水土保持学报2011，Vol.25Issue(4)：110-114,120,6.
控释复合肥田间养分释放特征及对土壤硝态氮和铵态氮累积的影响
Nutrient Release Characteristics of Controlled Release Compound Fertilizer in Field and Its Effect on Nitrate and Ammonium Accumulation
摘要
Abstract
In this experiment,the nutrient release characteristics of polymer coated compound fertilizer were studied by water extraction and soil incubation methods.At the same time,the trials were conducted to investigate its effects on nitrate and ammonium accumulation in soil.The results showed that the release rate of controlled release fertilizer fluctuated with the decrease of the extraction temperature.The stated release longevity of CRF1 and CRF2 at 15 ℃ were respectively 1.5 times and 1.67 times than those at 25 ℃.The stated release longevity of CRF1 and CRF2 at 5 ℃ were both 2 times than those at 25 ℃.The release rate of CRF3 in field was slower than that of in water in summer.The margins of release rate were 3.12% on the average from 14th day to 84th days.In spring,the release rate of CRF4 in field was observably slower than that of in water.The maximum margin of release rate was 31.8%.Compared to the common compound fertilizer,the ammonium nitrogen content of topsoil and nitrate nitrogen content in the depth of 0-20 cm significantly increased at growing period with polymer coated fertilizer.The nitrate accumulation at 20-40 cm soil layers was significantly decreased.There was a significantly difference in nitrate nitrogen content at 20-40 cm soil layers between CRF3-H and CCF on the 14th and 84th day.Controlled release fertilizer should be chosen according to the different crop and environment conditions,thus serving the purpose of synergy,economization,safety and environment protection.关键词
控释复合肥/养分释放率/温度/水分/硝态氮/铵态氮Key words
polymer coated controlled release compound fertilizer/release rate of nutrient/temperature/moisture/nitrate nitrogen/ammonium nitrogen分类
农业科技引用本文复制引用
陈剑秋,陈宏坤,张民,孙德芳,陈海宁,王丽萍..控释复合肥田间养分释放特征及对土壤硝态氮和铵态氮累积的影响[J].水土保持学报,2011,25(4):110-114,120,6.基金项目
国家“十二五”科技支撑计划 （）
国家“十一五”科技支撑计划 （）
