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首页> 外文期刊>African Journal of Biotechnology >Effects of extraction period on yield of rice straw compost humic acids
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Effects of extraction period on yield of rice straw compost humic acids

机译：提取时间对稻草堆肥腐殖酸产量的影响

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摘要

Humic acids (HA) are widely used in agriculture because of their capability as chelator, organic matter, soil improver and growth promoter. However, their isolation differs in terms of origin or source because of wetting and solubilization factors. This study was conducted to determine extraction period for HA from composted rice straw. Standard procedures were used to extract HA from rice straw compost at different extraction periods of 4, 8, 12, 16, 20 and 24 h. At the end of each extraction period, samples were centrifuged, followed by fractionation and purification. HA yield at different extraction periods was determined and the HA samples were analyzed using standard procedures. The relationship between extraction period and rice straw compost HA yield was quadratic. Extraction period for rice straw compost was 21.6 h and purification (done within 1 h) using distilled water was effective in removing impurities. Moreover, the HA produced at different extraction periods were similar in terms of chemical and spectral characteristics. HA from rice straw compost can be extracted within 24 h and purification can be done in relatively short time without changing their chemical and spectral properties to produce K-humate.
机译：腐殖酸（HA）由于具有螯合剂，有机质，土壤改良剂和生长促进剂的作用而被广泛用于农业。然而，由于润湿和增溶因素，它们的分离在来源或来源方面有所不同。进行这项研究以确定从堆肥稻草中提取HA的时间。使用标准程序在4、8、12、16、20和24小时的不同提取时间从稻草堆肥中提取HA。在每个提取期结束时，将样品离心，然后分馏和纯化。测定不同提取时期的HA产量，并使用标准程序分析HA样品。提取期与稻草堆肥HA产量之间的关系呈二次关系。稻草堆肥的提取时间为21.6小时，使用蒸馏水提纯（1小时内完成）可有效去除杂质。而且，在不同提取时期产生的HA在化学和光谱特性方面相似。稻草堆肥中的HA可以在24小时内提取，并且可以在相对较短的时间内完成纯化，而无需改变其化学和光谱特性以生产K-腐植酸。

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