可降解有机高分子包膜尿素缓释效应研究

Effects Research on the Slow-release of Biodegradable Organic Polymer Coated Urea

通过油菜盆栽试验,以土壤脲酶活性、土壤碱解氮、植株全氮、维生素C、还原糖、油菜生物量为检测指标,对可降解有机高分子包膜尿素进行评价。结果表明,包膜尿素在作物需肥高峰期对土壤脲酶活性具有促进作用,对氮肥的延迟释放作用也处于较高水平;3种不同的包膜尿素处理均能提高氮肥利用率、油菜生物量、还原糖和Vc含量,且自制包膜尿素S1效果更明显,说明包膜尿素S1具有良好的缓释效果;在油菜生长不同时期,包膜尿素S2和S3对控制肥料养分释放和促进作物吸收方面各有所长。

Using pot experiments,the coated urea was evaluated based on the measurement of the soil urease activity,plant total nitrogen,vitamin C,reductive sugar and rape biomass.Compared with the control groups the coated urea were facilitated the activity of urease and the effects of release were at a high level.The results also show,compared with the control groups,the treatment could improve the content of the rape biomass,nitrogen use efficiency and reductive sugar content,and the S1 was more effective.The S1 had a good release effect and the others of the coated had their own merits in the control of nutrient release and absorption in different periods of rape growth.