伐桩储水下毛竹光合蒸腾特性  

Photosynthesis and transpiration characteristics of Phyllostachys edulis stands with water storage in their stumps

作　　者：张磊[1] 谢锦忠[1] 张玮[1] 冀琳珂 丁中文 陈胜[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400 [2]杭州市富阳区农业和林业局,浙江富阳311400

出　　处：《生态学杂志》2017年第3期655-663,共9页Chinese Journal of Ecology

基　　金：中央级公益性科研院所基本科研业务费专项资金(CAFYBB2016SY011);浙江省林业科技推广项目(2015B05);杭州市科技发展计划项目(20130432B75)资助

摘　　要：以伐桩储水毛竹(Phyllostachys edulis)林为研究对象,设置CK(0个伐桩储水)、T1(12个伐桩储水)和T2(18个伐桩储水)3个灌水量处理(样地大小:10 m×20 m),测定2年生毛竹叶片光合色素含量、光合蒸腾生理指标及主要环境因子,研究不同数量储水伐桩下毛竹叶片光合色素含量、光合蒸腾特性差异及其与环境因子间的关系。试验表明:(1)不同处理间各光合色素含量均表现为T2>T1>CK,Chla、Chlb、Car和Chla+Chlb含量的最大增幅分别为17.05%、14.49%、25.93%和17.19%。(2)不同处理下毛竹净光合速率与蒸腾速率日变化均为单峰曲线,均未出现"光合午休"现象,各处理间毛竹净光速率与蒸腾速率日变化均表现为T2>T1>CK。(3)增加储水伐桩后,12:00—14:00间引起毛竹净光合速率降低的因素由非气孔限制变为气孔限制。(4)增加储水伐桩后,毛竹净光合速率与各环境因子关联度大小的顺序发生了变化;不同处理下毛竹蒸腾速率与各环境因子关联度大小的顺序均不完全相同。研究表明,增加储水伐桩数量在一定范围内可使毛竹各光合色素含量增加,光合与蒸腾能力提高,光合产物积累增加,改善了毛竹的生长状况,且各光合色素含量、光合蒸腾能力与储水伐桩数量正相关。本研究为毛竹林节水灌溉措施的制定和培育生产提供了理论依据。Phyllostachys edulis（ Moso bamboo） stands with water storage in their stumps were selected. Three treatments were designed,i. e. 0 stump with water storage（ CK）,12 stumps with water storage（ T1） and 18 stumps with water storage（ T2） in a plot（ 10 m×20 m）,respectively. We measured the photosynthetic pigment content,photosynthesis and transpiration physiological indices of the 2-year-old culms and the major environmental factors. We then compared the differences in photosynthetic pigment content,photosynthesis and transpiration rates of Moso bamboo with different numbers of stumps with water storage as well as their relationship with environmental factors. The results showed that：（ 1） The photosynthetic pigment content was in order of T2 〉T1〉 CK,and the largest increment of Chla,Chlb,Car and Chla＋Chlb contents reached17.05%,14.49%,25.93% and 17. 19% respectively.（ 2） The diurnal variations of net photosynthetic and transpiration rates displayed in a pattern of unimodal curve. Both of them had no＂photosynthetic noon-break＂phenomenon and were in order of T2 〉T1〉 CK.（ 3） After increasing stumps with water storage,the reduction of net photosynthetic rate between 12： 00 and 14： 00 was not caused by non-stomatal factors but by stomatal limitation.（ 4） Compared with CK treatment,the correlations of the net photosynthetic rate of Moso bamboo with environmental factors inT1 and T2 ranked in different orders. In the three treatments,the correlations of transpiration rate of Moso bamboo with environmental factors were different. Our results indicated that increasing the stumps with water storage in a certain range could increase photosynthetic pigment content,improve the photosynthesis and transpiration ability,increase the accumulation of photosynthetic products and improve the growth of Moso bamboo. Besides,photosynthetic pigment content,photosynthetic and transpiration capacity had a positive correlation with the number of stumps. This study provides a theoretical su

关 键 词：毛竹 伐桩储水 净光合速率 蒸腾速率 环境因子 灰色关联分析 

分 类 号：S795.7[农业科学—林木遗传育种]