论文部分内容阅读
把有15N标记的尿素用自选的3种材料(W SU,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;W SU、FSU之间的差异都达显著水平,W SU与CK 2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。
The 15N-labeled urea was coated with slow release fertilizer coated with three optional materials (W SU, FSU and GZCU). The results showed that: (1) GZCU could better control the release of N-nutrient and make the content of available N in the soil of GZCU maintain a high state during the whole growing period of maize, and still provide sufficient nutrients in the later stage of maize growth, N absorption of corn on the accumulation of corn. (2) The yield of GZCU and FSU increased significantly by 5.5% ~ 21.3% compared with urea, and the difference between them was also significant. (3) Under the condition of basal application of fertilizer, the N utilization efficiency of coated fertilizer was 4.5 ~ 19.3 percentage points higher than that of urea. The differences among GZCU, FSU, W SU and FSU reached significant level, W SU and CK 2 difference is not obvious. GZCU N prime season utilization up to 53.8%, which can effectively reduce the loss of N.