CAJ | 학술논문

在温室内以长白落叶松幼苗为材料进行砂培试验，探讨了4种不同氮素浓度（1、4、8、16 mmol/L代号分别为N1、N4、N8、N16）处理对长白落叶松幼苗生物量以及根、茎、叶氮磷分配的影响。结果表明：①氮素供给浓度显著影响幼苗生物量，7、8、9月份均在N8水平下达最大，从7月份到9月份，叶片生物量占全株比例逐渐降低，而根系生物量所占比例逐渐增加。②随着供氮水平的提高，苗木根、茎、叶中氮浓度明显增加。生长末期根、茎、叶中氮浓度平均达到生长初期的1?46、1?48、1?17倍。不同氮处理下幼苗根、茎和叶全磷浓度呈现波动性变化。③幼苗体内氮贮量随着落叶松的生长呈明显上升趋势。9月份全株氮贮量比7月份平均增加了2?86倍。氮贮量分配在不同部位有很大不同，分配到叶片中的比例在7月份最高，平均为60％，而分配到幼苗根系中氮贮量的比例随苗木的生长而逐渐增加，在9月份相对值最高，达到41％。不同氮处理之间氮贮量分配比例相差不大。④长白落叶松幼苗根、茎、叶磷贮量变化规律与氮贮量一致，只是变化幅度低于氮。
재온실내이장백락협송유묘위재료진행사배시험，탐토료4충불동담소농도（1、4、8、16 mmol/L대호분별위N1、N4、N8、N16）처리대장백락협송유묘생물량이급근、경、협담린분배적영향。결과표명：①담소공급농도현저영향유묘생물량，7、8、9월빈균재N8수평하체최대，종7월빈도9월빈，협편생물량점전주비례축점강저，이근계생물량소점비례축점증가。②수착공담수평적제고，묘목근、경、협중담농도명현증가。생장말기근、경、협중담농도평균체도생장초기적1?46、1?48、1?17배。불동담처리하유묘근、경화협전린농도정현파동성변화。③유묘체내담저량수착락협송적생장정명현상승추세。9월빈전주담저량비7월빈평균증가료2?86배。담저량분배재불동부위유흔대불동，분배도협편중적비례재7월빈최고，평균위60％，이분배도유묘근계중담저량적비례수묘목적생장이축점증가，재9월빈상대치최고，체도41％。불동담처리지간담저량분배비례상차불대。④장백락협송유묘근、경、협린저량변화규률여담저량일치，지시변화폭도저우담。
The effects of different concentration of nitrogen treatments on the biomass, nitrogen and phosphorus partition in roots, stems and leaves of one-year-old Larix olgensis seedlings were studied by a sand culture experiment in green-house. The results suggested that N supply could significantly increase the seedling biomass. The biomass of roots, stems and leaves were the highest when 8 mmol/L nitrogen was applied in July, August and September. The biomass of leaves decreased gradually, while that of roots increased from July to September. The N concentrations increased significantly a-long with the N supply levels increasing. The mean N concentrations in roots, stems and leaves in the latter growth stage were 1.46, 1.48 and 1.17 times respectively more than that in the initial stage. The P concentrations fluctuated with the N levels change. The N stocks of whole plant increased markedly as the growth of plant, and it was 2.86 times more in Sep-tember than in July. The N allocation also varied in leaf, stem, and root. The proportion of N allocation in leaf was the highest in July (60% in average). The proportion of N allocation in root increased with plant growth, which was the high-est in September (41% in average). There was no obvious difference in N stocks among different N levels. The P stocks of the roots, stems and leaves were basically consistent with the N, but the variation scope was smaller than that of N.