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自制缓释氮肥释放特征及其肥效研究

Nitrogen Release Characteristics of Slow-release Fertilizer and Its Efficiency

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【作者】 赵庆兵邢尚军刘春生杜振宇刘方春段春华冯志敏

【Author】 Zhao Qingbing1,Xing Shangjun2,Liu Chunsheng1,Du Zhenyu2,Liu Fangchun1, Duan Chunhua2,Feng Zhimin1 (1College of Resources and Environment, Shandong Agricultural University, Tai’an 271018; 2Shandong Academy of Forestry, Jinan 250014)

【机构】 山东农业大学资源与环境学院山东省林业科学研究院山东农业大学资源与环境学院 泰安271018济南250014泰安271018

【摘要】 分别采用腐植酸和钙镁磷肥包裹颗粒尿素的方法自制了两种缓释氮肥,并通过室内土壤培养和盆栽实验研究了其氮素释放特征和肥效。结果表明,两种缓释氮肥较普通尿素均有明显的缓释效果,在室内培养24h后,尿素溶出率为56.78%,而两种自制缓释氮肥分别仅为15.28%和11.58%;以玉米为供试作物,两种自制缓释氮肥与普通氮肥(尿素)相比,均具有明显的增产效果,并显著提高玉米吸氮量和氮素表观利用率,其中以腐植酸包裹尿素(SRF2)效果最佳,较普通氮肥增产13.62%,氮素表观利用率达66.2%。

【Abstract】 Two slow-release nitrogen fertilizers (SRF) were self-produced by coating humic acid or fused calcium- magnesium phosphate on the surface of urea granule. Indoor soil culture and pot experiment were carried out to study the nitrogen release characteristic of SRF and its efficiency,respectively. The results of soil culture experiment showed that both two SRFs had significant effect of nitrogen slow release. After 24h’s incubation, the nitrogen release percentage of urea was 56.78%,however,which of SRFs was 15.28% and 11.58%, respectively. The results of pot experiment with corn showed that, compared with urea,SRFs significantly increased the yield and nitrogen uptake of corn as well as apparent nitrogen recovery, in which the SRF2 of coating urea with humid acid performed best.

【关键词】 缓释表观利用率肥效
【Key words】 Slow-releaseNitrogenApparent recoveryFertilizer efficiency
【基金】 山东省2003年科学技术发展计划攻关项目“新型经济林木缓释肥的研制与开发”(031030102)。
  • 【文献出处】 中国农学通报 ,Chinese Agricultural Science Bulletin , 编辑部邮箱 ,2007年08期
  • 【分类号】S145.6
  • 【被引频次】2
  • 【下载频次】190
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