CAJ | 학술논문

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。
시험채용비포매치법측정료류포막뇨소（SCU）、수지포막류의뇨소（PSCU）급수지포막뇨소（PCU）재옥미화소맥충식기내토양중적담소석방규률，병이용측득적수거，결합타인재작물수비방면적연구，분석료공석담비적석방여작물수비간적의합도。결과표명：PSCU、PCU 여 SCU 삼충비료재토양중여재정수중적담소루계석방곡선상비，담소석방명현체후차정현전만후쾌적석방현상；이재소맥충식기토양중적담소루계석방곡선경접근우직선，즉각계단석방솔교위평균。재생산응용중의차분석비료담소석방여작물수비적의합정도，결과표명삼충비료중，PSCU 적담소석방여옥미수비적의합효과최호，PCU 적담소석방여소맥수비의합효과최호，건의옥미、소맥생산중우선적공석비품충분별위 PSCU 화 PCU，병차주의재기시공석비적기출상괄당추시담비。
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.