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首页> 美国卫生研究院文献>Scientific Reports >Evaluating agroclimatic constraints and yield gaps for winter oilseed rape (Brassica napus L.) – A case study
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Evaluating agroclimatic constraints and yield gaps for winter oilseed rape (Brassica napus L.) – A case study

机译：评估冬季油料油菜（甘蓝型油菜）的农业气候制约因素和单产缺口–案例研究

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Evaluating the effects of agroclimatic constraints on winter oilseed rape (WOSR) yield can facilitate the development of agricultural mitigation and adaptation strategies. In this study, we investigated the relationship between the WOSR yield and agroclimatic factors using the yield data collected from Agricultural Yearbook and field experimental sites, and the climate dataset from the meteorological stations in Hubei province, China. Five agroclimatic indicators during WOSR growth, such as ≥0 °C accumulated temperature (AT-0), overwintering days (OWD), precipitation (P), precipitation at an earlier stage (EP) and sunshine hours (S), were extracted from twelve agroclimatic indices. The attainable yield for the five yield-limiting factors ranged from 2638 kg ha−1 (EP) to 3089 kg ha−1 (AT-0). Farmers (Yfarm) and local agronomists (Yexp) have achieved 63% and 86% of the attainable yield (Yatt), respectively. The contribution of optimum fertilization to narrow the yield gap (NYexp) was 52% for the factor P, which was remarkably lower than the mean value (63%). Overall, the precipitation was the crucial yield-limiting agroclimatic factor, and restricted the effect of optimizing fertilization. The integrated data suggest that agricultural strategies of mitigation and adaptation to climatic variability based on different agroclimatic factors are essential for improving the crop yield.
机译：评估农业气候制约因素对冬季油菜（WOSR）产量的影响可以促进农业减缓和适应战略的发展。在这项研究中，我们使用从《农业年鉴》和田间试验地点收集的产量数据以及来自中国湖北省气象站的气候数据集，研究了WOSR产量与农业气候因素之间的关系。从中提取了WOSR生长期间的5个农业气候指标，例如≥0°C的累积温度（AT-0），越冬天（OWD），降水（P），早期降水（EP）和日照时间（S）。十二种农业气候指数。这五个限产因子的可达到产量为2638 kg ha -1 （EP）至3089 kg ha -1 （AT-0）。农民（Yfarm）和当地农艺师（Yexp）分别达到了可实现产量（Yatt）的63％和86％。因子P的最佳施肥对缩小产量差距（NYexp）的贡献为52％，明显低于平均值（63％）。总体而言，降水是限制产量的关键农业气候因素，并限制了优化施肥的效果。综合数据表明，基于不同农业气候因素的缓解和适应气候变化的农业策略对于提高作物产量至关重要。

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