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采用直接淋洗和淹水培养间歇淋洗两种方法评价氨酸法生产颗粒有机无机复混肥的养分缓释特性。结果表明,对氨酸法生产有机无机复混肥造粒,有直接减缓其有机和无机养分释放的效应。在等氮水平下,不同种类有机无机复混肥累积淋失的氮量明显不同,且与淋失的有机碳量没有明显的相关关系,表明有机与无机养分的配比比例影响肥料的氮释放特性。在本研究中,造粒对氨酸法生产的有机和单一无机氮复混肥中氮养分的缓释效果最差,而对氮钾比为2∶1的两种肥料中有机和无机养分的缓释效果均相对较好。
The method of direct leaching and intermittent leaching in flooded culture were used to evaluate the nutrient release characteristics of granular organic and inorganic compound fertilizer produced by amino acid method. The results showed that the granulation of the organic-inorganic compound fertilizer produced by the amino acid method has the effect of directly reducing the release of organic and inorganic nutrients. Under the isophor nitrogen level, the amount of accumulated leaching nitrogen of different types of organic-inorganic compound fertilizers is obviously different, and there is no obvious correlation between the leaching amount of organic carbon and the proportion of organic-inorganic compound fertilizers, indicating that the proportion of organic and inorganic nutrients affects the nitrogen release characteristic. In this study, the slow release of nitrogen from organic and single inorganic nitrogen compound fertilizers produced by granulation was the worst, while for the two kinds of fertilizers with 2: 1 ratio of nitrogen and potassium, organic and inorganic nutrients Slow release effect is relatively good.