CAJ | 학술논문

设置100％光照（L100）、50％光照（L50）、20％光照（L20）3种处理，研究不同光照处理对楠木属闽楠、浙江楠和紫楠3个树种苗木生长量和生物量积累和分配的影响。通过2年的试验，结果表明：（1）3个树种的苗高和地径在适度遮荫（ L50）条件下生长较好。叶宽、单叶平均面积、比叶面积均表现为随着光照强度的增加而减少的规律，各指标间则存在显著或极显著差异。（2）在不同光照处理下，总生物量趋势较为一致，在适度的遮荫条件下（L50），总生物量随着光强升高而增加，但光强再高总生物量反而下降。（3）茎质量比和叶质量比随着光照强度的增加而逐渐减少，根质量比则随着光照强度增加而增加。苗木质量指数在50％光照处理下最高，表现出显著或极显著差异。
설치100％광조（L100）、50％광조（L50）、20％광조（L20）3충처리，연구불동광조처리대남목속민남、절강남화자남3개수충묘목생장량화생물량적루화분배적영향。통과2년적시험，결과표명：（1）3개수충적묘고화지경재괄도차음（ L50）조건하생장교호。협관、단협평균면적、비협면적균표현위수착광조강도적증가이감소적규률，각지표간칙존재현저혹겁현저차이。（2）재불동광조처리하，총생물량추세교위일치，재괄도적차음조건하（L50），총생물량수착광강승고이증가，단광강재고총생물량반이하강。（3）경질량비화협질량비수착광조강도적증가이축점감소，근질량비칙수착광조강도증가이증가。묘목질량지수재50％광조처리하최고，표현출현저혹겁현저차이。
The growth, biomass accumulation and allocation of the seedlings of Phoebe bournei, Phoebe chekiangensis,and Phoebe sheareri belonging to Phoebe Nees in response to different light regimes ( 100%of full sunlight,L100;50%of full sunlight,L50;20%of full sunlight L20) were studied.The results of two years’ experiment showed that:(1) All the three species seedlings’height and diameter were the largest under L 50. The leaf width ,average area ,specific leaf area showed an increasing trend with the decrease light intensity ,and there were significant or very significant differences among these indexes .( 2) The total biomass showed a con-sistent trend under different light treatments;under moderate shade conditions ( L50 ), the total biomass in-creased with the increase of light intensity ,but decreased when the light intensity was beyond a threshold .(3) The stem mass ratio and leaf mass ratio decreased with the increase of light intensity ,the mass ratio of the root increased with light intensity .The seedling quality index had the highest value under 50%of light treatment and the differences were significant or extremely significant .