灌木柳盐土扦插对抗盐立苗基质的响应

Response of Shrub Willow Solonchak Cultivation to Salt-resistant and Seeding-grow Matrixes

[目的]探索灌木柳盐土扦插对抗盐立苗基质的响应,为灌木柳沿海滩涂种植并形成栽培技术体系提供理论支撑。[方法]采用盆栽模拟试验,设0、500、1 000、1 500、2 000 g 5个处理水平的抗盐立苗基质用量,研究不同基质用量对灌木柳扦插穗新萌发枝条的生长情况、成活率及盐害指数的影响。[结果]在基质用量1 500 g范围内,随着抗盐立苗基质用量的增加,新萌发枝条高度增加。穴施基质用量1 000 g以上对萌发枝条叶片保持稳定的叶绿素含量起着积极作用。随着抗盐立苗基质用量的增加,萌发枝条成活率明显提升,成活期限也明显加长,基质用量达1 500 g以上,灌木柳扦插枝条均能存活58 d以上。盐害指数随基质用量的增大明显降低,基质用量2 000 g处理盐害指数在扦插后58 d才有所增加。[结论]抗盐立苗基质的应用能够促进灌木柳盐土扦插穗萌发枝条的生长,减缓盐分胁迫对萌发分枝的危害,维护叶片叶绿素含量的稳定。穴施抗盐立苗基质1 500 g以上能够明显降低盐害指数,提升灌木柳扦插穗的存活率。

[Objective] To explore the response of shrub willow solonchak cultivation to salt-resistant and seeding-grow matrixes, and to provide theoretical support to grow shrub willow in coastal tidal flats and form cultivation technique system. [ Method] The potted simulation test was carried out, setting up 0,500,1 000,1 500,2 000 g doses of salt-resistant and seeding-grow matrixes,the shoot growth,survival rate and salt stress index of shrub willow cuttings ear new germinated branches were studied. [ Result] The height of new germination branches grew with the increase of salt-resistant and seeding-grow matrixes amount within 1 500 g range per hole. Applying matrixes more than 1 000 g per hole plays a significantly positive role in germination branches leaves remained stable chlorophyll content. With the increase of salt-resistant and seeding-grow matrixes application amount per hole ,the survival rate of germination branches was significantly improved and the survival time was also obviously lengthened. The branches in the process of the experiment can survive more than 58 d when application amount reach to 1 500 g per hole. The salt stress index was significantly lowered with the increase of salt-resistant and seeding-grow matrixes application amount per hole. Salt stress index of treat- ments with 2 000 g matrixes was just increased after sowing 58 d. [ Conclusion ] The application of salt-resistant and seeding-grow matrixes can promote the growth of shrubs willow germination branches, reduce the harm of salt stress on germination branches, maintain the stability of the leaf chlorophyll content. Applying salt-resistant and seeding-grow matrixes more than 1 500 g per hole can significantly reduce the salt stress index ,and upgrade the survival rate of shrub willow.