Redeploy manure resources to enhance the agro-pastoral cycle

Zhi, Boyao; Xiang, Shumin; Li, Han; Dai, Zhixiong; Du, Pufang; Wang, Rui; Li, Xuetao; Yang, Gaihe; Feng, Yongzhong; Ren, Guangxin; Wang, Xiaojiao

doi:10.1016/j.scitotenv.2022.157439

Cited by 8 publications

(3 citation statements)

References 37 publications

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“…Занадто висока концентрація нітратів у воді становить загрозу для здоровʼя людини. Про необхідність перевезення гною з одних критичних регіонів Китаю в інші, з урахуванням моделі просторового розподілу поживних речовин у гною та потреби у них сільськогосподарських угідь для підтримання екологічного благополуччя територій, зазначається в публікації Zhi et al [12].…”

Section: державний біотехнологічний університет харків українаunclassified

Ensuring the ecological safety of agroecosystems in conditions of increased content of heavy metals in fodder and manure of cows

Portiannik

2023

Tehnologìâ virobnictva ì pererobki produktìv tvarinnictva

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Environmental pollution with organic waste from livestock, especially cattle manure, is relevant for various countries of the world, including the United States of America and the countries of the European Union. Manure, which contains toxic heavy metals such as cadmium, lead, copper and zinc, is a much greater threat to agroecosystems and, in particular, to the soil. In the forest-steppe zone of Ukraine, a scientific and economic experiment was conducted on dairy cows for the production of ecologically safe milk. During the experiment, the research groups were fed a special mineral-vitamin premix and an injection of a biological preparation that enhanced the elimination of heavy metals with excrement. Experiments were conducted in four farms with different livestock. At the end of the experiment, 10 samples of manure mass were taken from each farm (total of 40 samples) and a chemical analysis of the concentration of heavy metals Cd, Pb, Cu and Zn was made using atomic absorption spectrophotometry (spectrophotometer AAS-30). It was established that as a result of the content in animal diets of fodder with exceeding the maximum allowable concentrations of heavy metals, they, passing through the gastrointestinal tract, fall together with excrement into manure. The average concentration of cadmium was 0.07-0.11 mg/ kg, lead 5.48-8.25 mg/kg, copper 37.71-47.42 mg/ kg, zinc 66.55-81.49 mg / kg. Litter manure is subsequently applied to agricultural land as an organic fertilizer. In order to prevent soil contamination with heavy metals, it is necessary to establish the expediency of applying organic fertilizers to vegetable and fodder crops in each specific case, especially those that are fed to dairy cows. In connection with the difficulty, in today's conditions, for farmers to purchase a sufficient amount of mineral fertilizers, to increase the use of organic fertilizers, if their quantity is sufficient in the farm, but their application to the soil should be controlled and standardized, taking into account the concentration of toxicants in the manure mass and the soil of agricultural lands with simultaneous improvement of grinding and uniformity of distribution over the field. The use of modern equipment for crushing and spreading manure, as well as scientifically based methods of its composting, growing vermiculture, synanthropic fly larvae or biogas production will contribute to the introduction of manure into the soil as an ecologically safe organic fertilizer, will positively affect its mechanical and physical chemical properties, will ensure a good economically effective yield of crops, ecological safety of agroecosystems, cows with ecologically safe feed.Keywords: average daily hopes, premix, bioprepared, cadmium, lead, copper, zinc, contaminated feeds, antidote substances. Key words: manure, heavy metals, organic waste, ecological safety, agro-ecosystem, dairy cows.

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Section: державний біотехнологічний університет харків українаunclassified

Ensuring the ecological safety of agroecosystems in conditions of increased content of heavy metals in fodder and manure of cows

Portiannik

2023

Tehnologìâ virobnictva ì pererobki produktìv tvarinnictva

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“…The farmland application of livestock manure can amend the soil fertility and ensure sustainable soil productivity, which has a long agricultural history, and is being vigorously promoted due to the rising cost of fertilizer as well as the necessity of unwanted wastes disposal (Zhen et al, 2014). Currently, returning manure to the field is an effective way of livestock manure resource utilization, which could realize the circulation of agricultural planting and breeding resources (Xie et al, 2018;Zhi et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Exploring antibiotic resistance load in paddy-upland rotation fields amended with commercial organic and chemical/slow release fertilizer

et al. 2023

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Agricultural fertilization caused the dissemination of antibiotic resistance genes (ARGs) in agro-ecological environment, which poses a global threat to crop-food safety and human health. However, few studies are known about the influence of different agricultural fertilization modes on antibiotic resistome in the paddy-upland rotation soils. Therefore, we conducted a field experiment to compare the effect of different fertilization (chemical fertilizer, slow release fertilizer and commercial organic fertilizer replacement at various rates) on soil antibiotic resistome in paddy-upland rotation fields. Results revealed that a total of 100 ARG subtypes and 9 mobile genetic elements (MGEs) occurred in paddy-upland rotation soil, among which MDR-ARGs, MLSB-ARGs and tet-ARGs were the dominant resistance determinants. Long-term agricultural fertilization remarkably facilitated the vertical accumulation of ARGs, in particular that blaampC and tetO in relative abundance showed significant enrichment with increasing depth. It’s worth noting that slow release fertilizer significantly increased soil ARGs, when comparable to manure with 20% replacing amount, but chemical fertilizer had only slight impact on soil ARGs. Fertilization modes affected soil microbial communities, mainly concentrated in the surface layer, while the proportion of Proteobacteria with the highest abundance decreased gradually with increasing depth. Furthermore, microbial community and MGEs were further proved to be essential factors in regulating the variability of ARGs of different fertilization modes by structural equation model, and had strong direct influence (λ = 0.61, p < 0.05; λ = 0. 55, p < 0.01). The results provided scientific guidance for reducing the spreading risk of ARGs and control ARG dissemination in agricultural fertilization.

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“…Over recent years, the production of cow manure (CM) has increased with the developments of the large-scale and intensive cattle breeding industry in China [ 8 ]. CM is a valuable resource for the sustainable development of agriculture [ 9 ], and is mainly used as fertilizer, energy, and so on [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Rapid and Effective Lead Elimination Using Cow Manure Derived Biochar: Balance between Inherent Phosphorus Release and Pollutants Immobilization

Wang

Wen

Ding

et al. 2022

Toxics

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Cow manure derived biochar (CMBC) can serve as a promising functional material, and CMBC can be regarded as an ecofriendly approach compared to conventional ones. CM bioadsorbent can be employed for heavy metal immobilization (such as for lead) as well as an amendment to increase soil fertility (e.g., phosphorus). Few studies have examined the surface interactions between pollutants and bioadsorbents when inherent nutrient release is present. In this work, CMBC was prepared and applied for Pb(II) removal, and the vital roles of released phosphorus from CMBC were comprehensively disclosed. Furthermore, CMBC could immobilize part of the Pb(II) in soil and promote plant growth. CM400 was an effective adsorbent whose calculated Qe reached 691.34 mg·g−1, and it rapidly adsorbed 98.36 mg·g−1 of Pb(II) within 1 min. The adsorption mechanisms of Pb(II) by CMBC include ion exchange, physical adsorption, electrostatic attraction, chemical precipitation, surface complexation, and cation–π bond interaction. Based on the residual phosphorus content and adsorption effect, complexation rather than the chemical precipitation had a greater contribution toward adsorption. Besides, as the concentration of Pb(II) increased, the main adsorption mechanisms likely transformed from chemical precipitation to ion exchange and complexation. CMBC not only had a good effect on Pb(II) removal in the solution, but also immobilized the Pb(II) in soil to restrain plant uptake as well as promote plant growth. The main novelty of this work is providing more insights to the cow manure bio adsorbent on Pb immobilization and phosphorus release. This study is expected to serve as a basis and reference for analyzing the release effects of inherent nutrients and the interfacial behaviors with heavy metals when using CMBC and other nutrient–rich carbon–based fertilizers for pollution control.

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Redeploy manure resources to enhance the agro-pastoral cycle

Cited by 8 publications

References 37 publications

Ensuring the ecological safety of agroecosystems in conditions of increased content of heavy metals in fodder and manure of cows

Ensuring the ecological safety of agroecosystems in conditions of increased content of heavy metals in fodder and manure of cows

Exploring antibiotic resistance load in paddy-upland rotation fields amended with commercial organic and chemical/slow release fertilizer

Rapid and Effective Lead Elimination Using Cow Manure Derived Biochar: Balance between Inherent Phosphorus Release and Pollutants Immobilization

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