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为探讨不同浓度海水处理对植物水分利用效率的影响,以南芋2号为试材,研究了不同浓度海水浇灌对菊芋幼苗生长发育、光合特性及水分生理的影响。结果表明:随着浇灌海水的浓度的提高,株高和地下部生物量呈现出相似的变化趋势,即先增加后减少;净光合速率在海水浓度为10%时显著高于其他处理,而气孔导度同样在10%时具有最大值。低浓度的海水处理有助于提高植物水分利用效率;丙二醛含量在低浓度时差异不显著,40%时其含量明显升高。在叶片持水力上,随着海水浓度的增加,叶片保水性逐渐增加;土体上下盐分含量随着海水浓度的增加而增加,且上层盐分含量高于下层。
In order to investigate the effects of different concentrations of seawater on plant water use efficiency, Nanlu No.2 was used as experimental material to study the effects of different concentrations of seawater on the growth, photosynthesis and water physiology of Jerusalem artichoke seedlings. The results showed that with the increase of seawater concentration, the biomass of plant height and subsurface showed a similar trend, that is, the biomass increased first and then decreased; the net photosynthetic rate was significantly higher than that of other treatments when the seawater concentration was 10% Conductivity also has a maximum at 10%. Low concentrations of seawater treatment can improve plant water use efficiency; malondialdehyde content at low concentrations was not significantly different, 40% significantly increased. With the increase of seawater concentration, the water retention of leaves increased with the increase of seawater concentration. The salt content of soil increased with the increase of seawater concentration, and the salt content of the upper layer was higher than that of the lower layer.