土壤中控释肥氮素释放的测定及其应用  

Nitrogen Release Determination of Controlled Release Fertilizer( CRF) in Soil and Its Application

作　　者：张昌爱[1,2] 张玉凤[1,2] 林海涛[1,2] 曲玲[1,2] 李官东 辛淑荣[1] 

机构地区：[1]山东省农业科学院农业资源与环境研究所,山东济南250100 [2]山东省植物营养与肥料重点实验室,山东济南250100 [3]山东邦地生物科技有限责任公司,山东济南250100

出　　处：《山东农业科学》2015年第9期85-89,93,共6页Shandong Agricultural Sciences

基　　金：国家科技支撑计划项目(2011BAD11B02)

摘　　要：试验采用肥包埋置法测定了硫包膜尿素(SCU)、树脂包膜硫衣尿素(PSCU)及树脂包膜尿素(PCU)在玉米和小麦种植期内土壤中的氮素释放规律,并利用测得的数据,结合他人在作物需肥方面的研究,分析了控释氮肥的释放与作物需肥间的拟合度。结果表明:PSCU、PCU与SCU三种肥料在土壤中与在静水中的氮素累计释放曲线相比,氮素释放明显滞后且呈现前慢后快的释放现象;而在小麦种植期土壤中的氮素累计释放曲线更接近于直线,即各阶段释放率较为平均。在生产应用中依此分析肥料氮素释放与作物需肥的拟合程度,结果表明三种肥料中,PSCU的氮素释放与玉米需肥的拟合效果最好,PCU的氮素释放与小麦需肥拟合效果最好,建议玉米、小麦生产中优选的控释肥品种分别为PSCU和PCU,并且注意在基施控释肥的基础上适当追施氮肥。The nitrogen release of sulfur coated urea （SCU）,polymer sulfur coated urea （PSCU）and polymer coated urea （PCU）in soil during corn and wheat planting periods were determined by fertilizer packet burying method （FPBM）.Combining the findings with other author’s research on crop’s fertilizer demand, the nitrogen release of controlled release nitrogen fertilizers and the fitting degree between crop’s nitrogen de-mand and fertilizer’s nitrogen release were analyzed.The results showed that the nitrogen release of PSCU, PCU and SCU in soil remarkably lagged than that in still water,and the release was slow at early stage but quick at later stage.The curve of nitrogen cumulative release in soil was close to a straight line during wheat planting period,i.e.,the release rate was relatively even in all stages.The fitting degree between corn’s ni-trogen demand and fertilizer’s nitrogen release of PSCU was the best;the fitting degree between wheat’s Nitro-gen demand and fertilizer’s Nitrogen release of PCU was the best.Thus,PSCU and PCU were suggested to be the optimized fertilizer for corn and wheat planting respectively,and on this base,topdressing nitrogen fertiliz-er should be the point for attention.

关 键 词：控释肥 氮素释放 土壤 肥包埋置法 拟合度 

分 类 号：B158.3[哲学宗教—世界哲学]