Environmental status of livestock and poultry sectors in China under current transformation stage

Qian, Yi; Song, Kigook; Hu, Tao; Ying, Tianyu

doi:10.1016/j.scitotenv.2017.12.045

Cited by 165 publications

(74 citation statements)

References 39 publications

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“…This is because composting subsidy in rural China has flexible ways to subsidize composting production, which can reduce the three main costs for the adoption of Composting, namely high production cost, high transportation cost, and expensive composted fertilizer price [3]. First, composting subsidy can subsidize composting equipment, such as manure beds, perforated tubes, blowers, forklifts, and heap turners, which helps to decrease the production cost of compost fertilizer [52]. It can also subsidize the transportation of composting fertilizer to lower the high transportation cost.…”

Section: Government Support Policiesmentioning

confidence: 99%

Adoption of Multiple Sustainable Manure Treatment Technologies by Pig Farmers in Rural China: A Case Study of Poyang Lake Region

et al. 2019

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The adoption of sustainable manure treatment technologies (SMTTs) in livestock production helps to reduce agricultural contamination. As such, understanding what determines farmers’ adoption of SMTTs is an essential prerequisite for the administrative handling of livestock pollution. Applying a multivariate probit model on a cross-sectional data set of 686 pig farmers in Poyang Lake Region in China, this study discovered that two key factors influencing farmers’ decisions to adopt multiple SMTTs are off-farm labor and environmental awareness. In other words, households with a higher share of off-farm labor are less likely to adopt SMTTs. Farmers with higher environmental awareness are more likely to adopt SMTTs. The results also revealed that because of the inappropriateness of government subsidy and insufficient technical training, the impact of Chinese government subsidy on the adoption of biogas technology is negligible, but the subsidy on composting greatly helps to promote the adoption of composting technology. We also found a substitution effect and complementary effects between different SMTTs. These findings can improve policymakers’ understanding of farmers’ joint adoption decisions. It also helps policymakers to optimize subsidy strategies to encourage farmers’ adoption of SMTTs in rural China.

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Section: Government Support Policiesmentioning

confidence: 99%

Adoption of Multiple Sustainable Manure Treatment Technologies by Pig Farmers in Rural China: A Case Study of Poyang Lake Region

et al. 2019

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“…China, as the major producer and consumer of broiler ducks in the world [1], has embarked on the evolution from the free-range rearing to intensive rearing in order to improve production e ciency [2], which is also a transformation of duck husbandry from water-associated to terrestrial [3]. Compared with the demand of extensive waters in traditional rearing system [1,4], dryland rearing systems have common merit in minimizing the need of waterbodies to alleviate environmental issues, such as rivers and lakes, which could also prevent ducks from the incidence of intestinal diseases caused by pathogens in waters [5].…”

Section: Introductionmentioning

confidence: 99%

Changes in production performance, antioxidant capacity and immune status of meat ducks under different rearing systems

Guo¹,

Wang²,

Z³

et al. 2020

Preprint

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Background As potential substitutes of traditional free-range rearing, floor rearing system (FRS) and net rearing system (NRS) are currently predominant dryland rearing systems. In this study, a total of 720 Nonghua ducks were assigned to a 2 × 3 factorial arrangement with two rearing systems (FRS and NRS) and three ages (4w, 8w, and 13w) to study the effects of FRS and NRS on production performance, antioxidant capacity and immune status. Results The production performance was mainly affected at 8w. Body weight, average daily gain, eviscerated weight and semi-eviscerated weight were higher in NRS at 8w, but carcass yield was decreased at 8w and 13w (P < 0.05). Lipid deposition was enhanced in NRS with higher sebum and abdominal fat yield at 8w and 13w (P < 0.05). NRS resulted in the liver developmental retardation at 4w and decreased gizzard index at all ages (P < 0.05). Antioxidant capacity was not affected by rearing systems (P > 0.05), but a tendency of better antioxidant capacity in NRS at 4w was found, while glutathione peroxidase (GSH-Px) activity was higher in NRS at 13w (P < 0.05). Spleen and thymus were promoted in NRS and immune cytokines were extensively affected by rearing system (P < 0.05), exhibiting general higher profiles of IFN-γ, IL-1β, IL-4, immunoglobulins in NRS. Serum biochemical parameters (AST, ALT, and ALP) indicated NRS was better for liver health, and in liver, ALP was higher in FRS at 13w, while ALP and IFN-γ in 13w-FRS were both higher than 4w-FRS and 8w-FRS (P < 0.05). Conclusions Compared with FRS, NRS was conducive to production performance and duck liver health to some extent but it had defects in visceral organ development and lipid deposition. Though antioxidant capacity was not significantly affected, NRS ducks might have better antioxidant capacity at the early stage of breeding, while GSH-Px activity was increased for scavenging excess free radicals at the later one. NRS increased the levels of IFN-γ, IL-1β, IL-4, immunoglobulins in serum and promoted the development of thymus and spleen to improve duck immune function. These results revealed the physiological impacts of FRS and NRS on ducks and provided a reliable reference for rearing system selection.

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“…This large supply for pork stimulates the growth of the pig-raising sector. Especially in 2 of 17 China, to gain the most benefits from pig-raising, the conventional household pig-raising systems, which are thousands of years old, have changed to large-scale and intensive pig production [2,3]. In order to pursue fast-growing and high final weight, Chinese farmers tended to raise crossbred pigs instead of the local pig breed and to supply more concentrated and fine feed.…”

Section: Introductionmentioning

confidence: 99%

Emergy-Based Sustainability Analysis of an Ecologically Integrated Model with Maize Planting for Silage and Pig-Raising in the North China Plain

Liu

Hou

et al. 2019

Sustainability

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The structure of the pig-raising sector in China is changing towards large-scale and intensive systems or ecological pig-raising systems (EPRSs). To choose the best EPRS with high economic benefits and with low environmental consequences, this study combined economic analysis and emergy analysis methods to evaluate several EPRSs. Having a large percentage of maize silage in the feed (max 40%) to replace some maize increased the economic benefit and sustainability of the EPRS and decreased the pressure on the environment. The raising system that consisted of Tuhe black pigs fed feed containing maize silage (EPRS C) performed especially well. The yield-based economic profit and area-based economic profit of EPRS C increased by 37%–54% and 3%–17%, respectively, compared to those of the three-breed crossbred pig-raising systems with or without maize silage added to the feed (EPRS A and EPRS B). Its unit emergy value and emergy loading ratio were 9–22% and 10–15% lower, respectively, than those of EPRS A and EPRS B. Furthermore, its emergy yield ratio and emergy sustainability index were about 2% and 14%–19% higher, respectively, than those of EPRS A and EPRS B. To some extent, the results from EPRS C give some guidelines on improving the performance of the ecological pig-raising sector in China. Moreover, using a high concentration of maize silage in the feed and an optimal local pig type may be beneficial for the sustainability of the ecological pig-raising sector in China.

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Environmental status of livestock and poultry sectors in China under current transformation stage

Cited by 165 publications

References 39 publications

Adoption of Multiple Sustainable Manure Treatment Technologies by Pig Farmers in Rural China: A Case Study of Poyang Lake Region

Adoption of Multiple Sustainable Manure Treatment Technologies by Pig Farmers in Rural China: A Case Study of Poyang Lake Region

Changes in production performance, antioxidant capacity and immune status of meat ducks under different rearing systems

Emergy-Based Sustainability Analysis of an Ecologically Integrated Model with Maize Planting for Silage and Pig-Raising in the North China Plain

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