南京林业大学学报（自然科学版）2017，Vol.41Issue(2)：41-46,6.DOI:10.3969/j.issn.1000-2006.2017.02.007
毛竹向撂荒地扩展过程中叶功能性状变化
Leaf functional traits of moso bamboo during its expansion into abandoned land
摘要
Abstract
[Objective]Elucidate differences in leaf functional traits of moso bamboo along a gradient of moso bamboo ex?pansion into abandoned land.[Method] We compared the leaf functional traits of moso bamboo at different stages of ex?pansion, and explored the adaptability and survival strategy during expansion. [Result]The specific leaf area ( SLA) was highest (2.16 m2/kg) during the middle stage of expansion. The second highest SLA (1. 83 m2/kg) was recorded during the final stage of expansion, whereas the lowest SLA (1.80 m2/kg) was recorded during the initial stage of ex?pansion. The leaf dry matter content ( LDMC) was different in different stages of expansion for moso bamboo of different age. LDMC of one?year?old moso bamboo decreased with moso bamboo expansion, whereas the LDMC of three and five years old moso was increased. There was no significant difference with regards the leaf carbon content ( LC) , leaf nitro?gen content ( LN) and C/N during the different stages of moso bamboo expansion. There was a significant decrease in leaf phosphorus content (LP) with expansion:1.70 g/kg in the initial stage, 1. 53 g/kg in the middle stage, and 1.15 g/kg in the final stage. There was a significant increase in C/P and N/P with expansion:C/P was 264.06, 292.33 and 392.03, and N/P was 12.70, 13.62 and 17.16, in the initial, middle and final stages, respectively. [Conclusion]That the main leaf functional traits of moso bamboo changed during the course of its expansion into abandoned land, and that there was a trade?off among the leaf functional traits with this expansion. moso bamboo adapts to the disturbed environ?mental conditions during the initial stage of expansion by decreasing SLA and N/P , and increasing LP . The N/P of moso bamboo increased with its expansion when the forest environment was formed, and the growth of moso bamboo was changed from the N constraints to P constraints. Moreover, the results may reveal that moso bamboo has an obvious ad?vantage in competition because of its uneven age structure and the fact that different?aged bamboo has different trends in leaf functional traits during its expansion.关键词
毛竹扩展/撂荒地/叶功能性状/叶养分元素Key words
moso bamboo expansion/abandoned land/leaf functional trait/leaf nutrient element分类
农业科技引用本文复制引用
刘广路,范少辉,蔡春菊,刘希珍..毛竹向撂荒地扩展过程中叶功能性状变化[J].南京林业大学学报（自然科学版）,2017,41(2):41-46,6.基金项目
国家林业公益性行业科研专项项目(201404408) （201404408）
