CAJ | 학술논문

采用3种不同的氮素施肥处理(平均施肥、直线施肥和指数施肥)对尾巨桉苗木进行施肥处理，结果显示：指数施肥获得的苗木苗高和地径均大于其他施肥处理；指数施肥下尾巨桉苗木的叶、茎、根和地上部分干质量和整株生物量均显著大于其他施肥处理，指数施肥获得了更多的苗木生物量；3种施肥处理下，指数施肥的苗木净光合速率 Pn、气孔导读 Gs 和蒸腾速率 Tr 均为最大值，且显著大于其他处理。因此，3种施肥方法中，指数施肥方法最利于尾巨桉苗木的生长和光合作用。
채용3충불동적담소시비처리(평균시비、직선시비화지수시비)대미거안묘목진행시비처리，결과현시：지수시비획득적묘목묘고화지경균대우기타시비처리；지수시비하미거안묘목적협、경、근화지상부분간질량화정주생물량균현저대우기타시비처리，지수시비획득료경다적묘목생물량；3충시비처리하，지수시비적묘목정광합속솔 Pn、기공도독 Gs 화증등속솔 Tr 균위최대치，차현저대우기타처리。인차，3충시비방법중，지수시비방법최리우미거안묘목적생장화광합작용。
The effects of nitrogen fertilization of Eucalyptus urophylla × E. grandis seedlings by three different methods (mean fertilization, linear fertilization and exponential fertilization plus a control involving no applied fertilizer) were examined in this study. The height and ground diameter of seedlings given exponential fertilization were larger than those fertilized by the mean and linear methods whilst growth of seedlings that received no fertilization was markedly poorer than all fertilized seedlings. Leaf dry weights, stem dry weights, root dry weights, shoot dry weights and whole plant biomass of exponential fertilized seedlings were significantly higher those from other fertilization methods. Under the 3 fertilization methods, the net photosynthesis ratio (Pn), stomatal conductance (Gs) and transpiration rate (Tr) were similar and significantly higher than those of seedlings with no fertilization. Exponential fertilization generally proved the best method for E. urophylla ×E. grandis seedlings as it gave the highest growth of the 3 fertilization methods and matched the other methods on photosynthetic and physiological indicators.