Phytotoxicity of uncomposted and composted poultry manure

Authors

  • M. Mar Delgado1*, José V. Martin1, Rosario Miralles De Imperial1, Cristina León- Cófreces2 and M. Cruz. García2 1 Environmental Department, INIA, Ctra. La Coruña Km 7.5, 28040 Madrid, Spain. 2 Agricultural Technological Institute of Castilla y Leon, Finca Zamadueñas, 47071 Valladolid, Castilla y Leon, Spain. Author

Keywords:

Uncomposted poultry manure, composted poultry manure, phytotoxicity, germination index, ammonia concentration, electrical conductivity.

Abstract

Different uncomposted and composted poultry manure types (laying hen and broiler), mixed at
increasing rates (0, 25, 50, 75 and 100%) with two amended peat substrates, were tested to study the
phytotoxicity using the cress (Lepidium sativum, L.) germination method. The results showed that
composting generally reduced the phytotoxicity of the manure mixtures. The germination index was
highest in both amended peat substrates. When the peat substrates were mixed with uncomposted
poultry manure, only the rate of 25% of uncomposted poultry manure from laying hens showed reduced
toxicity. These was not phytotoxicity when the poultry manure was composted in rates of 25, 50 and
75% of deep-pit manure from laying hens and in rates of 25 - 50% of the poultry manures from stock
piled, deep litter and broiler litter in mixtures with both peat substrates.

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Published

2016-02-26

Issue

Vol. 4 No. 1 (2016): 2016

Section

Articles

How to Cite

Phytotoxicity of uncomposted and composted poultry manure. (2016). International Journal of Manures and Fertilizers, 4(1), 1-9. https://ijpp.org/journal/index.php/ijmf/article/view/108