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生态学杂志 ›› 2021, Vol. 40 ›› Issue (3): 692-700.doi: 10.13292/j.1000-4890.202103.015

• 研究报告 • 上一篇    下一篇

毛竹及其变种细根化学计量特征

郭雯1,黄宏亮4,王锐1,杨畅1,雷刚1,2,3,漆良华1,2*   

  1. (1国际竹藤中心 国家林业和草原局/北京市共建竹藤科学与技术重点实验室, 北京 100102; 2国际竹藤中心安徽太平试验中心, 安徽太平 245700; 3安徽太平竹林生态系统国家定位观测研究站, 安徽太平 245700;4安吉县自然资源和规划局, 浙江安吉 313300)
  • 出版日期:2021-03-10 发布日期:2021-03-15

Stoichiometric characteristics of fine roots in Phyllostachys edulis and its varieties.

GUO Wen1, HUANG Hong-liang4, WANG Rui1, YANG Chang1, LEI Gang1,2,3, QI Liang-hua1,2*   

  1. (1International Centre for Bamboo and Rattan, Key Laboratory of National Forestry and Grassland Administration/Beijing Bamboo & Rattan Science and Technology, Beijing 100102, China; 2Anhui Taiping Experimental Station of ICBR, Taiping 245700, Anhui, China; 3National Positioning and Monitoring Station for Bamboo Ecosystem in Taiping, Taiping 245700, Anhui, China; 4AnjiNatural Resources and Planning Bureau, Anji 313300, Zhejiang, China).
  • Online:2021-03-10 Published:2021-03-15

摘要: 以安徽太平竹类植物种质资源保存库毛竹及其变种(花毛竹、黄槽毛竹、厚壁毛竹、金丝毛竹)为研究对象,分析比较毛竹及其变种3个年龄阶段(1、3、5年生)细根化学计量特征,探究毛竹及其变种细根养分策略。结果表明:1)毛竹及其变种细根化学计量特征主要受竹种的影响,年龄对毛竹及其变种细根化学计量特征的影响较小;2)毛竹及其变种细根的养分元素含量存在差异性,生长季花毛竹细根的全C、全N、全P含量较高,其他竹种则相对较低;毛竹细根C∶N、C∶P最高,毛竹及其变种细根N∶P差异性不显著;3)花毛竹、金丝毛竹细根的N和P含量具有显著的异速生长关系,毛竹及其变种的细根普遍受P元素的限制;其他竹种细根C、N、P养分元素之间异速生长关系不显著,说明其养分分配具有相似性;4)毛竹及其变种细根化学计量与土壤化学性质存在一定的相关性,细根C∶P主要受土壤有机质与全P的制约。因此,与土壤环境因素相比,毛竹及其变种细根化学计量特征受竹种遗传特性的限制作用更大;毛竹及其变种细根化学计量特征受其所处生长阶段的影响,不同竹种的养分元素利用策略存在差异性。

关键词: 变种, 年龄, 碳氮磷含量, 异速生长关系, 养分策略

Abstract: The stoichiometric characteristics of fine roots in Phyllostachys edulis and its varieties (P. edulis f.luteosulcata, P. edulis f.taokiang, P. edulis f. pachyloen, P. edulis f.gracilis) at three stages (1, 3, and 5 years old) were analyzed and compared, aiming to explore nutrient use strategies of P. edulis and its varieties. The results showed that: (1) The stoichiometric characteristics of fine roots in P. edulis were varietyspecific, while age had minor effects. (2) There were differences of nutrient contents in fine roots of P. edulis and its varieties. The contents of total C, total N and total P in fine roots of P. edulis f.luteosulcata were higher than other varieties. The C∶N and C∶P of fine roots of P. edulis were larger, and no differences of fine root N∶P across P. edulis and its varieties were found. (3) Fine root N and P contents in P. edulis and P. edulis f.gracilis showed a significant allometric relationship, and the fine roots of P. edulis and its varieties were generally limited by P availability. The allometric relationships among C, N and P elements in fine roots of other bamboo species were not significant, indicating a similar nutrient allocation pattern. (4) Fine root stoichiometry and soil chemical properties were closely correlated, with the C∶P of fine roots being mainly restricted by soil organic matter and total P content. Compared with soil environmental factors, fine root stoichiometric characteristics of P. edulis and its varieties were more limited by the genetic characteristics of bamboo species. The stoichiometric characteristics of fine roots of P. edulis and its varieties were affected by their growth stage. The nutrient use strategies differed across bamboo species.

Key words: variety, age, carbon, nitrogen and phosphorus concentration, allometric growth relationship, nutrient strategy.