Effect of Rational Fertilizer for Eggplants on Nitrogen and Phosphorus Pollutants in Agricultural Water Bodies

Author:

Luo Peiyuan1,Xin Changchun1,Zhu Yuanhao2,Liu Yang3,Ling Junhong14,Wang Tianzhi1,Huang Jun1,Khu Soon-Thiam125

Affiliation:

1. School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China

2. Zhejiang Tongji Vocational College of Science and Technology, Hangzhou 310000, China

3. School of Civil Engineering, Tianjin University, Tianjin 300072, China

4. Research Institute for Environmental Innovation, Tianjin 300457, China

5. Engineering Research Center of City Intelligence and Digital Governance, Ministry of Education of the People’s Republic of China, Beijing 100083, China

Abstract

Excessive fertilizer application in the cropping industry leads to excessive nitrogen and phosphorus in surrounding water bodies, which causes farmers to increase economic cost and damage the environment. To address the problem, we built a crop-soil runoff soil column test system, setting eight fertilizer application levels for eggplants. Then, crop yield, soil fertility and pollutant concentrations in the receiving water bodies were measured. The process of fertilizer application on the water quality of surrounding receiving water bodies and the rationality of fertilizer application were analyzed. The results showed that crop yield, soil fertility, and pollutant concentrations in the receiving water increased with the increase in fertilizer application. The crop yield stabilized when the fertilizer application amount was higher than 0.12 kg/m2; the concentrations of total nitrogen (TN) and total phosphorus (TP) in the water increased significantly with the increase in fertilizer application, where particulate nitrogen (PN) and organic phosphorus (OP) were the key pollutants. In addition, crop growth had an interception effect on pollutant migration. The concentration of pollutants in the water was significantly lower in the late crop growth period (after flowering) than in the early. The crop had the best interception effect on pollutants when the fertilizer application was 0.12 kg/m2. The concentrations of TN and TP in the water were 29.7% and 22.3% after the flowering period, being lower than those before the flowering period. Therefore, a reasonable value of 0.12 kg/m2 is recommended for fertilizer application in this article. It can provide a reference for the fertilization system of eggplant planting in North China and theoretical support for the realization of clean production in small rural watershed planting.

Funder

National Natural Science Fund Independent Innovation Fund of Tianjin University

Publisher

MDPI AG

Subject

Process Chemistry and Technology,Chemical Engineering (miscellaneous),Bioengineering

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. USE OF MICROBIAL PREPARATIONS AND HUMICS FERTILIZER FOR EGGPLANT GROWING IN FILM GREENHOUSES;Naukovì Dopovìdì Nacìonalʹnogo Unìversitetu Bìoresursiv ì Prirodokoristuvannâ Ukraïni;2023

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