生态学报2017，Vol.37Issue(7)：2307-2314,8.DOI:10.5846/stxb201512012407
不同经营方式下毛竹光合特性分异研究
Photosynthetic characteristics of Phyllostachys edulis under different management modes
摘要
Abstract
Forest management modes closely relate to the available light in a forest,its temperature,moisture,and nutrient status,which all influence photosynthesis.To investigate how photosynthetic characteristics respond to different management modes,we studied five bamboo forest types in Anhui Province,including one type extensively managed (Ⅰ) scarce any human disturbance,one type moderately managed (Ⅱ) some human cutting planless and three types intensively managed,which were amount of shoot dug 10％-15％ (Ⅲ),amount of shoot dug 15％-20％ (Ⅳ) and amount of shoot dug less 10％ with fertilizering every September (Ⅴ).The results showed that 1) there was a significant difference between leaf area index (LAI) and soil and plant analyzer development (SPAD).Moreover,the variability of LAI and SPAD values increased with increasing intensity of management.2) The variation in light-response curves was similar under different management modes.In addition,a non-rectangular hyperbola was the best model for fitting the light-response curve data,with correlation coefficients greater than 0.96.Furthermore,with increasing photosynthetically active radiation (PAR),net photosynthetic rate (Pn),stomatal conductance (Cd),and transpiration rate (Tr) increased,but intercellular CO2 concentration (Ci) decreased.Photosynthetic characteristics had higher values in forests under non-intensive management (mode Ⅰ and Ⅱ) than in forests with intensive management (mode Ⅳ and Ⅲ).However,photosynthetic characteristics of other forests with intensive management (mode Ⅴ) showed a similar tendency to those observed in mode Ⅰ and Ⅱ.This suggests that intensive management with appropriate nutrient addition can effectively improve the light use efficiency of bamboo forests.3) Bamboo forests had a more adaptable and higher maximum photosynthetic capacity under management modes that resulted in maximum or minimum value combinations of light saturation point (LSP),light compensation point (LCP) and dark respiration rate (Rd).Therefore,we conclude that non-intensive forest management (mode Ⅰ) and intensive management that includes nutrient addition (mode Ⅴ) are the best management modes for generating bamboo forests with a high photosynthetic capacity.关键词
粗放经营/集约经营/光合特性/净光合能力/叶面积指数/叶绿素含量Key words
extensive management/intensive management/photosynthesis/net photosynthetic capacity/leaf area index/chlorophyll content引用本文复制引用
封焕英,范少辉,苏文会,杜满义,刘广路,毛超..不同经营方式下毛竹光合特性分异研究[J].生态学报,2017,37(7):2307-2314,8.基金项目
基本科研业务费项目(1632014011) （1632014011）
国家林业局948项目(2014-4-58) （2014-4-58）
华林中心主任基金项目(ECFNC2014-06) （ECFNC2014-06）
