Fertilizer produced from abattoir waste can contribute to phosphorus sustainability, and biofortify crops with minerals

Darch, Tegan; Dunn, Robert M.; Guy, Adrian; Hawkins, J. M. B.; Ash, Michael; Frimpong, Kwame; Blackwell, Martin

doi:10.1371/journal.pone.0221647

Cited by 25 publications

(22 citation statements)

References 25 publications

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“…Rumen contents were mostly piled into pits and sold as manure for peri-urban agriculture by 59% of the respondents. This is in line with the findings by Darch et al (2019) that fertilizers produced from abattoir wastes contribute to the plants mineral requirements for proper growth. Only 16% of the respondents sold dried rumen contents for livestock feeds.…”

Section: Fig 2 Do You Separate Discarded Carcasses From Rumen Contesupporting

confidence: 92%

Abattoir waste use in livestock diets: Uganda’s current situation

Mwesigwa

Migwi

King'ori

et al. 2020

Int. J. Agril. Res. Innov. & Tech.

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In this study, we investigated the various ways slaughter wastes are utilized, problems encountered in order to give insights in future prospects of abattoir wastes as livestock feeds. A total of 100 abattoir workers were interviewed through semi-structured questionnaires covering Kampala, Wakiso and Mukono districts in Uganda. Results revealed that majority of abattoir work force were middle-aged adults between 30-45 years contributing 37% of total workers. There was a significant association between abattoir workers responses in relation to the proportion of livestock slaughtered (Chi square 147.55; df =2; p<0.0001) in the abattoirs. With reference to cattle, 1.06 and 1.01 more sheep and goats were slaughtered respectively in the dry season in comparison to the wet season. Blood was mostly disposed as animal feed ingredient (blood meal) by 40% of the respondents while rumen contents were mostly sold as manure by 59% of the respondents. Only 16% of the respondents processed rumen contents for livestock feeding. 92.3% of bones were sold for dog feeding while 7.7% of bones were processed for livestock feed ingredients. Polythene bags were reported the biggest contaminants found in slaughter wastes. Stench from slaughter wastes contents was the biggest problem encountered with handling of waste products by (62%) of the respondents. The handling of abattoir wastes was still rudimental at most abattoirs as envisaged by lack of proper handling facilities at the abattoirs. There is need for regular enforcements to ensure proper abattoir waste disposal mechanisms for enhanced livestock use. Int. J. Agril. Res. Innov. Tech. 10(1): 129-134, June 2020

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Section: Fig 2 Do You Separate Discarded Carcasses From Rumen Contesupporting

confidence: 92%

Abattoir waste use in livestock diets: Uganda’s current situation

Mwesigwa

Migwi

King'ori

et al. 2020

Int. J. Agril. Res. Innov. & Tech.

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“…This may be intra-annual, as species differ in their heading date, or inter-annual, as some species are less persistent than others [49]. Grassland management, such as the application of lime or fertilizers, is also known to affect mineral concentrations of swards [23], and there is a lack of knowledge on mineral concentrations required in different soil types, and antagonistic effects between minerals [50]. It is also necessary to further investigate the effect of grazing management, which can affect the ratio of leaves and stems in the sward, the former being known to contain higher concentrations of minerals [51], and thus affect the mineral content of the sward.…”

Section: Wider Considerationsmentioning

confidence: 99%

The Mineral Composition of Wild-Type and Cultivated Varieties of Pasture Species

et al. 2020

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Mineral deficiencies in livestock are often prevented by using prophylactic supplementation, which is imprecise and inefficient. Instead, the trend for increased species diversity in swards is an opportunity to improve mineral concentrations in the basal diet. Currently, there are limited data on the mineral concentrations of different species and botanical groups, particularly for I and Se, which are among the most deficient minerals in livestock diets. We grew 21 pasture species, including some cultivar/wild type comparisons, of grasses, legumes and forbs, as single species stands in a pot study in a standard growth medium. Herbage concentrations of Co, Cu, I, Mn, Se, Zn, S, Mo and Fe showed no consistent differences between the wild and cultivated types. There were significant differences between botanical groups for many minerals tested. Forbs were highest in I and Se, grasses in Mn and legumes in Cu, Co, Zn and Fe. Comparing species concentrations to recommended livestock intakes, the forbs Achillea millefolium, Cichorium intybus and Plantago lanceolata, and the legumes Medicago lupulina, Trifolium hybridum and Lotus corniculatus, appear to be good sources of Co, Cu, I, Se and Zn. Further work is required to ensure these results are consistent in multispecies mixtures, in different soil types and in field trials.

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“…i [51] ireported similar results in a greenhouse experiment on AWW on maize. In a previous study, concentrations of nutrients, including N, P, K, Ca, Mg and Na were found higher in Lolium perenne and Triticum aestivum grown in soil treated with fertilizer produced from abattoir wastes [17]. Also, Matheyarasu and Bolan [47] reported the application of AWW to cause an abundance of nutrient accumulation in Pennisetum purpureum, Medicago sativa, Sinapis alba and Helianthus annuus.…”

Section: Discussionmentioning

confidence: 85%

“…Furthermore, yield improvement in plants grown in wastewater treated soil conforms to that of Matheyarasu and Bolan [47] who found about 70% lower yields in Pennisetum purpureum, Medicago sativa, Sinapis alba and Helianthus annuus grown under tap water compared to the abattoir wastewater irrigation. Similarly, in a pot experiment, fertilizer produced from abattoir waste products was found to significantly increase biomass yield of AberMagic grass (Lolium perenne) and wheat (Triticum aestivum) compared with the Nil treatment pots [17]. They reported more grain production in wheat and AberMagic grass when AWW was applied and concluded that it is a sustainable alternative to conventional fertilizers.…”

Section: Discussionmentioning

confidence: 95%

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Assessment of Growth, Yield and Fruit Nutritional Composition of Tomato and Sweet Pepper Irrigated with Abattoir Wastewater

2020

Sci. Lett.

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Recycling of organic-based wastewater for crop production has received worldwide acceptability as a promising alternative to fertilizer use. Hence, this research evaluated growth, yield and nutritional quality of tomato and sweet pepper irrigated with abattoir wastewater (AWW) with the aim of assessing recycling liquid effluent from slaughterhouses for crop production. Each vegetable was cultivated in experimental pots irrigated with 0 (control), 20, 40, 60, 80 and 100% AWW. In tomato, AWW improved plant height, number of branches and leaves, and relative growth rate (RGR) with the maximum values recorded at 100% AWW. Root and shoot dry mass, total biomass and root/shoot ratio were also increased in plants treated with undiluted AWW. In sweet pepper, values of plant height, number of leaves and branches, root length and RGR were higher under AWW treatments than the control with peak values recorded at 100% concentration. The root mass of sweet pepper was increased but the root/shoot ratio was reduced at all AWW concentrations with the highest impact found when AWW was not diluted. While AWW resulted in an increased number of fruits in both crops with the best performance when undiluted, the differences with control were only significant in tomato. Fresh and dry mass of fruit was also significantly increased by AWW in both crops with the highest values recorded at 100% concentration. AWW increased fruit nutrient and heavy metal contents of both vegetables but this increase was nonsignificant compared to control. In conclusion, the application of 20-80% AWW is capable of increasing tomato and sweet pepper production but growing them with undiluted AWW irrigation was the most effective alternative source of fertilizers for improved growth, yield and nutritional quality of vegetables.

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Fertilizer produced from abattoir waste can contribute to phosphorus sustainability, and biofortify crops with minerals

Cited by 25 publications

References 25 publications

Abattoir waste use in livestock diets: Uganda’s current situation

Abattoir waste use in livestock diets: Uganda’s current situation

The Mineral Composition of Wild-Type and Cultivated Varieties of Pasture Species

Assessment of Growth, Yield and Fruit Nutritional Composition of Tomato and Sweet Pepper Irrigated with Abattoir Wastewater

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