Suitability Evaluation of Reclaimed Cultivated Lands in Rural Homestead:A Case Study of Xiqing District, Tianjin City, China

• Main Authors: SUN Ya-fang, WANG Zu-wei
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2017-12-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: reclaimation, homestead, cultivation suitability, Delphi method, analytic hierarchy process, fuzzy mathematics method
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2018/1/20180104.htm

The rural homestead reclaimation is the potential of arable land, which is one of the important ways to supplement the occupied land. The reclaimation should give consideration to both quality and efficiency, and the appropriateness of cultivated land is conducive to more effective and targeted reclaimation of homestead. At the same time, it is of some guiding significance to evaluate the quality of the homestead. Based on the soil of rural homestead in Xiqing district, Tianjin, the soils of the homestead and ordinary cultivated lands were studied,eleven evaluation factors were selected through field survey sampling and indoor soil physical and chemical properties analysis to obtain experimental data, then the appropriateness evaluation model of cultivated land was established by means of the Delphi method, analytic hierarchy process and fuzzy mathematics method. And then the data of soil and arable land in reclaimed land were used to verify the reliability of arable land suitability evaluation model. Finally, the farmland suitability of the soil of Tianjin homestead was evaluated. The suitability of homestead soil was 4.41, which in level 8 or 9 of national standards. Compared with cultivated soil, the organic matter, total nitrogen, available phosphorus and available potassium contents of the homestead soil were low. The use of fertilizers such as nitrogen, phosphate and organic matter should be increased in appropriate amount during reclamation. Soil bulk density and particle size were poor, so the corresponding measures should be taken when reclamation, at the same time the risk of heavy metals pollution should be emphasized.