对试种于浙江、福建、广东等3省不同纬度试验地的马来甜龙竹（泰国种源）的光合作用进行研究，分析引种驯化过程中竹子光合生理对环境变化的响应。结果表明：马来甜龙竹光合能力对纬度变化表现出适应性；净光合速率日变化类型、光合能力以及光响应特征等均会随纬度变化而不同。由于瑞安纬度最高，其光强、气温相对较低，马来甜龙竹的光合能力明显较华安和广宁弱。瑞安马来甜龙竹的净光合速率日变化呈“单峰型”，峰值在12：00出现，其他两地的呈现“双峰型”，分别在10：00和14：00出现，且首峰高于次峰。在瑞安的最大净光合速率均较低，仅约为其他两地的80 ％，且补偿点和饱和点都较低，饱和光强仅为71260 μmol／（m2〖DK〗·s）。华安马来甜龙竹的光补偿点最高，饱和点也较高。气孔导度是影响马来甜龙竹光合作用上午和午休的关键因子，下午则主要受非气孔因素影响。瑞安马来甜龙竹的气孔导度明显低于其他两地，这使瑞安马来甜龙竹的胞间二氧化碳浓度和净光合速率要低于其他两地。气孔因素引起华安和广宁马来甜龙竹的净光合速率午休，下午则因非气孔因素引起马来甜龙竹净光合速率降低。

Through the research on photosynthesis of bamboo species （Dendrocalamus asper）introduced from Thailand and planted in Zhejiang， Fujian and Guangdong provinces，their physiological adaptation response to different environments during domestication process were discussed. Results got in the 3 experimental fields were as follows： Photosynthetic capacity of D. asper was significantly different in three different regions. Its net photosynthetic rate （Pn）， phtosynthetic capacity， transpiration rate（Tr） etc. varied with the latitude，i.e.，the one in Rui′an where has the highest latitude and relatively low light and temperature showed lower photosynthetic capacity than those in Hua′an and Guangning. The diurnal change of Pn in Rui′an demonstrated a “singlepeak”， whose peak time appeared at 12:00 am， while the other two were “twin peaks”， whose peak time appeared at 10：00 and 14:00 respectively， and the first peak was higher than the latter. The photoresponse characteristic parameters also demonstrated that the photosynthesis capacity of D. asper in Rui′an was weaker than the other two places. The Pn,max in Rui′an was only about 80 ％ of that in Hua′an and Guangning. Rui′an′s light compensation point（Plc） and light saturation point（Pls） were also very low， only 38.4 and 712.60 μmol／（m2〖DK〗·s）respectively. Among three places， Plc and Pls of D. asper′s in Hua′an was the highest. In the morning， the Gs was the essential factor to Pn， comparing that Pn might be effected mainly by other factors in the afternoon. Gs in Rui′an was obviously lower than that in the other two regions， therefore， the intercellular CO2 concentration and Pn in Rui′an was the lowerest among the three. The dormancy of Pn in the noon time was mainly caused by the inhibition of Gs， while in the afternoon， the intercellular CO2 concentration kept high， as the low rate of Pn was caused by nonstomatal factors.