result.

周文嵩1,韩海荣1*,康峰峰1,程小琴1,吴然1,杨杰2,田平1,黄良帅1. 山西太岳山华北落叶松人工林种内与种间关系[J]. 生态学杂志.

ZHOU Wen-song1, HAN Hai-rong1*, KANG Feng-feng1, CHENG Xiao-qin1, WU Ran1, YANG Jie2, TIAN Ping1, HUANG Liang-shuai1. Intra and interspecific interactions of Larix principisrupprechtii plantation in Mt. Taiyue, Shanxi, China.[J]. cje.