羧甲基壳聚糖促进次适温下小白菜种子的萌发

为了研究不同浓度羧甲基壳聚糖在次适温下对小白菜种子萌发的作用。采用0、0.05%、0.10%、0.20%和0.40%5个浓度羧甲基壳聚糖浸种处理小白菜种子,在次室温下(15±1)℃进行萌发试验,研究不同浓度羧甲基壳聚糖浸种对小白菜种子发芽特性的影响。羧甲基壳聚糖浸种处理可提高次室温下小白菜种子的发芽势、发芽率、发芽指数、活力指数、芽长和根长。以0.10%羧甲基壳聚糖浸种处理的效果最好,与对照相比,种子发芽势和发芽率分别提高30.43%和18.42%,发芽指数、幼苗鲜重和活力指数分别提高47.58%、30%和91.86%,芽长和根长分别提高30.41%和15.04%,均达到显著或极显著水平。促进次适温下小白菜种子萌发的最佳羧甲基壳聚糖浸种浓度为0.10%。该研究为羧甲基壳聚糖在蔬菜生产上的应用提供了科学依据。

Effect of Carboxymethyl Chitosan on the Seeds Germination of Brassica chinensis L. under Suboptymal Tem~ralme

The research on the effects of different concentrations of carboxymethyl chitosan on the seeds germination of Brassica chinensis L.under suboptimal temperature was done.Under suboptimal temperature(15±1)℃,B.chinensis seeds were soaked with 5 concentrations(0,0.05%,0.10%,0.20% and 0.40%) of carboxymethyl chitosan in germination test to study the effects of seeds soaked with different concentrations of carboxymethyl chitosan on the seed germination characters.Seeds soaked with carboxymethyl chitosan could increase the germination potential,germination rate,germination index,vigor index, bud length and root length under suboptimal temperature.The effect of seed soaking with 0.10% carboxymethyl chitosan was best,compared with CK,the germination potential and germination rate were increased by 30.43% and 18.42% respectively,germination index,fresh weight of seedlings and vigor index were increased by 47.58%、30% and 91.86% respectively,and bud length and root length were increased by 30.41% and 15.04% respectively,which all reached at the significant level or the extremely significant level.The optimum concentration of seed soaked with carboxymethyl chitosan to promote the germination of B.chinensis seeds was 0.10%.The research provided the scientific basis for the application of carboxymethyl chitosan in vegetable production.