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首页> 外文期刊>Journal of Water and Land Development >Impact of meteorological drought on crop water deficit and crop yield reduction in Polish agriculture
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Impact of meteorological drought on crop water deficit and crop yield reduction in Polish agriculture

机译：气象干旱对波兰农业作物水资源缺陷和作物产量的影响

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摘要

The study presents the quantification of the effect of meteorological drought on crop water deficit and crop yield reduction in different agro-climatic regions of Poland. The regression equations describing the relationship between the standardized precipitation index SPI (meteorological drought) and the crop drought index CDI (evapotranspiration reduction) were used in a first step. Then the FAO equation describing the relationship between CDI and yield reduction was used. Crop water deficit measured by CDI is spatially differentiated and depends on the intensity of meteorological drought and soil water availability. The greatest evapotranspiration reduction is found for late potato growing in the central-west Poland (30-60%). The smallest reduction of evapotranspiration was stated for winter rape (12-16%) in the same region on soils with small water retention and no reduction can be on soils with large water retention. A good correlation between estimated and observed yield reduction was found. Potential yield reduction of late potato can reach more than 50% in central Poland. Least yield reduction is for winter wheat and winter rape. The main advantage of the method used in the study is the combination of meteorological drought, soil water retention capacity, evapotranspiration, soil water balance and crop yield, and so help provide more accurate assessments.
机译：该研究提出了定量气象干旱对波兰不同农业气候区域作物水资源缺陷和作物产量的影响。描述了描述标准化降析指数SPI（气象干旱）与作物干旱指数CDI（蒸发蒸腾降低）之间的关系的回归方程被用在第一步中。然后使用描述CDI与产量减少之间关系的FAO方程。通过CDI测量的作物水缺陷在空间上分化，取决于气象干旱和土壤水量的强度。发现最大的蒸散量减少，在中西部波兰（30-60％）生长的后期马铃薯。冬季强奸（12-16％）在含有小水保留的土壤中的冬季强奸（12-16％）表示最小的减少，并且没有减少水潴留的土壤。发现估计和观察结果之间的良好相关性。晚马铃薯的潜在产量降低在波兰中部可达到50％以上。减少最低屈服于冬小麦和冬季强奸。该研究中使用的方法的主要优点是气象干旱，土壤保险能力，蒸散，土壤水平和作物产量的结合，因此有助于提供更准确的评估。

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