Early warning of cultivated land quality in Henan province

doi:10.14088/j.cnki.issn0439-8114.2020.02.012

Abstract

Abstract: The cultivated land productivity early warning system is established to provide critical warning for regional cultivated land quality and provide early warning for the decline of cultivated land productivity. The negative number principle method is used to divide the warning threshold. Various models are established to calculate the change of cultivated land productivity caused by the different quantity of supplementary cultivated land and occupation cultivated land, the change of cultivated land productivity caused by the different quality of supplementary cultivated land and occupation cultivated land, the change of cultivated land productivity caused by the Land remediation. The results show that the change of cultivated land quantity has different influence on the quality and productivity of cultivated land. Affected by the different quality of supplementary cultivated land and occupation cultivated land, the relationship between cultivated land quantity and quality is non-positive but the relationship between cultivated land quantity and productivity is positively. Affected by different causes of cultivated land quality change, the change of cultivated land quality and productivity is not proportional to each other. Cultivated land productivity can better reflect the health status of regional cultivated land protection. The construction of cultivated land quality can improve the quality and productivity of cultivated land when the quantity cannot be balanced. The analysis of the early warning results and causes of cultivated land can provide more targeted measures for regional cultivated land protection. It is concluded that cultivated land productivity can be used as an early warning index of cultivated land quality. Early warning of cultivated land quality can avoid the serious deterioration of cultivated land quality. The early warning results can provide real-time services for the continuous utilization of land resources. The results have certain foresight to cultivated land grain production. The results are helpful to ensure the stability and safety of food production under sustainable development.

Key words: cultivated land quality, cultivated land productivity, cultivated land quantity, early warning, Henan province

CLC Number:

F301.21

SONG Yan-hua, WANG Ling-chao. Early warning of cultivated land quality in Henan province[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(2): 55-61.

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