植物生态学报 ›› 2014, Vol. 38 ›› Issue (3): 289-297.DOI: 10.3724/SP.J.1258.2014.00026

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施肥对毛竹种群不同年龄分株间胸径大小关系的影响

王意锟1, 金爱武1,*(), 朱强根1, 邱永华2, 季新良3, 张四海1   

  1. 1丽水学院, 浙江丽水 323000
    2遂昌县林业局, 浙江遂昌 323300
    3龙泉市林业局, 浙江龙泉 323700
  • 收稿日期:2013-09-22 接受日期:2013-12-09 出版日期:2014-09-22 发布日期:2014-02-27
  • 通讯作者: 金爱武
  • 作者简介:*E-mail: kinaw@zafu.edu.cn
  • 基金资助:
    基金项目中央财政林业科技推广项目(2009TS-001);丽水市公益性技术应用项目(2013JYZB09)

Effects of fertilization on the relations of diameter at breast height between different-aged ramets of Phyllostachys edulis population

WANG Yi-Kun1, JIN Ai-Wu1,*(), ZHU Qiang-Gen1, QIU Yong-Hua2, JI Xin-Liang3, ZHANG Si-Hai1   

  1. 1Lishui College, Lishui, Zhejiang 323000, China
    2Suichang Forestry Bureau, Suichang, Zhejiang 323300, China
    3Longquan Forestry Bureau, Longquan, Zhejiang 323700, China
  • Received:2013-09-22 Accepted:2013-12-09 Online:2014-09-22 Published:2014-02-27
  • Contact: JIN Ai-Wu

摘要:

克隆植物不同年龄分株间可以通过生理整合作用相互传递资源, 实现资源共享。施肥可以改变林地资源状况, 进而可能影响分株间的整合作用及不同年龄分株间的生长关系。该文采用标准主轴(SMA)估计法和多元回归分析, 对不同施肥管理下大型克隆植物毛竹(Phyllostachys edulis)种群不同年龄分株(1年生分株、3年生分株和5年生分株)间的胸径(DBH)关系进行了研究, 探讨毛竹不同年龄分株DBH大小关系对施肥的响应。结果表明: 连续5年施肥有效地增加了毛竹1年生分株的DBH, 而施肥1年处理下, 1年生分株DBH与3年生分株和5年生分株平均DBH差异不显著(p > 0.05)。1年生分株与3年生分株和5年生分株DBH之间的SMA斜率为0.88-1.10, 均与1.00不存在显著差异(p > 0.05), 表现为等速生长关系。施肥1年和连续施肥5年没有改变不同年龄分株DBH之间的SMA斜率, 但连续5年施肥导致SMA的y轴截距显著增大(p < 0.001), 即在3年生分株和5年生分株DBH相同的情况下, 连续5年施肥使1年生分株具有更大的DBH增长量。采用多元线性逐步回归分析发现, 毛竹1年生分株的DBH大小在很大程度上受3年生分株DBH大小的影响, 而连续5年施肥可增强5年生分株对1年生分株DBH大小的影响。

关键词: 异速生长, 克隆植物, 毛竹, 大小-年龄关系, 标准主轴(SMA)估计法

Abstract:

Aims Clonal plants are physiologically integrated, allowing translocation of photosynthates, water, nutrients and other substances between connected ramets within a clone. This suggests that the sizes of ramets of different ages may be correlated. So far, however, little is known about the effects of fertilization on the size relationships between ramets of different ages. In this study, we aim to examine how fertilization affects the relations of diameter at breast height (DBH) between ramets of different ages in the giant clonal bamboo Phyllostachys edulis.
Methods We established 112 20 m × 30 m plots of P. edulis in Longquan City, Zhejiang Province, China. Among them, 46 plots were fertilized only in 2008, 49 fertilized in five consecutive years from 2004 to 2008, and 17 unfertilized (the control). We measured DBH of ramets of one, three and five years old in each plot in 2009. The relations of DBH between ramets of different ages in different fertilization treatments were examined using allometric scaling by the standardized major axis (SMA) analysis, and that were also analyzed by multiple linear regression.
Important findings The DBH of the 1-year-old ramets was significantly greater than that of the 5-year-old ones in the 5-year fertilization plots, while no significant difference was found in the 1-year fertilization plots. Under different fertilization treatments, the slopes of SMA (0.88-1.10) for the relations of DBH between ramets of one, three and five years old were not significantly different from 1.00 (p > 0.05), suggesting isomeric growth relationships. Compared to the control (unfertilization), fertilization in one or five years did not change the slope of SMA. However, fertilization in five years increased the intercept of SMA, indicating that continuous fertilization could result in greater DBH increment in the 1-year-old ramets. The multiple linear stepwise regression analysis indicated that 3-year-old ramets could greatly influence DBH of the newly produced ramets, and that the effect of DBH of the 5-year-old ramets on that of the 1-year-old ramets increased after five years of continuous fertilization.

Key words: allometric growth, clonal plant, Phyllostachys edulis, size-age relationship, standardized major axis (SMA) analysis