摘要
以尿素为缓释肥料核心,两种粘土矿物为包膜材料,聚乙烯醇为粘结剂,研制出两种包膜缓释肥料,并探讨了两种包膜肥料在土壤、石英砂等介质条件下的氮素释放特征及形态转化规律,还通过盆栽试验进一步研究了包膜尿素的增产效应。试验结果表明,与普通尿素相比,两种粘土矿物肥料均具有较好的缓释性能,在以石英砂为介质时表现的尤为明显;包膜后的尿素具有较明显的生物增产效应,两种包膜肥料在株高、鲜重、干重等主要产量性状方面与普通尿素均存在显著差异。
The coated- released fertilizers were prepared with two kinds of clay mineral - bentonite and zeolite. The media of soil, sand were used to study the nutrient release characteristics of two types of slow- released fertilizers. Pot experiment was conducted to investigate the effects of clay mineral coated slow release fertilizers on yield and nitrogen recovery in maize. The result showed that the slow- release effect of fertilizer was better than normal fertilizer. The yield increasing effect of coated fertilizer was significant higher than that of height of plant, fresh weight and dry weight of non- coated fertilizer.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2008年第1期28-31,72,共5页
Soil and Fertilizer Sciences in China
基金
扬州大学大学生科技创新基金资助
关键词
缓释肥料
尿素
粘土矿物
slow release fertilizer
urea
clay mineral
