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以当年生芙蓉葵钵育幼苗为试材,采用盆栽浇盐方法对芙蓉葵幼苗进行耐盐试验,设计0、2、4、6、8、10、12、14g/kg不同土壤含盐量的处理,研究盐分对芙蓉葵植株生长及根系生长的影响。结果表明:盐胁迫显著抑制了芙蓉葵地上部(茎、叶)、根部(粗根、细根)及植株总生物量的积累;盐胁迫抑制了芙蓉葵株高及基径的生长,土壤含盐量越高,株高和基径停止生长时间越早。盐胁迫下芙蓉葵的根冠比与对照相比均有不同增加,芙蓉葵地上部和根部的盐敏感指数和耐性指数随土壤含盐量的增加下降趋势明显,根系总长度、表面积与对照相比均有明显增加,总体积在低盐(0~6g/kg)胁迫下增加明显,高盐(8~14g/kg)胁迫下降低,但与对照相比变化不明显。证明了芙蓉葵根系在逆境下能够通过增加根系的生物量以提高根长和根系的表面积来适应盐胁迫环境,而根系的平均直径变化不大。
Hibiscus seedlings were used to cultivate the seedling in that year, potted with salt method to test the seedling of Hibiscus cannabinus, and to design 0,2,4,6,8,10,12,14 g / kg salt content in different soils The effects of salinity on the growth and root growth of WILD PLANTS Horsetail. The results showed that salt stress significantly inhibited the accumulation of aboveground parts (stems and leaves), roots (coarse roots and fine roots) and total plant biomass of salt-treated Hibiscus manshurica seedlings. Salt stress inhibited the growth of plant height and basal diameter, The higher salt content, plant height and base diameter stop growing earlier. Under salt stress, the root-shoot ratio of WILD WILD WIRELESS FLORA increased differently than that of the control. The salt sensitive index and the tolerance index of the upper and the root of Hibiscus mongolica decreased significantly with the increase of soil salinity. The total root length, The total volume increased obviously under the low salt (0 ~ 6g / kg) stress and decreased under the high salt (8 ~ 14g / kg) stress, but had no obvious change compared with the control. It was proved that Furong sunflower root could adapt to the salt stress environment by increasing the root biomass and increasing the root length and root surface under adverse conditions, while the average root diameter did not change much.