CAJ | 학술논문

为了给芙蓉葵在滨海盐渍地播种育苗和重盐碱地园林绿化应用提供科学依据，分别以芙蓉葵种子、幼苗和1 a生越冬根为试材，在人工模拟盐胁迫强度条件下，研究了不同浓度 NaCl溶液处理对芙蓉葵种子发芽期和苗期耐盐性，以及越冬根萌生苗耐盐性的影响。结果表明：0.2％盐度胁迫会促进芙蓉葵种子萌发，随着NaCl浓度的增大，种子初始萌发时间延长，发芽率和萌发初期生长均受到抑制，且抑制程度均随盐胁迫浓度的增大而逐渐增强，盐度＞0.6％后会显著抑制种子萌发，但每天给予12 h光照可以显著提高发芽率；盐胁迫会抑制芙蓉葵幼苗生长，且抑制作用随盐胁迫浓度的增大而逐渐增强，不影响其正常形态性状的最高盐胁迫浓度为0.6％，当盐胁迫浓度超过该阈值后，会使芙蓉葵幼苗的观赏价值明显降低；芙蓉葵越冬根发芽期的耐盐能力较强，盐度＞1.2％后成活率显著下降。根据生理指标测定和幼苗外观形态观测结果，推断芙蓉葵种子萌发和幼苗生长的耐盐阈值是0.6％，越冬根正常萌发的耐盐阈值是1.2％。
위료급부용규재빈해염지지파충육묘화중염감지완림녹화응용제공과학의거，분별이부용규충자、유묘화1 a생월동근위시재，재인공모의염협박강도조건하，연구료불동농도 NaCl용액처리대부용규충자발아기화묘기내염성，이급월동근맹생묘내염성적영향。결과표명：0.2％염도협박회촉진부용규충자맹발，수착NaCl농도적증대，충자초시맹발시간연장，발아솔화맹발초기생장균수도억제，차억제정도균수염협박농도적증대이축점증강，염도＞0.6％후회현저억제충자맹발，단매천급여12 h광조가이현저제고발아솔；염협박회억제부용규유묘생장，차억제작용수염협박농도적증대이축점증강，불영향기정상형태성상적최고염협박농도위0.6％，당염협박농도초과해역치후，회사부용규유묘적관상개치명현강저；부용규월동근발아기적내염능력교강，염도＞1.2％후성활솔현저하강。근거생리지표측정화유묘외관형태관측결과，추단부용규충자맹발화유묘생장적내염역치시0.6％，월동근정상맹발적내염역치시1.2％。
In order to provide a scientific basis for Hibiscus moscheutos sowing and raising seedlings in the coastal saline soil and landscaping applications in heavy saline soil , taking Hibiscus moscheutos seeds, seedlings and overwintering roots as test materials, the effects of different concentrations of NaCl solution treatments on Hibiscus moscheutos seeds germination and seedlings salt tolerance , and overwintering roots sprouting salinity tolerance were studied in the artificial simulating salt stress conditions.The results showed that 0.2% salinity stress could promote Hibiscus moscheutos seed germination, with the increasing of NaCl concentration , the initial time of seed germination was extended, the germination rate and germination growth were inhibited and the degree of inhibition was increased gradually, more than 0.6% salinity stress significantly inhibited the seed germination , but given 12 h light every day could significantly increase the germination rate.Salt stress could inhibit the growth of Hibiscus moscheutos seedlings, and the inhibition was increased gradually with the increase of salt concentration , the highest salinity which did not affected the normal morphological characters was 0.6%, when the NaCl concentration more than the threshold concentration, the ornamental value of Hibiscus moscheutos seedlings was decreased significantly.The salt tolerance of Hibiscus moscheutos overwintering root was better during germination period, the survival rate was significantly decreased when the NaCl concentration was more than 1.2%.According to the observation results of the determination of physiological index and seedling morphology , the salt tolerance threshold of the Hibiscus moscheutos seed germination and seedling growth was 0.6%, the salt tolerance threshold of overwintering root normal germination was 1.2%.