CAJ | 학술논문

研究了水淹条件下狗牙根(Cynodon daetylon)繁殖体的形态特征和生物量的变化及其水淹后的恢复状况.结果表明,水淹深度的增加会诱导植株茎快速增高,而叶片数则明显下降.水淹时间对植株叶片数、茎直径、茎与根长比的影响显著,而对分枝数、茎长、根长、茎节数不显著.植株地上部生物量和总生物量随着水淹时间的延长而显著减少,但地下部生物量的变化不显著.所有实验处理的植株水淹后都能存活且恢复生长.但水淹对恢复期植株的生长仍有影响,植株的茎长、根长、分枝数、直径、叶片数、叶长、宽度以及叶的长宽比都随水淹时间的延长而显著减少,但茎节数与叶片数的差异不显著.根、茎、叶生物量和植株总生物量也随着水淹时间的延长而减少.实验表明狗牙根繁殖体通过延长茎长、改变叶形和减少生物量等方式对水淹显示出较强的耐受能力.
연구료수엄조건하구아근(Cynodon daetylon)번식체적형태특정화생물량적변화급기수엄후적회복상황.결과표명,수엄심도적증가회유도식주경쾌속증고,이협편수칙명현하강.수엄시간대식주협편수、경직경、경여근장비적영향현저,이대분지수、경장、근장、경절수불현저.식주지상부생물량화총생물량수착수엄시간적연장이현저감소,단지하부생물량적변화불현저.소유실험처리적식주수엄후도능존활차회복생장.단수엄대회복기식주적생장잉유영향,식주적경장、근장、분지수、직경、협편수、협장、관도이급협적장관비도수수엄시간적연장이현저감소,단경절수여협편수적차이불현저.근、경、협생물량화식주총생물량야수착수엄시간적연장이감소.실험표명구아근번식체통과연장경장、개변협형화감소생물량등방식대수엄현시출교강적내수능력.
The changes of Cynodon dactylon propagules under flooding were studied in morphology and biomass.Results showed that the stem length increased with increasing of flooding depth, whereas leaf number decreased obviously.Floodmg duration had significant effects on leaf number, stem diameter, and ratio of stem length to root depth, but not on branch number, stem length, root depth, stem node number.The aboveground biomass and total biomass of plants decreased sigmficantly with the prolongation of flooding time, but the underground biomass of plants changed little.Plants of all the treatments could survive and recovered after flooding.However, stem length, root depth, branch number, stem diameter, leaf number, leaf length, leaf width and ratio of leaf length to leaf width all decreased signifrcantly with the increase of flooding duration during recovery, so did the stem, leaf, root biomass and total biomass.But node number and leaf number of plants showed no significant difference among treatments.It suggested that Cynodon dactylon had strong toleration to flooding by prolonging stem, changing leaf shape and reducmg biomass.