摘要
采用土柱淋溶方法,研究了磷钾包氮型复混肥料氮素的缓释性能。结果表明,前10 d淋出氮素以铵态氮为主,复混肥处理较普通化肥处理铵态氮每次的淋出量低14.33%-77.41%;之后淋出氮素以硝态氮为主,复混肥处理较普通化肥处理每次硝态氮的淋出量低2.95%-19.05%,30 d后情况出现逆转趋势;淋洗期内复混肥处理的氮素累积淋出量始终低于普通化肥处理,但相对差异逐渐减小,由开始的54.31%减小到淋洗结束时的12.24%。表明采用以颗粒尿素为核心、以粉状磷钾肥及矿物吸附材料为包裹物生产工艺生产的复混肥料,具有明显的氮素缓释效果。
Nitrogen slow-releasing effect was studied for a kind of compound fertilizer with its nitrogen coated by phosphorus and potassium fertilizer,using soil column leaching method.Results showed that in the first 10 days,the N form in the leachate was mainly ammonium,and the leached NH4-N each time for the compound fertilizer treatment was 14.33%-77.41% lower than that of the common fertilizer treatment.After that,NO3-N became the main N form in the leachate,and the leached NO3-N each time for the compound fertilizer treatment was 2.95%-19.05% lower than that of the common fertilizer treatment.30 days later from beginning,NO3-N amount in the compound treatment leachate began to exceed the common fertilizer treatment.The accumulated total N in the leachate in the whole leaching period for the compound fertilizer treatment was always lower than that of the common fertilizer treatment.But their relative difference gradually decreased,from 54.31% at the beginning to 12.24% in the end.The conclusion was that this kind of fertilizer had obvious slow releasing effect.
出处
《河北农业科学》
2007年第5期51-53,共3页
Journal of Hebei Agricultural Sciences
基金
河北省农林科学院青年基金(A06100101)
关键词
复混肥
缓/控释肥料
氮素
缓释性能
Compound fertilizer
Slow-releasing fertilizer
Nitrogen
Slow-releasing function
