包膜缓释肥料(CSFs)增产机理与氮肥利用率示踪研究  

Research on Increase Yield Mechanisms of Coated Slow-Release Fertilizers and N utilization Ratio by Tracing

作　　者：王艳[1] 王小波[2] 王小晶[2] 张渊[2] 苏霄倩[2] 

机构地区：[1]天津农学院,天津300384 [2]山西农业大学资源与环境学院,山西太谷030801

出　　处：《水土保持学报》2006年第5期109-111,共3页Journal of Soil and Water Conservation

基　　金：天津科技攻关培育项目(合同编号:06YFGPNC03100);山西科技攻关项目(033005)共同资助

摘　　要：把有^15N标记的尿素用自选的3种材料（WSU，FSU，GZCU）包膜制得包膜缓释肥后，进行了玉米微区试验。结果表明：（1）GZCU能较好的控制N素养分的释放，使GZCU处理土壤中速效N含量在玉米整个生育期保持较高状态，在玉米生长的后期仍能提供充足的养分，促进了玉米对N素的吸收、累积。（2）包膜肥处理与尿素相比，产量增加5．5％～21．3％，GZCU，FSU的增幅达显著水平，它们之间的差异也显著。（3）在各肥料一次基施的条件下，包膜肥的N素利用率比尿素高出4．5～19．3个百分点，GZCU、FSU之间；WSU、FSU之间的差异都达显著水平，WSU与CK2差异不明显。GZCU的N素当季利用率高达53．8％，可有效减少N的损失。Coated slow-release fertilizers were made by coated urea with ^15N using three kind of materials （WSU,FSU, GZCU） in maize. The results showed that GZCU greatly controlled the release of N in soil, the content of available - N in GZCU soil was higher in corn entire reproductive period. Sufficient nutrient could be provided in later stager of corn and could meet the need for N absorption and accumulation. Compared with urea, the output of CSFs increased by 5.5 % - 21.3 %. The difference of economic yield between GZCU, FSU treatment and CK treatment is significant. In condition of all fertilizers were basal applied, N use ratio of CSFs is 4.5 -19.3 percentage points higher than only supplied by urea. The difference of N utilization ratio between GZCU treatment and FSU treatment is significant. The same to WSU and FSU, but the difference between WSU and CK2 is not significant.

关 键 词：包膜缓释肥 ^15N标记尿素 氮肥利用率 玉米 

分 类 号：S145.6[农业科学—肥料学]