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ASSESSMENT OF HEAVY METALS IN HYDROCHAR PRODUCED BY HYDROTHERMAL CARBONIZATION OF DAIRY MANURE
《农业科学与工程前沿(英文)》 2023年 第10卷 第3期 页码 437-447 doi: 10.15302/J-FASE-2023507
● Content of heavy metals in hydrochar varies considerably, from 50% to 100%.
关键词: heavy metals dairy manure hydrochar hydrothermal carbonization waste management
Enzhu HU, Pakorn SUTITARNNONTR, Markus TULLER, Scott B. JONES
《农业科学与工程前沿(英文)》 2018年 第5卷 第2期 页码 280-286 doi: 10.15302/J-FASE-2018215
关键词: carbon dioxide dairy manure methane moisture temperature
INTENSIFICATION OF GRASSLAND-BASED DAIRY PRODUCTION AND ITS IMPACTS ON LAND, NITROGEN AND PHOSPHORUS
Jouke OENEMA, Oene OENEMA
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期 页码 130-147 doi: 10.15302/J-FASE-2020376
关键词: ammonia externalization feed forage maize front runners manure production milk yield nitrogen surplus
Alan FRANZLUEBBERS, Derek HUNT, Gary TELFORD, Shabtai BITTMAN, Quirine KETTERINGS
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期 页码 81-96 doi: 10.15302/J-FASE-2020365
关键词: cropland dairy manure nutrient cycling pastureland poultry manure swine manure
HARNESSING BIODIVERSITY FOR HEALTHY DAIRY FARMS
《农业科学与工程前沿(英文)》 2022年 第9卷 第2期 页码 238-244 doi: 10.15302/J-FASE-2022445
Producing sufficient high-quality forage to meet the increasing domestic demand for safe and nutritious milk products is one of the critical challenges that Chinese dairy farms are facing. The increased forage biomass production, mainly contributed by agrochemicals inputs in China, is accompanied by tremendous impacts on the ecology of dairy farms and soil quality. This paper presents a framework for healthy dairy farms in which targeted management practices are applied for quality milk products with minimal adverse environmental impacts. The paper also summarizes biodiversity management practices at the field and landscape scales toward lessening inputs of water, fertilizers, pesticides and mitigating soil compaction. Dairy farming with biodiversity-driven technologies and solutions will be more productive in producing quality milk and minimizing environmental damage.
关键词: biodiversity / dairy farm / one health concept / soil health
NEW ZEALAND DAIRY FARM SYSTEMS AND KEY ENVIRONMENTAL EFFECTS
Jiafa LUO, Stewart LEDGARD
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期 页码 148-158 doi: 10.15302/J-FASE-2020372
关键词: dairy farms environmental impacts grazing systems intensification mitigation
NEW ZEALAND DAIRY FARM SYSTEMS AND KEY ENVIRONMENTAL EFFECTS
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期
• NZ dairy farming systems are based on year-round grazing of perennial pasture (ryegrass/white clover).
• Milk production per hectare has increased by about 29% with increased use of externally-sourced feeds over the last two decades.
• Externally-sourced feeds with a low protein concentration can potentially reduce N2O emissions and N leaching per unit of production.
• Systems analysis is important for evaluating mitigations to minimize trade-offs between environmental impacts.
This paper provides an overview of the range of dairy pasture grazing systems used in New Zealand (NZ), the changes with increased inputs over time and associated key environmental effects including nitrogen (N) leaching and greenhouse gas (GHG) emissions. NZ dairy farming systems are based on year-round grazing and seasonal milk production on perennial ryegrass/clover pasture where cows are rotationally grazed in paddocks. There was an increase in stocking rate on NZ dairy farms from 2.62 cows ha−1 in 2000/2001 to 2.84 cows ha−1 in 2015/2016. During the same period annual milk solids production increased from 315 to 378 kg·yr−1 per cow. This performance has coincided with an increase in N fertilizer use (by ~ 30%) and a twofold increase in externally-sourced feeds. Externally-sourced feeds with a low protein concentration (e.g., maize silage) can increase the efficiency of N utilization and potentially reduce N losses per unit of production. Off-paddock facilities (such as standoff or feed pads) are often used to restrict grazing during very wet winter conditions. A systems analysis of contrasting dairy farms in Waikato (largest NZ dairying region) indicates that the increased input would result in an increase in per-cow milk production but little change in efficiency of milk production from a total land use perspective. This analysis also shows that the increased inputs caused an 11% decrease in N footprint (i.e., N emissions per unit of milk production) and a 2% increase in C footprint (i.e., greenhouse gas (GHG) emissions per unit of milk production).jiafa.luo@agresearch.co.nz
Maria CARIA, Giuseppe TODDE, Antonio PAZZONA
《农业科学与工程前沿(英文)》 2019年 第6卷 第2期 页码 181-187 doi: 10.15302/J-FASE-2019252
In recent decades, dairy farms have been exposed to wide variation in profit levels due to a considerable variability of milk price, and energy and feed costs. Consequently, it is necessary for the dairy industry to improve efficiency and productivity by adopting innovative technologies. The automated in-parlour milk analysis and separation is mainly useful to produce low or high quality milk and to monitor the animal health status. Milk with high levels of protein and fat contents may reduce the intensity of standardization during cheesemaking process, reducing production costs. The study aimed to evaluate the efficiency of real-time milk separation during milking and the performance of the milking machine after implementation of AfiMilk MCS. In addition, the economic aspects were assessed. The separation of milk required the existing milking parlors to be equipped with an additional milkline to allow channeling milk with low and high coagulation properties into two different cooling tanks. The results showed that the high coagulation milk fraction, compared to the bulk milk, increased in fat (from 18% to 43%) and protein (from 3% to 7%) concentration. The technology tested has given promising results showing reliability and efficiency in milk separation in real time with affordable implementation costs.
关键词: cheese yield infrared analysis milk quality real-time measurement sensor
INTENSIFICATION OF GRASSLAND-BASED DAIRY PRODUCTION AND ITS IMPACTS ON LAND, NITROGEN AND PHOSPHORUS
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期
• Monitoring data of>5000 dairy farms collected and examined in uniform manner.
• Environmental performances of farms influenced by government regulations.
• N and P surpluses at farm level remained about constant with intensity level.
• N and P use efficiencies at farm, herd and soil increased with intensity level.
• Accounting for externalization of off-farm feed production affects NUE and PUE.
• Ammonia emissions per kg milk decreased with the level of intensification.
Many grassland-based dairy farms are intensifying production, i.e., produce more milk per ha of land in response to the increasing demand for milk (by about 2% per year) in a globalized market. However, intensive dairy farming has been implicated for its resources use, ammonia and greenhouse gas emissions, and eutrophication impacts. This paper addresses the question of how the intensity of dairy production relates to N and P surpluses and use efficiencies on farms subjected to agri-environmental regulations. Detailed monitoring data were analyzed from 2858 grassland-based dairy farms in The Netherlands for the year 2015. The farms produced on average 925 Mg·yr−1 milk. Milk production per ha ranged from<10 to>30 Mg·ha−1·yr−1. Purchased feed and manure export strongly increased with the level of intensification. Surpluses of N and P at farm level remained constant and ammonia emissions per kg milk decreased with the level of intensification. In conclusion, N and P surpluses did not differ much among dairy farms greatly differing in intensity due to legal N and P application limits and obligatory export of manure surpluses to other farms. Further, N and P use efficiencies also did not differ among dairy farms differing in intensity provided the externalization of feed production was accounted for. This paper provides lessons for proper monitoring and control of N and P cycling in dairy farming.
《农业科学与工程前沿(英文)》 doi: 10.15302/J-FASE-2023487
● Research on heavy metal passivation and nitrogen emissions is necessary for the pig industry.
关键词: additives composting heavy metals passivation nitrogen retention pig manure
《环境科学与工程前沿(英文)》 2022年 第16卷 第7期 doi: 10.1007/s11783-021-1499-y
• Manure fertilization resulted in antibiotic residues and increased metal contents.
关键词: Pig manure Antibiotics Metals Antibiotic resistance genes Paddy fields
LIVESTOCK AND POULTRY MANURE MANAGEMENT FROM THE PERSPECTIVE OF CARBON NEUTRALITY IN CHINA
《农业科学与工程前沿(英文)》 2023年 第10卷 第3期 页码 341-362 doi: 10.15302/J-FASE-2023509
● Carbon reduction potential of manure treatment technologies was summarized.
关键词: valorization of animal manure manure management carbon emission carbon footprint methodology carbon trading
《环境科学与工程前沿(英文)》 2021年 第15卷 第5期 doi: 10.1007/s11783-020-1342-x
• SMX addition had negative effect on acetoclastic methanogens in mesophilic AD.
关键词: Pig manure Antibiotics Anaerobic digestion Resistance genes Microbial community
《环境科学与工程前沿(英文)》 2022年 第16卷 第3期 doi: 10.1007/s11783-021-1473-8
• Earthworms increase CO2 and N2O emissions in agricultural and forest soil.
关键词: Carbon sequestration Forest soil Cattle manure biochar Greenhouse gas emissions Soil fauna
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期
• Manure utilization is hindered by separate specialist crop and livestock production systems.
• Improving manure utilization requires organizations for manure exchange.
• Policies and action plans for improving manure utilization are critically reviewed.
• A manure chain approach with third-party contractors is recommended.
Livestock numbers in China have more than tripled between 1980 and 2017. The increase in the number of intensive livestock production systems has created the challenges of decoupled crop and livestock systems, low utilization of manures in croplands, and subsequent environmental pollution. Correspondingly, the government has enacted a series of policies and regulations to increase the sustainability of livestock production. This paper reviews the objectives of these policies and regulations and their impacts on manure management. Since 2017 there have been two policy guides to speed up the appropriate use of manures, three action plans for increasing manure recycling, and one technical guide to calculate nutrient balances. Requirements of manure pollution control and recycling for improved environmental performance of livestock production systems were included in three revised environmental laws. Most recent survey data indicate that the utilization of livestock manures was 70% in 2017, including that used as fertilizer and/or for production of energy. The targets for manure utilization are 75% in 2020 and 90% in 2035. To achieve these targets and promote ‘green livestock production’, additional changes are needed including the use of third-party enterprises that facilitate manure exchange between farms and a more integrated manure nutrient management approach.
标题 作者 时间 类型 操作
Modeling temperature and moisture dependent emissions of carbon dioxide and methane from drying dairycow manure
Enzhu HU, Pakorn SUTITARNNONTR, Markus TULLER, Scott B. JONES
期刊论文
INTENSIFICATION OF GRASSLAND-BASED DAIRY PRODUCTION AND ITS IMPACTS ON LAND, NITROGEN AND PHOSPHORUS
Jouke OENEMA, Oene OENEMA
期刊论文
INTEGRATED CROP-LIVESTOCK SYSTEMS: LESSONS FROM NEW YORK, BRITISH COLUMBIA, AND THE SOUTH-EASTERN UNITED STATES
Alan FRANZLUEBBERS, Derek HUNT, Gary TELFORD, Shabtai BITTMAN, Quirine KETTERINGS
期刊论文
Evaluation of automated in-line precision dairy farming technology implementation in three dairy farms
Maria CARIA, Giuseppe TODDE, Antonio PAZZONA
期刊论文
INTENSIFICATION OF GRASSLAND-BASED DAIRY PRODUCTION AND ITS IMPACTS ON LAND, NITROGEN AND PHOSPHORUS
期刊论文
EFFECT OF EXOGENOUS ADDITIVES ON HEAVY METAL PASSIVATION AND NITROGEN RETENTION IN PIG MANURE COMPOSTING
期刊论文
Antibiotic resistance genes in manure-amended paddy soils across eastern China: Occurrence and influencing
期刊论文
Mesophilic and thermophilic anaerobic digestion of swine manure with sulfamethoxazole and norfloxacin
期刊论文
Cattle manure biochar and earthworm interactively affected CO and NO emissions in agricultural and forest
期刊论文