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首页> 外文期刊>The Journal of Agricultural Science >Multi-scale assessment of winter wheat yield gaps with an integrated evaluation framework in the Huang-Huai-Hai farming region in China
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Multi-scale assessment of winter wheat yield gaps with an integrated evaluation framework in the Huang-Huai-Hai farming region in China

机译：中国黄淮海农业地区综合评价框架多规模评价冬小麦产量差距

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摘要

Quantifying reasonable crop yield gaps and determining potential regions for yield improvement can facilitate regional plant structure adjustment and promote crop production. The current study attempted to evaluate the yield gap in a region at multi-scales through model simulation and farmer investigation. Taking the winter wheat yield gap in the Huang-Huai-Hai farming region (HFR) for the case study, 241 farmers' fields in four typical high-yield demonstration areas were surveyed to determine the yield limitation index and attainable yield. In addition, the theoretical and realizable yield gap of winter wheat in 386 counties of the HFR was assessed. Results showed that the average field yield of the demonstration plots was 8282 kg/ha, accounting for 0.72 of the potential yield, which represented the highest production in the region. The HFR consists of seven sub-regions designated 2.1-2.7: the largest attainable yield gap existed in the 2.6 sub-region, in the southwest of the HFR, while the smallest was in the 2.2 sub-region, in the northwest of the HFR. With a high irrigated area rate, the yield gap in the 2.2 sub-region could hardly be reduced by increasing irrigation, while a lack of irrigation remained an important limiting factor for narrowing the yield gap in 2.3 sub-region, in the middle of the HFR. Therefore, a multi-scale yield gap evaluation framework integrated with typical field survey and crop model analysis could provide valuable information for narrowing the yield gap.
机译：量化合理的作物产量间隙并确定产量改善的潜在区域可以促进区域植物结构调整和促进作物生产。目前的研究试图通过模拟模拟和农民调查评估多尺度的区域的产量差距。以冬小麦养殖区（HFR）为案例研究，调查了四个典型的高收益示范区域中的241个农民领域，以确定产量限制指数和可达到的产量。此外，评估了386个HFR县冬小麦的理论和可实现的产量差距。结果表明，演示情节的平均场收益率为8282千克/公顷，占潜在产量的0.72，其中代表该地区的最高产量。 HFR由七个子区组成2.1-2.7：在HFR西南部的2.6个子区域中存在最大的可达到的收益率差距，而最小的是在HFR的西北部的2.2个子区域。 。通过高灌溉面积率，通过增加灌溉几乎不会降低2.2个子区域的产量间隙，而缺乏灌溉仍然是缩小2.3个子区域中的产量差距的重要限制因素，在中间HFR。因此，与典型现场调查和作物模型分析集成的多尺度产量差距评估框架可以提供有价值的信息，以缩小产量差距。

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