CAJ | 학술논문

对楸树、灰楸、滇楸3个树种1年生嫁接苗的净光合速率、叶面积和比叶重的垂直变化进行了测定，以探讨光合速率与苗木生长的关系。结果表明，楸树、灰楸、滇楸的净光合速率、叶面积和比叶重的垂直变化趋势基本相似，但树种之间的波动幅度上存在着差异，灰楸的总体光合速率较低，滇楸前期叶面积增加速度明显大于楸树和灰楸，而后期下降趋势明显低于楸树和灰楸，且下部叶片能维持较高的光合速率，最末叶序的比叶重都比刚展叶时的比叶重高。苗高生长量与除比叶重外的4个指标呈极显著正相关，光合指标与5个指标都呈极显著正相关。
대추수、회추、전추3개수충1년생가접묘적정광합속솔、협면적화비협중적수직변화진행료측정，이탐토광합속솔여묘목생장적관계。결과표명，추수、회추、전추적정광합속솔、협면적화비협중적수직변화추세기본상사，단수충지간적파동폭도상존재착차이，회추적총체광합속솔교저，전추전기협면적증가속도명현대우추수화회추，이후기하강추세명현저우추수화회추，차하부협편능유지교고적광합속솔，최말협서적비협중도비강전협시적비협중고。묘고생장량여제비협중외적4개지표정겁현저정상관，광합지표여5개지표도정겁현저정상관。
In order to investigate the relationship between photosynthetic rate and seedling growth , tests on net photosynthesis rate , leaf area and specific leaf weight of vertical changes was made for 3 kinds of Catalpa grafting seedlings, namely, Catalpa bungei, C.fargesii, C.duclouxii dode.The results showed that there were similar changing tendencies on the net photosynthesis rate , leaf area and specific leaf weight of vertical changes of these 3 tree seedlings , but there were different change ranges among tree species .Total photosynthetic rate of fargesii was low, while the increasing speed of early leaf area of C.duclouxii dode was larger than C.bungei and C.fargesii, and the later period declining trend was significantly lower than C.bungei and C.fargesii.The lower leaves could maintain higher photosynthetic rate , and the leaf weight of the phyllotaxis ’ end was higher the that of its newly o-pening .Except of the leaf weight , indicators of seedling growth had significantly positive correlations with the oth-er four indicators , and the photosynthetic indicators had significantly positive correlation with all five indicators .