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Yong Hou

Bio: Yong Hou is an academic researcher from China Agricultural University. The author has contributed to research in topics: Manure management & Livestock. The author has an hindex of 2, co-authored 3 publications receiving 51 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors quantified the impact of environmental policies on livestock production structure, spatial distribution and their related greenhouse gases (GHGs) and ammonia (NH3) emissions.

49 citations

Journal ArticleDOI
TL;DR: In this paper, the authors review strategies to improve management at each stage of the manure management chain and at different scales and propose a manure nutrient recommendation system that accounts for the range of manure types, cropping systems, soils and climates throughout China.
Abstract: As the demand for livestock products continues to increase in China, so too does the challenge of managing increasing quantities of manure. Urgent action is needed to control point source (housing, storage and processing) and diffuse (field application) pollution and improve the utilization of manure nutrients and organic matter. Here, we review strategies to improve management at each stage of the manure management chain and at different scales. Many strategies require infrastructure investment, e.g., for containment of all manure fractions. Engineering solutions are needed to develop advanced composting systems with lower environmental footprints and design more efficient nutrient stripping technologies. At the field-scale, there is an urgent need to develop a manure nutrient recommendation system that accounts for the range of manure types, cropping systems, soils and climates throughout China. At the regional scale, coordinated planning is necessary to promote recoupling of livestock and cropping systems, and reduce nutrient accumulation in regions with little available landbank, while minimizing the risk of pollution swapping from one region to another. A range of stakeholders are needed to support the step change and innovation required to improve manure management, reduce reliance on inorganic fertilizers, and generate new business opportunities.

36 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, a review of the most frequently employed manure management technologies from their state of the art, challenges, sustainability, environmental regulations and incentives, and improvement strategies is presented.
Abstract: An ever increasing demand for animal protein products has posed serious challenges for managing the increasing quantities of livestock manure. The choice of treatment technologies is still a complicated task and considerable debates over this issue still continue. To build a clearer picture of manure treatment framework, this study was conducted to review the most frequently employed manure management technologies from their state of the art, challenges, sustainability, environmental regulations and incentives, and improvement strategies perspectives. The results showed that most treatment technologies have focused on the solid fraction of manure while the liquid fraction still remains a potential environmental threat. Compared to other waste to energy solutions, anaerobic digestion is the most mature technology to upgrade manure's organic matter into renewable energy, however the problems associated with high investment costs, operating parameters, manure collection, and digestate management have hindered its developments in rural areas in developing countries. Bio-oil production through hydrothermal liquification is also a promising solution, as it can directly convert the wet manure into biofuel. However, lipid-poor nature of manure, operational difficulties, and the need for downstream process to remove nitrogenous compounds from the final product necessitate further research. Livestock manure management (both solid and liquid fractions) under biorefinery approach seems an inevitable solution for future sustainable development to meet circular bioeconomy requirements. Much research is still required to establish a systematic framework based on regional requirements to develop an integrated manure nutrient recycling and manure management planning with minimum environmental risks and maximum profit.

140 citations

Journal ArticleDOI
TL;DR: In this paper, a flexible chemiresistive gas sensor based on polyaniline (PANI)/Ti3C2Tx hybrid sensitive films is developed toward agricultural NH3 volatilization monitoring.
Abstract: The monitoring of ammonia (NH3) produced in agricultural fields is of great importance due to its huge threat to ecological environment and human health, yet routine monitoring technologies rely on manual completion and complex agricultural environment brings great challenges to the application feasibility of gas sensors. Herein, a flexible chemiresistive gas sensor based on polyaniline (PANI)/Ti3C2Tx hybrid sensitive films is developed toward agricultural NH3 volatilization monitoring. The hybrid film was deposited on the flexible polyimide substrate by an in-situ self-assembly method. The sensor shows high sensitivity, low detection limit, excellent repeatability, high selectivity and good air stability, which could be attributed to the gas-sensing enhancement effects of PANI/Ti3C2Tx Schottky junction and improved protonation degree of PANI in the hybrids. Especially, the sensor exhibits excellent NH3-sensing properties to 20–80 % relative humidity (RH) environments at a temperature range of 10–40 ℃, making it promising for practical agricultural applications. Furthermore, the application feasibility of the sensor to ammonia volatilization monitoring is verified through agricultural simulation experiments. This work provides a fast and accurate gas sensor methodology toward unattended agricultural application, which is an important supplement to the existing technical methods and may greatly pushes forward the development of modernized intelligent agriculture.

109 citations

Journal ArticleDOI
TL;DR: In this paper, the authors reviewed the recent progress of precision livestock farming (PLF) in the last seven years (2013-2019) on dairy cattle farming, taking into account health, welfare and production aspects, together with animal behaviour, environmental barn conditions and their effect on the three pillars of sustainability.

91 citations

Journal ArticleDOI
TL;DR: The findings indicate that positive shocks to cereal crop production deteriorate the atmospheric quality by intensifying carbon dioxide emissions only in the long run, while the impacts of negative shocks in this regard are statistically insignificant.

65 citations