Spatial and temporal analysis of drought risk during the crop-growing season over northeast China

Yu, Xingyang; He, Xingyuan; Zheng, Haifeng; Guo, R.T.; Ren, Zhibin; Zhang, Dan; Lin, Jixiang

doi:10.1007/s11069-013-0909-2

Cited by 71 publications

(42 citation statements)

References 43 publications

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“…Yu et al [8] found that the regional mean precipitation during the crop-growing season in Northeast China had decreased significantly from 1960 to 2009 and drought occurrence and severity had increased since 1996. Our results confirm the decreased precipitation and the SPI results suggest a province-wide increase in drought frequency, drought duration, and drought magnitude during the main crop growth stages over the past five decades, accounting for 96%, 91%, and 91% of stations, with 5%, 11%, and 9% passing the p < 0.05 significance level, respectively.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Drought Impact on Main Cereal Crops Using a Standardized Precipitation Evapotranspiration Index in Liaoning Province, China

et al. 2016

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Abstract:Global warming has resulted in increasingly frequent and severe drought and/or precipitation events. Severe drought limits crop water availability and impacts agricultural productivity and socioeconomic development. To quantify drought-induced yield loss during the main crop stages in Liaoning province, China, aspects of drought episodes (magnitude, duration, and frequency) were investigated during the period 1960-2015 using the Standardized Precipitation Index (SPI) and the Standardized Precipitation Evapotranspiration Index (SPEI), respectively. Then the relationship between the SPI/SPEI and the standardized yield residuals series (SYRS), and the drought-induced yield loss were analyzed for maize, rice, sorghum, soybean, and millet. Liaoning underwent a province-wide increase in temperature, reduced precipitation, and reduced reference crop evapotranspiration. As expected, Liaoning experienced province-wide meteorological drying trends during the main crop growth stages, while the drought frequency, duration, and magnitude were not as serious as revealed by using the SPI. As compared to the SPI, the SPEI considering potential evapotranspiration explained 39%-78% yield variability of SYRS and evaluated the drought-induced yield loss more accurately. The increased drought frequency mainly affected the rain-fed crops (maize, sorghum, soybean, and millet), while it did not reduce irrigated rice production. No major impact was exerted on the rain-fed crops caused by mild drought. However, severe drought (SPEI < −1.0) markedly reduced yield performance, in particular at the anthesis-silking stage for maize, the jointing-booting stage for sorghum, the flowering-podding stage for soybean, and the sowing-milking stage for millet. It is concluded that the SPEI is a more useful measure for the identification of drought episodes and the assessment of drought impact on agricultural production in Liaoning province.

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Section: Discussionmentioning

confidence: 99%

Assessment of Drought Impact on Main Cereal Crops Using a Standardized Precipitation Evapotranspiration Index in Liaoning Province, China

et al. 2016

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“…However, the yield gap to the potential of 10.9 t ha −1 is still large (Liu et al, 2012), mainly due to frequent summer droughts. Due to the increasing probability of extreme climate events (IPCC, 2007), water stress for agricultural production is likely to increase in this region (Song et al, 2014;Yu et al, 2014) which is detrimental for crop photosynthesis and yield (Richards, 2000).…”

Section: Introductionmentioning

confidence: 99%

Morphological plasticity of root growth under mild water stress increases water use efficiency without reducing yield in maize

et al. 2017

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Abstract. A large yield gap exists in rain-fed maize (Zea mays L.) production in semi-arid regions, mainly caused by frequent droughts halfway through the crop-growing period due to uneven distribution of rainfall. It is questionable whether irrigation systems are economically required in such a region since the total amount of rainfall does generally meet crop requirements. This study aimed to quantitatively determine the effects of water stress from jointing to grain filling on root and shoot growth and the consequences for maize grain yield, above-and below-ground dry matter, water uptake (WU) and water use efficiency (WUE). Pot experiments were conducted in 2014 and 2015 with a mobile rain shelter to achieve conditions of no, mild or severe water stress. Maize yield was not affected by mild water stress over 2 years, while severe stress reduced yield by 56 %. Both water stress levels decreased root biomass slightly but shoot biomass substantially. Mild water stress decreased root length but increased root diameter, resulting in no effect on root surface area. Due to the morphological plasticity in root growth and the increase in root / shoot ratio, WU under water stress was decreased, and overall WUE for both above-ground dry matter and grain yield increased. Our results demonstrate that an irrigation system might be not economically and ecologically necessary because the frequently occurring mild water stress did not reduce crop yield much. The study helps us to understand crop responses to water stress during a critical water-sensitive period (middle of the crop-growing season) and to mitigate drought risk in dry-land agriculture.

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“…Drought is a silent and pervasive hazard, which originates from the deficit of water availability, with devastating impacts on agriculture, water supply and the environment (Dow 2010;Popova et al 2014;Yu et al 2014) causing economic losses (Below et al 2007;Wilhite 2000;Wilhite et al 2007). In comparison with other natural hazards, drought tends to start slowly often without warning, lasts for significant period of time covering large spatial areas, and may linger for years after termination (Lena et al 2013;Mishra and Singh 2010;Rossi et al 1992).…”

Section: Introductionmentioning

confidence: 99%

Drought risk assessment in central Nepal: temporal and spatial analysis

et al. 2015

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This paper presents temporal and spatial pattern of drought phenomena in central Nepal using standardized precipitation index (SPI) at multiple time scales. The study is based on 32 years of monthly precipitation data from 40 meteorological stations from 1981 to 2012. Results indicate that, while there is no distinct trend in regional precipitation, interannual variation is large. Trend analysis of drought index shows that most stations are characterized by increases in both severity and frequency of drought and trend is stronger for longer drought time scales. Over the study period, the summer 123Nat Hazards (2016) 80:1913-1932 DOI 10.1007/s11069-015-2055 season of 2004, 2005, 2006, 2009 and winters 2006, 2008 and 2009 were the worst widespread droughts. These dry periods have a serious impact on agriculture-livestock production of central Nepal. Better understanding of these SPI dynamics could help in understanding the characteristics of droughts and also to develop effective mitigation strategies.

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Spatial and temporal analysis of drought risk during the crop-growing season over northeast China

Cited by 71 publications

References 43 publications

Assessment of Drought Impact on Main Cereal Crops Using a Standardized Precipitation Evapotranspiration Index in Liaoning Province, China

Assessment of Drought Impact on Main Cereal Crops Using a Standardized Precipitation Evapotranspiration Index in Liaoning Province, China

Morphological plasticity of root growth under mild water stress increases water use efficiency without reducing yield in maize

Drought risk assessment in central Nepal: temporal and spatial analysis

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