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Library Estimation of Grain Crop Yields after Returning the Illegal Nurseries and Orchards to Cultivated Land in the Yangtze River Delta Region

Estimation of Grain Crop Yields after Returning the Illegal Nurseries and Orchards to Cultivated Land in the Yangtze River Delta Region

Estimation of Grain Crop Yields after Returning the Illegal Nurseries and Orchards to Cultivated Land in the Yangtze River Delta Region

Resource information

Date of publication
december 2021
Resource Language
ISBN / Resource ID
LP-midp000453

The purpose of this study is to develop a new remote sensing method to assess the area of cultivated land illegally converted to nurseries and orchards in the Yangtze River Delta region of China over the past 40 years (1980–2020), and then estimate the increase in grain yield based on this area. Our result showed that 2.23 × 104 km2 of cultivated land was reduced by 11.8% over the past 40 years. About 14,521.40 km2 of cultivated land was converted to nursery and orchard from 1980 to 2020. The conversion area was unevenly distributed among different administrative regions. Zhejiang and Anhui Provinces had higher conversion rate and area than Jiangsu Province and Shanghai Municipalities. After the illegal nurseries and orchards return to cultivated land, if rotation farming mode is adopted, in which each grain crop is planted only once a year, the increased production of rice, wheat, corn, beans and tubers will reach (632.57 ± 13.08) × 104, (0~531.05 ± 33.25) × 104, (0~556.19 ± 30.36) × 104, (0~249.85 ± 13.14) × 104 and (0~489.11 ± 28.14) × 104 tons at most in each year, respectively. Our results provide theoretical guidance for implementing food security policies and alleviating contradiction between grain production and rural labor shortages in the Yangtze River Delta region.

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Authors and Publishers

Author(s), editor(s), contributor(s)

Han, YiruiPan, QinqinCao, YueeZhang, JianhongYuan, JiaxuanLi, BoruiLi, SaiqiangMa, RenfengLuo, XuSha, LongbinYang, Xiaodong

Corporate Author(s)
Geographical focus