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针对堆肥过程中氮素损失严重,产品品质低下的问题,试验以FeCl3和Ca3(PO4)2(干质量比1∶1)混合物分别按10%(处理A)和15%(处理B)的比例添加到堆肥原料中,以未加任何外源物质的处理作为对照,进行添加外源铁、磷是否会促进堆肥腐熟、提高产品品质的研究。结果表明,与对照处理相比,外源铁、磷对堆肥油菜籽(Brassica napus)发芽率指数影响不大,但产品的氮素含量明显提高,分别高于对照1.42%和1.17%;外源铁、磷加速有机质的分解,有机质分解率分别高于对照处理13%和3.3%;外源铁、磷对堆肥产品腐殖酸结合的Fe含量分别为对照处理的4.4倍和1.98倍,铁结合的磷含量分别为9.12、5.91g·kg-1,对照处理仅为2.21g·kg-1,并通过相关文献讨论,提出堆肥体中可能形成了“腐殖酸-Fe-P”三元复合体的假设。从作用和成本上来看,处理A的添加比例较处理B合适。
Aiming at the problem of serious nitrogen loss and poor product quality in composting process, the mixture of 10% (treatment A) and 15% (treatment B) of the mixture of FeCl3 and Ca3 (PO4) 2 (dry weight ratio 1: 1) Add to the compost raw materials, without any foreign material as a control, add exogenous iron, phosphorus will promote compost composting, improve product quality research. The results showed that compared with the control, exogenous iron and phosphorus had little effect on the germination rate index of compost (Brassica napus), but the nitrogen content of the product increased significantly, which were 1.42% and 1.17% higher than the control respectively. Iron and phosphorus accelerate the decomposition of organic matter and organic matter decomposition rate were higher than the control treatment of 13% and 3.3%; exogenous iron and phosphorus composting products humic acid Fe content were 4.4 times and 1.98 times the control treatment, iron binding P and P were 3.12 and 5.91 g · kg-1, respectively, while the control treatment was only 2.21 g · kg-1. According to the literature review, it was suggested that “humic acid-Fe-P” Meta-complex assumptions. From the role and cost point of view, the processing of A than the proportion of processing B is appropriate.