Connotation analysis and evaluation index system construction of regional agricultural soil and water resource composite system harmony

In view of the insufficient judgment criterion for the sustainable development of regional agricultural systems and the problem of easily increasing system uncertainty, by introducing the theory of harmony, the regional agricultural water and soil resource system can be regarded as a composite system and can be integrated with research on harmony. This study was based on a systematic literature review used to define the theory and judgment basis of agricultural water and soil resource composite system harmony (AWSRCSH). The Jiansanjiang Management Bureau of Heilongjiang Provincial Agricultural Reclamation in China was used as an example to construct an evaluation index system of AWSRCSH. The results showed that the so-called AWSRCSH indicated that the humanities, agriculture and resource subsystems were in healthy states of operation, the external subsystems were tuned and balanced, and the entire system presented a stable, consistent and balanced form. According to the "three deletions, one consolidation and one addition" strategy, the index primary election library (347 indicators) was reduced to 79 indicators, and the variation coefficient-R clustering-gray correlation advantage (VC- RC-GCA) model and expert knowledge were used to obtain 23 quantitative indicators and 3 qualitative indicators, of which there were 7, 11 and 8 indicators in the fields of humanities, agriculture and resources, respectively. By comparing the RC-GCA model screening results and the human-water harmony index system features, the rationality and reliability of the index system built based on the VC-RC-GCA model were verified. (C) 2020 Elsevier Ltd. All rights reserved.