Bustamante M A, Ceglie F G, Aly A, Mihreteab H T, Ciaccia C, Tittarelli F
Department of Agrochemistry and Environment, Miguel Hernandez University, EPS-Orihuela, Ctra. Beniel Km 3.2, 03312, Orihuela, Alicante, Spain.
Department of Organic Agriculture, Mediterranean Agronomic Institute of Bari (CIHEAM-IAMB), Valenzano, Bari, Italy.
J Environ Manage. 2016 Nov 1;182:557-563. doi: 10.1016/j.jenvman.2016.08.016. Epub 2016 Aug 17.
Rock phosphate constitutes a natural phosphorus (P) source for organic farming systems, but with a limiting direct agricultural use due to its poor inherent reactivity. Thus, this work studies the effect of the co-composting of rock phosphate with green wastes and elemental sulfur on phosphorus availability. Six composts were prepared combining different green wastes and rock phosphate in three different proportions (0%, 0.27% and 0.54% P fresh mass basis) and elemental sulfur in two proportions (0% and 0.5% S fresh mass basis). During composting, the temperature of the mixtures was monitored, as were physico-chemical and chemical parameters, especially those related to phosphorus. The co-composting of green wastes with rock phosphate improved phosphorus mobilization and also constituted a viable method to manage green wastes, obtaining P-enriched compost for organic farming systems. Sulfur addition favored the composting process and also phosphorus solubilization, especially in the mixture with the lowest proportion of rock phosphate.
磷矿石是有机农业系统的天然磷（P）源，但由于其固有的低反应性，直接农业利用受到限制。因此，本研究探讨了磷矿石与绿色废弃物和元素硫共堆肥对磷有效性的影响。制备了六种堆肥，将不同的绿色废弃物和磷矿石按三种不同比例（基于鲜质量计，磷含量分别为0%、0.27%和0.54%）以及元素硫按两种比例（基于鲜质量计，硫含量分别为0%和0.5%）进行混合。在堆肥过程中，监测了混合物的温度以及物理化学和化学参数，特别是与磷相关的参数。绿色废弃物与磷矿石共堆肥改善了磷的活化，也是一种处理绿色废弃物的可行方法，可为有机农业系统获得富含磷的堆肥。添加硫有利于堆肥过程以及磷的溶解，特别是在磷矿石比例最低的混合物中。
