Major chemical components of poultry and livestock manures under intensive breeding

Soil & Fertilizer Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 11/2006; 17(10):1989-92.
Source: PubMed


Owing to the wide use of feed additives in modern intensive poultry and livestock production, the major components and their concentrations of domestic animal manures may be greatly changed, as compared with those in traditional breeding. An investigation on the 61 samples of chicken, pig and pigeon manures from the intensive poultry and livestock farms of Guangdong Province showed that the concentrations of total N, P and K in chicken and pig manures were obviously higher than those of traditional breeding, and the P/N ratio of three test manures was greater than that of common crops. The concentrations of total soluble salts (TSS) of test manures averaged 49.0, 20.6 and 60.3 g x kg(-1) , respectively, which were mainly composed of the sulfate and chloride of potassium and sodium. The mean concentrations of Cu, Zn and As reached 107.5, 366.6 and 21.6 mg x kg (-1) in chicken manure, 765.1, 1128.0 and 89.3 mg x kg(-1) in pig manure, and 56.1, 210.9 and 2.9 mg x kg(-1) in pigeon manure, respectively. These manures were low in Pb, Cd and Cr contents, from non-detectable to 12.0 mg x kg(-1). According to the limiting criteria of heavy metals in fertilizers, the Cu, Zn and As in the three manures were the major elements exceeding the limits, especially for Zn.

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    • "Increasing demands for products from animal origin have significant consequences on natural recourses like the availability and quality of water, soil, pastures as well as concomitant effects on biodiversity and environmental pollution. Intensive livestock production results in an increased recycling of the minerals N, P and K and heavy metals Cu, Zn and As via faeces back into the environment (Yao and Dang, 2006). These adverse effects of intensive feeding are becoming a worldwide dilemma. "
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    Full-text · Article · May 2010 · Livestock Science
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    • "Peptone is commonly used as nitrogen source for the growth of yeast. Poultry manure as a way of recycling environmental waste has been seen to be efficient as peptone, because of their similar level of yeast growth, and it can also be considered as a better and preferred source of nitrogen because of its abundant availability and the presence of mineral salts like phosphorus, potassium, calcium and magnesium which can as well aid in the growth and development of yeast (Albers et al., 1996; Yao et al., 2006). The optimal growth of yeast as shown by studies is best in the presence of carbon and nitrogen sources; hence, glucose stands as an important carbon source for the growth of yeast with a dual role in biosynthesis, and energy generation and for microbial fermentation processes (Stanbury et al., 1995; Dubai and Muhammad, 2005) which was also confirmed in this experimental design. "
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    Full-text · Article · Apr 2010
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