Comprehensive benefit evaluation of planting models for the prevention and control of celery non-point source pollution

The questionnaire survey, analytic hierarchy process, expert consultation methods were adopted to construct a comprehensive benefit evaluation index system with 12 indexes, for the evaluation of planting models for the prevention and control of celery non-point source pollution, considering economic benefit, product quality and environmental benefit. Based on the index system, an empirical study was carried out to evaluate benefits of different planting models for non-point source pollution control, combining different fertilization methods, application of soil loosening and rooting agent and bio-based film in Chaohu Lake Basin. The results showed that: the best model of economic benefit was the combination of reduced fertilization with soil loosening and rooting agent, the optimal model of product quality benefit was the reduced fertilization model, the best environmental benefit model was organic-inorganic mixture fertilization plus soil loosening and rooting agent plus bio-based film model, and the optimal comprehensive benefit mode was the combination of organic-inorganic mixture fertilization, rooting agent and bio-based film model. Combined with the experimental results, the reduced fertilization and organic-inorganic mixed fertilization should be preferred, and the technical combination of soil loosing and rooting agent and bio-based film can effectively improve the comprehensive benefits.