盐碱地杂交榛光合作用日变化及其与环境因子的关系  

Diurnal dynamics on photosynthetic parameters of hybrid hazel in salinealkali land and its relation to environmental factors

作　　者：罗青红 史彦江 宋锋惠[1,2] 寇云玲[1,2] 韩强[1,2] 

机构地区：[1]新疆林科院造林治沙研究所,乌鲁木齐830063 [2]新疆农业大学林学与园艺学院,乌鲁木齐830053

出　　处：《果树学报》2013年第4期627-633,共7页Journal of Fruit Science

基　　金：2012年自治区公益性科研院所科研业务经费资助项目"盐碱地杂交榛生理生化特性研究";2011年中央财政林业科技推广示范资金项目"杂交榛良种繁殖圃建设与标准化栽培技术推广"

摘　　要：【目的】为了比较分析盐碱地6个杂交榛品种的光合参数日变化差异及其与环境因子的关系,【方法】以新疆察布查尔县盐碱地中栽植的杂交榛幼树为材料,对其生长旺盛期光合参数的日变化特征进行了测定,并对净光合速率与诸影响因子的相关性进行了分析。【结果】‘新榛3号’和‘新榛2号’的净光合速率(Pn)日变化呈"双峰"型曲线,其他品种为"单峰"型,一天中最高峰值均出现在12:00;‘新榛3号’的日光合累积值(PD)最大,显著高于其他品种,且该品种的日均水分利用效率(WUELD)(3.74μmol.mmol-1)也显著高于其他品种。出现光合午休的‘新榛2号’和‘新榛3号’,前者以受气孔限制为主,后者则主要受非气孔因素限制。6个品种的Pn与光合有效辐射(PAR)极显著正相关性;‘新榛3号’、‘新榛4号’及‘辽榛3号’3个品种的Pn与大气CO2浓度(Ca)显著正相关;气温(Ta)对Pn的影响表现为负相关;Pn与大气相对湿度(RH)和叶片蒸汽压亏缺(VpdL)有一定的相关性,但不显著。【结论】‘新榛3号’和‘新榛2号’对盐碱土壤表现出较其他品种更强的光合适应性。[Objective]This study was to compare the diurnal dynamics on photosynthetic parameters of six cultivars of hybrid hazel in saline-alkali land and its relation to environmental factors[Method]Taking two years old plants as experimental materials, the diurnal variation of photosynthetic parameters were mea- sured at Chabuchaer county in Xinjiang, and the correlations between net photosynthetic rate and various impact factors were analyzed. [Result]Pn of ＇Xinzhen 3＇ and ＇Xinzhen 2＇ showed ＂double-peak＂ curve in a day, other cultivars showed ＂single-peak＂ curve, and the highest peak appeared at 12：00 ;The PD （74.66 Ixmol＂ m-2＂ d-1） and WUED （3.74 p, mol-mmo1-1） of＇ Xinzhen 3＇ were significantly higher than that of other cultivars. Stomatal limitation was the main reason for emergence of midday depression in ＇ Xinzhe 2＇ but ＇ Xinzhen 3＇ was limited by non-stomatal factors. Pn of the six cultivars had significant positive corre- lation with PAR; the diurnal variation of photosynthetic rate in＇Xinzhen 3＇, ＇ Xinzhen 4＇ and ＇ Liaozhen 3＇ showed significant positive correlation with Ca,but negative correlation with Ta ; the correlation be- tween Pn and RH, VpdL were not significant. [Conclusion]The cuhivar＇Xinzhen 3＇ and ＇Xinzhen 2＇ had better adaptability to saline-alkali land on photosynthesis than other cuhivars.

关 键 词：杂交榛 光合作用 日变化 盐碱地 环境因子 

分 类 号：S664.4[农业科学—果树学]