气化渣粒径与添加比例对复混肥养分浸水释放的影响
Effects of Particle Size of Gasification Residue and Addition Ratio on Nutrient Release of Compound Fertilizer by Immersion

DOI: 10.12677/HJAS.2021.1111134, PP. 996-1004

Keywords: 气化渣，复混肥，浸水试验，养分释放
Gasification Residue, Compound Fertilizer, Immersion Test, Nutrient Release

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Abstract:

为筛选特定的气化渣粒径和气化渣与化肥的比例，制作功能型高效气化渣复混肥，在实验室开展浸水试验，研究大颗粒(1.00~0.50 mm, B)、中颗粒(0.50~0.25 mm, M)、小颗粒(0.25~0.15 mm, S)气化渣粒径与气化渣添加15%、30%、45%比例对复混肥氮磷钾释放的影响。结果表明，浸水48 h时，与大颗粒、中颗粒相比，小颗粒的铵态氮释放率分别降低了2.87%、0.02%，磷素释放率分别降低了16.88%、12.46%，钾素释放率分别降低了0.52%、0.79%。浸水48 h时，15%处理与30%处理，45%处理的铵态氮释放率相比分别降低了4.45%、3.93%，磷素释放率分别降低了51.39%、24.64%，钾素释放率分别降低了9.12%、10.01%。且15%处理的氮磷钾释放率与30%和45%处理分别相比有显著性差异。因此粒径和添加比例对复混肥养分释放都有影响。在相同气化渣添加比例(15%)下，气化渣粒径为0.50~0.25 mm复混肥对肥料中的氮磷钾释放延缓效果比气化渣粒径为1.00~0.50 mm和0.25~0.15 mm的复混肥更好。在相同气化渣粒径(0.50~0.25 mm)下，气化渣添加比例为15%时对养分的释放延缓效果最好，添加比例为45%次之，添加比例为30%最差。
In order to select the specific particle size of gasification slag and the ratio of gasification slag to chemical fertilizer, the functional high efficiency gasification slag compound fertilizer was prepared. The immersion test was carried out in the laboratory to study the large particles (1.00~0.50 mm, B), medium particles (0.50~0.25 mm, M), small particles (0.25~0.15 mm, S) Effect of gasification slag particle size and proportion of 15%, 30% and 45% addition of gasification slag on NPK release of compound fertilizer. The results showed that when immersed for 48 h, the release rate of ammonium nitrogen, phosphorus and potassium of small particles decreased by 2.87% and 0.02%, 16.88% and 12.46%, respectively, compared with that of large and medium particles, respectively. After soaking for 48 h, the release rate of ammonium nitrogen, phosphorus and potassium in 15% treatment decreased by 4.45% and 3.93%, 51.39% and 24.64%, respectively, compared with 30% and 45% treatment, respectively. Moreover, the NPK release rate of 15% treatment was significantly different from that of 30% and 45% treatment, respectively. Therefore, particle size and addition proportion have influence on nutrient release of compound fertilizer. Under the same proportion of gasification slag (15%), the compound fertilizer with gasification slag particle size of 0.50~0.25 mm had better retarded effect on NPK release than that with gasification slag particle size of 1.00~0.50 mm and 0.25~0.15 mm. Under the same gasification slag particle size (0.50~0.25 mm), the addition proportion of 15% gasification slag had the best delaying effect on the release of nutrients, followed by 45%, and the worst was 30%.

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