【摘要】 对由南京化工大学制药与生命科学学院新研制的生物聚合高效吸水材料——γ-聚谷氨酸(γ-PGA)在农业上的应用前景进行了初步研究。试验结果表明,γ-PGA两次重复的平均吸水率可达到1108.4倍,比目前市售的聚丙烯酸盐类吸水树脂高2.85倍。γ-PGA对土壤水分的吸收率为30～80倍。γ-PGA的水浸液在土壤中有较强的保水力和较理想的释放效果,具有明显的抗旱促苗效应。用不同浓度PEG(6000)试剂(聚乙二醇)模拟土壤吸水力的种子发芽试验表明,γ-PGA有较强的吸水和保水能力,可明显提高小麦和玉米的发芽率。γ-PGA的直接拌种试验和γ-PGA水浸液的鲜切花保鲜试验对提高植物种子发芽率和延长保鲜期都有显著效果。为进一步发挥γ-PGA在农业上的应用价值,需要进一步开展植物—土壤—γ-PGA的水分平衡模型研究。更多还原

【Abstract】 The agricultural application perspect of (γ-PGA) (γ-polyglutamate),which was newly developed by the college of life science and pharmacy of Nanjing university of technology,is studied in this paper.The results show that the water absorption of (γ-PGA) is as higher as 1108.4 times,which is 2.85 times that of the polyacrylic acid sold in the market.The water absorption of (γ-PGA) in soil is 30~80 times.The water solution of (γ-PGA) has better moisture-holding and releasing abilities,and is more effective in fighting a drought and keeping a full stand of seedings.The seeding experiment was carried out under the condition of different GEP concentrations,the results show that the abilities of the water-absorbing and holding of (γ-PGA) are quite well and the seed dressing with (γ-PGA) is helpful to increase the germination percentage of wheat and corn.Mixing (γ-PGA) with seeds and using water saturated (γ-PGA) as antistaling material,will increase the germination percentage of the seeds and prolonge the freshness-keeping period of cutting flower.The research of the water balance model among plant,soil and (γ-PGA) should be carried out for the further application of (γ-PGA) in the field of agriculture.更多还原