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Your search keyword '"Bellarby J"' showing total 4 results
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4 results on '"Bellarby J"'

1. Strategies for sustainable nutrient management:insights from a mixed natural and social science analysis of Chinese crop production systems

Author

Bellarby, J., Siciliano, G., Smith, L.E.D., Xin, L., Zhou, J., Liu, K., Jie, L., Meng, F., Inman, A., Rahn, C., Surridge, B., Haygarth, P.M., Bellarby, J., Siciliano, G., Smith, L.E.D., Xin, L., Zhou, J., Liu, K., Jie, L., Meng, F., Inman, A., Rahn, C., Surridge, B., and Haygarth, P.M.

Abstract

In China intensification of agriculture has been achieved at a cost to the environment. The extension service is the leading public resource to address this but remains focused by a historic national ethos for food security, production and economic growth, whilst its administrative structure is hierarchical, slow to change and lacking in relevant functional integration. Investigation of three case study farming systems identifies how to rebalance productivity with stewardship of farm inputs and natural resources. Substance flow analyses for each case demonstrate that crop nutrient management can potentially be improved to reduce environmental risk without yield loss. Complementary stakeholder surveys and social network analyses identify barriers to change relating to the knowledge, attitudes, practices and operational constraints of farmers and extension agents, and to the structure and performance of agricultural knowledge and innovation systems. This combination of analyses offers an original synthesis of needs, planning priorities and strategies.

Published
2017

2. Strategies for sustainable nutrient management : insights from a mixed natural and social science analysis of Chinese crop production systems

Author

Bellarby, J., Siciliano, G., Smith, L.E.D., Xin, L., Zhou, J., Liu, K., Jie, L., Meng, F., Inman, A., Rahn, C., Surridge, B., Haygarth, P.M., Bellarby, J., Siciliano, G., Smith, L.E.D., Xin, L., Zhou, J., Liu, K., Jie, L., Meng, F., Inman, A., Rahn, C., Surridge, B., and Haygarth, P.M.

Abstract

In China intensification of agriculture has been achieved at a cost to the environment. The extension service is the leading public resource to address this but remains focused by a historic national ethos for food security, production and economic growth, whilst its administrative structure is hierarchical, slow to change and lacking in relevant functional integration. Investigation of three case study farming systems identifies how to rebalance productivity with stewardship of farm inputs and natural resources. Substance flow analyses for each case demonstrate that crop nutrient management can potentially be improved to reduce environmental risk without yield loss. Complementary stakeholder surveys and social network analyses identify barriers to change relating to the knowledge, attitudes, practices and operational constraints of farmers and extension agents, and to the structure and performance of agricultural knowledge and innovation systems. This combination of analyses offers an original synthesis of needs, planning priorities and strategies.

Published
2017

4. The stocks and flows of nitrogen, phosphorus and potassium across a 30-year time series for agriculture in Huantai county, China.

Author

Bellarby J, Surridge BWJ, Haygarth PM, Liu K, Siciliano G, Smith L, Rahn C, and Meng F

Abstract

In order to improve the efficiency of nutrient use whilst also meeting projected changes in the demand for food within China, new nutrient management frameworks comprised of policy, practice and the means of delivering change are required. These frameworks should be underpinned by systemic analyses of the stocks and flows of nutrients within agricultural production. In this paper, a 30-year time series of the stocks and flows of nitrogen (N), phosphorus (P) and potassium (K) are reported for Huantai county, an exemplar area of intensive agricultural production in the North China Plain. Substance flow analyses were constructed for the major crop systems in the county across the period 1983-2014. On average across all production systems between 2010 and 2014, total annual nutrient inputs to agricultural land in Huantai county remained high at 18.1kt N, 2.7kt P and 7.8kt K (696kg N ha -1 ; 104kgP ha -1 ; 300kgK ha -1 ). Whilst the application of inorganic fertiliser dominated these inputs, crop residues, atmospheric deposition and livestock manure represented significant, yet largely unrecognised, sources of nutrients, depending on the individual production system and the period of time. Whilst nutrient use efficiency (NUE) increased for N and P between 1983 and 2014, future improvements in NUE will require better alignment of nutrient inputs and crop demand. This is particularly true for high-value fruit and vegetable production, in which appropriate recognition of nutrient supply from sources such as manure and from soil reserves will be required to enhance NUE. Aligned with the structural organisation of the public agricultural extension service at county-scale in China, our analyses highlight key areas for the development of future agricultural policy and farm advice in order to rebalance the management of natural resources from a focus on production and growth towards the aims of efficiency and sustainability., (Copyright © 2017 Elsevier B.V. All rights reserved.)

Published
2018
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