壳聚糖成膜剂包衣性能及对油松种子萌发的影响

成膜剂是种衣剂的重要助剂及关键的功能性成分,壳聚糖的良好成膜性和生理活性,在种衣剂中具有重要应用价值。本文以油松为研究对象,通过制备0.2%和0.5%壳聚糖单膜溶液以及壳聚糖-聚乙烯醇和壳聚糖-纳米TiO2不同配比复合成膜剂,进行包衣性能测定和种子萌发安全性试验,筛选适合油松种子包衣的最佳配方。结果表明,对于油松种子壳聚糖成膜剂及复合成膜剂均能够快速成膜,其中复合成膜剂在成膜性、抗水溶能力以及包衣脱落率表现更优;不同成膜剂配方对种子发芽势、发芽率和活力指数影响显著,具有促进种子萌发作用;综合分析得出最佳成膜剂配方是0.2%壳聚糖+0.03 g纳米TiO2,最佳配方使成膜剂包衣性能有明显提高,并且与CK相比,发芽率、发芽势、发芽指数和活力指数分别提高了22%、64%、15%、59%。

Effect of Chitosan Composite on Germination of Pinus tabulaeformis Seeds and It' s Film-coating Agent Property Seeds

Seed coating film-forming agent is an important key functional additives and ingredients,scholars great concern to chitosan which has good film-forming and biological activity.This paper prepared 0.2% and 0.5% chitosan film-forming agent and different rate chitosan composite film,which chitosan were mixed in different proportions to polyvinyl alcohol and nano-TiO2.By film forming property and the coated seeds germination experiments,determined the best film-forming agent on pine seed.The results demonstrated that all the film-forming agents could fast filmed,and chitosan composite film could improve the film character and water resistance,coating loss rate analysis also showed that the coating strength significantly enhanced.Seed germination characteristics analysis showed that among the different ratio of film-forming agent significantly impact the seed germination,germination rate and vigor index.Composite indicators,the best formula was 0.2% CS+0.03-g nano-TiO2,compared with ck,the germination rate,germination energy,germination index and vigor index improved 22%,64%,15% and 59%,and the performance of film-forming properties was also in the best status.