Agricultural production structure adjustment based on a multi-objective control in the Tiaoxi watershed

doi:10.3785/j.issn.1008-9209.2018.01.191

Journal of Zhejiang University (Agriculture and Life Sciences)

2019, Vol. 45

Issue (1): 66-74 DOI: 10.3785/j.issn.1008-9209.2018.01.191

Resource utilization & environmental protection

Agricultural production structure adjustment based on a multi-objective control in the Tiaoxi watershed

Zhennan YE¹(

),Fei’er WANG¹(

),Lingye JI¹,Jie YU²

1. College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
2. Zhejiang Environmental Monitoring Center, Hangzhou 310012, China

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Abstract

The optimization of agricultural production structure is an important way to control the agricultural non-point source (NPS) pollution. In this paper, a multi-objective programming model was used to optimize the agricultural production structure in the Tiaoxi watershed, with the objective of agricultural NPS pollution reduction. The development of agricultural economy and the demand for agricultural products were chosen as the constraints in the model. According to the agricultural output in the year of 2014, three schemes including less output, medium output and more output were optimized by the multi-objective programming model. The results showed that the reduction of agricultural NPS pollution load in the three schemes from high to low were less output scheme, medium output scheme, more output scheme, respectively. However, the reduction varied among different areas. The optimized results showed that the transformation of outdoor vegetable cultivation to facility vegetable cultivation was obvious compared with 2014. The scale of pigs and cattle culture decreased significantly, while sheep culture increased moderately. The adjustment of paddy and aquaculture was slight. The results of water quality prediction under different schemes also showed that the improvement of water quality under the less output scheme was better than the others, but it was not obvious as compared with the medium output scheme.Taking the control demand of non-point source pollution, the economic output of agriculture and the improvement effect of water environment quality into consideration, the medium output scheme is better for the current agricultural economic development and environmental protection in this watershed.

Key words： multi-objective programming model non-point source pollution agricultural production structure pollution reduction

Received: 19 January 2018 Published: 28 March 2019

CLC:	X 506
	X 522

Corresponding Authors: Fei’er WANG E-mail: yezhennan@zju.edu.cn;wangfeier@zju.edu.cn

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Cite this article:

Zhennan YE,Fei’er WANG,Lingye JI,Jie YU. Agricultural production structure adjustment based on a multi-objective control in the Tiaoxi watershed. Journal of Zhejiang University (Agriculture and Life Sciences), 2019, 45(1): 66-74.

URL:

http://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2018.01.191 OR http://www.zjujournals.com/agr/Y2019/V45/I1/66

基于多目标控制的苕溪流域农业产业结构调整

利用多目标规划模型，以农业面源污染减排为目标，以农业经济发展和农产品需求保障等为约束，开展苕溪流域农业产业结构优化，基于2014年流域农业产业结构及排污现状，设置减产型、保产型、增产型3种不同发展情景。结果表明，在3种情景下农业面源等标污染减排量从大到小依次为减产型>保产型>增产型，但在不同地区存在一定的差异。产业结构优化结果显示，流域内产业结构变动幅度较大的趋势为露天蔬菜向设施蔬菜转型，猪牛的养殖规模大量缩减而羊的养殖规模适度扩大，而水稻种植、淡水养殖等变化幅度相对较小。在不同情景方案下水质预测结果同样显示，减产型方案对水质的改善优于保产型与增产型，但相较于保产型提升幅度不大。综合考虑流域面源污染控制需求、农业经济产出与水环境质量提升效果，保产型方案更加符合当前流域农业经济发展与环境保护的目的。

关键词： 多目标规划模型, 面源污染, 农业产业结构, 污染减排

Fig. 1 Scope of Tiaoxi watershed

Table 1 Equal standard pollution discharge coefficient of agricultural non-point source (NPS) pollution in the Tiaoxi watershed ^{[10,11,12,13,14,15,16,17,18,19,20,21,22]}

Table 2

Table 3 Optimization scheme of agricultural structure in the Tiaoxi watershed

Fig. 2 Discharge of equal standard pollutant in each county under the optimization schemes

Fig. 3 Monthly NH₃-N concentration of key monitoring sections in adjustment schemes


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