丸粒化玉米种子的保水抗旱性能研究  

Study on the water retention and drought resisting of the pelleted corn seed

作　　者：喻少帆[1] 李嘉诚[2] 冯玉红[2] 

机构地区：[1]北京市农林科学院玉米研究中心,北京100097 [2]海南大学材料与化工学院,海南海口570228

出　　处：《广东农业科学》2012年第16期5-6,共2页Guangdong Agricultural Sciences

摘　　要：以丹大5号玉米种子为材料,以硅藻土为主要填料,通过粘合剂将保水剂裹附在玉米种子表面,制备出丸粒化的玉米种子。以土壤为培养基质,模拟田间生长环境,考察了丸粒化玉米种子的发芽率和水分蒸发量。结果表明,珠种子∶硅藻土∶保水剂∶粘合剂=100∶12∶4∶12(质量比)时,丸粒化玉米种子表面均匀,保水剂粘合较牢,发芽率为100%,水分蒸发量为47.34 g、明显低于空白对照组(55.83 g),具有保水功能。通过SEM表征,发现丸粒化的玉米种子表面会形成一层多孔膜,当粘合剂用量小于硅藻土时,气孔较多,基本不影响发芽率,但保水剂容易从玉米种子表面脱附;当粘合剂用量大于硅藻土时,气孔较少,降低了玉米种子的发芽率。The pelleted corn seeds were prepared by using the tackiness agent to bound the mixture of water retainging agent and diatomite on the surface of NO.5 Dan corn seeds. The obtained seeds were then planted in the soil in the artificial intelligent climate incubater and the germination rate of corn seed and the amount of water evaporation were investigated. The pelleted corn seeds （the mass ratio of the corn seed ,the diatomite, the water retaining agent and the tackiness agent was 100：12：4：12 ） were exhibited the best behaviour with uniform distribution of the water retainging agent, 100% germination rate and the amount of water evaporation （47.34 g） was obviously less than that of comparation experiment （55.83 g）. The obtained seeds were therefore investigated by SEM characterization and it was found that the dosage of the tackiness agent than that of diatomite would produce the more pores of the seeds, which had little influence of the germination rate of corn seed. Otherwise, the less pores would lead to the decrease of the germination rate of corn seed. Additionally, the water retainging agents were easily desorpted from the surface of the corn seeds.

关 键 词：玉米 保水剂 粘合剂 硅藻土 丸粒化 抗旱 

分 类 号：S513.01[农业科学—作物学]