CAJ | 학술논문

为了明确烟草漂浮育苗磷肥的适宜施用量，以烤烟品种“K326”为材料进行研究。结果表明，适量增施磷肥有利提高烟苗根系的长度、表面积、体积和根尖数，增强根系活力；极显著地提升烟苗的过氧化物酶（POD）、多酚氧化酶（PPO）和苯丙氨酸酶（PAL）的活性，增强了烟苗的抗逆性；显著地提高了烟苗叶绿素含量和光合性能，提升了烟苗的同化能力。因此，在烟草漂浮育苗过程中，施用15～18mg·株－1的磷素有利于培育根系健壮、抗逆性好、光合性能强的烟苗。
위료명학연초표부육묘린비적괄의시용량，이고연품충“K326”위재료진행연구。결과표명，괄량증시린비유리제고연묘근계적장도、표면적、체적화근첨수，증강근계활력；겁현저지제승연묘적과양화물매（POD）、다분양화매（PPO）화분병안산매（PAL）적활성，증강료연묘적항역성；현저지제고료연묘협록소함량화광합성능，제승료연묘적동화능력。인차，재연초표부육묘과정중，시용15～18mg·주－1적린소유리우배육근계건장、항역성호、광합성능강적연묘。
Effect of application of varied amounts of phosphorus (P) on the grow th and physiological characteristics of the seedlings of flue‐cured tobacco K326 was studied .It was found that the length ,tip ,surface area ,volume and rigor of the roots increased with increasing P at low levels .The activities of POD ,PPO ,PAL and stress resistance also increased significantly (P< 0.01) .In addition ,the P fertilizations enhanced the chlorophyll content and net photosynthetic rate ,as well as the assimilating capability of the seedlings .The amount of P appropriate for the seedling growth on a floating bed was determined to be 15 -18 mg · plant-1 .At this rate ,the development of tobacco seedlings was shown healthy with strong roots ,highly resistant to stresses and diseases ,and desirable photosynthetic functions .