Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (4): 851-858.DOI: 10.3969/j.issn.1004-1524.2022.04.22

• Agricultural Economy and Development • Previous Articles     Next Articles

Nitrogen application rate and reduction potential in northeast China in 1987-2018

LI Bolin1(), YAN Li1,*(), WANG Jiyan1, GAO Ruixue1, GUO Liqing2,*()   

  1. 1. College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China
    2. Research Centre for Total Control and Emission Trading, Environmental Planning Institute, Ministry of Ecology and Environment, Beijing 100012, China
  • Received:2021-03-19 Online:2022-04-25 Published:2022-04-28
  • Contact: YAN Li,GUO Liqing

Abstract:

In the present study, northeast China (including Heilongjiang Province, Jilin Province and Liaoning Province) was selected as the study area. Firstly, the nitrogen application rate in 1987-2018 was investigated. Then, the nitrogen demand and nitrogen utilization rate were calculated based on the situation of 2018, and the nitrogen reduction potentials under short-term, mid-term, long-term scenarios were evaluated, respectively. It was shown that the nitrogen application rate in northeast China exhibited an overall increasing trend in 1987-2018. The nitrogen utilization rate in Heilongjiang Province was 157.11% in 2018, indicating high consumption of soil nitrogen; while the nitrogen utilization rate was 69.00% and 69.27% in Jilin Province and Liaoning Province, respectively, indicating tight balance of nitrogen input and output. Under short-term, mid-term and long-term scenarios, there was no nitrogen reduction potential in Heilongjiang Province. Under short-term scenario, the nitrogen reduction potential was 47.19% and 46.99% in Jilin Province and Liaoning Province, respectively. Under mid-term scenario, there was no nitrogen reduction potential in Jilin Province and Liaoning Province. Under long-term scenario, with application of organic fertilizers, the nitrogen reduction potential was 26.07% and 25.78% in Jilin Province and Liaoning Province, respectively.

Key words: chemical fertilizer reduction, crop nutrient demand, nitrogen fertilizer

CLC Number: