Various maize yield losses and their dynamics triggered by drought thresholds based on Copula-Bayesian conditional probabilities

Li, Pei; Huang, Qiang; Huang, Shengzhi; Leng, Guoyong; Peng, Jian; Wang, Hao; Zheng, Xudong; Li, Yifei; Fang, Wei

doi:10.1016/j.agwat.2021.107391

Cited by 31 publications

(5 citation statements)

References 41 publications

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“…Moderate agricultural drought indicated a noticeable impact, and severe and extreme agricultural droughts showed a more substantial and detrimental effect on maize production. The findings are comparable with those reported by Li et al [89], whose study found that 30%, 40%, and 50% of maize yield losses were induced by moderate, severe, and extreme droughts, respectively. Similar conclusions have been reached by Wang et al [69], whose study found that maize yield losses of 3.2% and 14.0% were recorded during moderate drought and severe drought, respectively.…”

Section: Discussionsupporting

confidence: 91%

Assessing the Impact of Agricultural Drought on Yield over Maize Growing Areas, Free State Province, South Africa, Using the SPI and SPEI

Makuya,

Tesfuhuney,

Moeletsi

et al. 2024

Sustainability

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Maize (Zea mays L.) is an essential crop in South Africa serving as a staple food; however, agricultural drought threatens its production, resulting in lower yields. This study aimed to assess the impact of agricultural drought on maize yield in the major areas (Bethlehem, Bloemfontein, and Bothaville) that produce maize in the Free State Province from 1990 to 2020. The study used the Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspiration Index (SPEI) to examine drought occurrences and severity during the maize growing season (October–March). The Standardized Yield Residuals Series (SYRS), Crop Drought Resilient Factor (CDRF), Spearman’s Rank Correlation (rs), and yield loss rate were employed to emphasize agricultural drought impact on maize yield. The results based on the SPI and SPEI show that drought frequently occurred in Bethlehem, followed by Bloemfontein and Bothaville. Drought severity indicated that moderate droughts were prevalent in Bethlehem, while severe droughts were in all areas (Bethlehem, Bloemfontein, and Bothaville) and extreme droughts in Bloemfontein. The agricultural drought’s impact on maize varied across growth seasons and areas. Notably, the lowest SYRS value of −2.38 (1991/92) was observed in Bethlehem. An extremely strong significant correlation (rsSPEI-6 vs SYRS = 0.83, p = 1.07 × 10−8) was observed between the SPEI and SYRS in Bloemfontein during the October–November–December–January–February–March (ONDJFM) season. The CDRF indicated that maize yield was severely non-resilient (CDRF < 0.8) to drought in Bethlehem (CDRF = 0.27) and Bloemfontein (CDRF = 0.33) and resilient (CDRF = 1.16) in Bothaville. The highest maize yield loss of −88.62% was observed in Bethlehem due to extreme agricultural drought. The results suggest that, historically, agricultural drought was a threat to maize production in the studied areas, particularly in Bethlehem and Bloemfontein. This underscores the implementation of sustainable agricultural practices, such as drought-resistant varieties in these areas, to mitigate the impacts of climate change, especially drought, and ensure food security. This is a step toward achieving Sustainable Development Goal 2 (Zero Hunger).

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Section: Discussionsupporting

confidence: 91%

Assessing the Impact of Agricultural Drought on Yield over Maize Growing Areas, Free State Province, South Africa, Using the SPI and SPEI

Makuya,

Tesfuhuney,

Moeletsi

et al. 2024

Sustainability

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“…It can be seen that the correlation between the drought area and the yield per unit area of spring maize was relatively high from the jointing to the heading stage, and the correlation between the drought area and the yield per unit area was relatively low from the milk-mature to the mature stage. Most studies also showed that drought from the jointing to the heading stage and from the heading to the milk-mature stage was the main reason for the yield reduction of spring maize [58,59]. Although drought was not the only disaster that caused the decrease in spring maize yield, it also indirectly indicated the effectiveness of drought-monitoring results in this study.…”

Section: Reliability Analysis Of Drought-monitoring Resultsmentioning

confidence: 54%

Drought Monitoring of Spring Maize in the Songnen Plain Using Multi-Source Remote Sensing Data

Pei,

Fan,

2023

Atmosphere

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Agricultural production is highly susceptible to the impact of drought. How to improve agricultural drought-monitoring capability has always been a research hotspot. Based on multi-source remote-sensing data, a novel comprehensive drought index (CDI) for spring maize was developed using the random forest model, and its feasibility was tested by using agricultural drought indices and agricultural statistics in this study. Then, the spatiotemporal characteristics of spring maize drought in the Songnen Plain from 2001 to 2018 were evaluated using the CDI. The results showed that: (1) the CDI effectively monitored spring maize drought in the Songnen Plain, outperforming other drought indices. (2) The monitoring results indicated that spring maize in the Songnen Plain was affected by large-scale droughts in 2001, 2004, 2007, and 2017, which was consistent with national drought disaster statistics. (3) By changing the drought barycenter, the drought barycenter of spring maize generally tended to the south and west of the Songnen Plain, so drought-prevention measures should be strengthened in these areas in the future. While factors affecting crop yield extended beyond drought, the variations in spring maize yield indirectly reflected the effectiveness of drought monitoring in this study.

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“…In the production of maize in semiarid areas, irrigation is the key to increasing maize yield. In addition, the summer rainy and hot season in semiarid areas has a high potential for crop yield [4,15]. Reasonable irrigation is very important for improving crop yield and protecting the ecological environment.…”

Section: Discussionmentioning

confidence: 99%

“…The stable increase in maize production plays an important role in promoting the socioeconomic development of countries around the world [3]. The uneven distribution of natural precipitation in the arid and semiarid areas where maize is grown, coupled with the increasingly evident phenomenon of climate warming, drying, and seasonal droughts [4], can easily hinder the ability of maize roots to absorb water and nutrients [5], slow leaf physiological metabolism [6], and growth and development processes [7], and ultimately lead to a decrease in grain yield [8]. Agricultural irrigation is an important way to maintain crop Agriculture 2023, 13, 1682 2 of 17 yields in arid and semiarid regions [9].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Drip Irrigation Quota on Biochemical Activities and Yield-Related Traits in Different Drought-Tolerant Maize Varieties

Xu,

Li,

Zhuang

et al. 2023

Agriculture

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Drip irrigation has a close relationship with the growth and development of maize grains and yield formation in semiarid areas. To explore the response mechanism of grain yield formation to drip irrigation quotas, a 2-year pond planting experiment was conducted under controlled conditions, by using two maize varieties with differences in drought resistance as experimental materials. Six treatments were set up, including CK1 (drought-resistant variety, 500 mm), T1 (drought-resistant variety, 350 mm), T2 (drought-resistant variety, 200 mm), CK2 (drought-sensitive variety, 500 mm), T3 (drought-sensitive variety, 350 mm), and T4 (drought-sensitive variety, 200 mm). The changes in maize grain filling characteristics, related hormones, enzyme activity related to starch synthesis, sugars and amino acids contents, and yield were analysed. The results showed that 100-grain weight at different filling times, filling rate, average filling rate, auxin, cytokinin, acid sucrose invertase, sucrose synthase, starch synthase, and adenosine diphosphate glucose pyro phosphorylase activities in maize grains decreased and the abscisic acid content and content of various amino acids and sugars in grains increased with the decrease in drip irrigation quota. The percentage of changes in drought-sensitive maize varieties was relatively high. The maize yield decreased with the decrease in drip irrigation quota. In summary, there was no significant difference in grain filling characteristics, hormone content, starch synthesis enzyme activity, and yield between maize treated with T1 (drought-resistant variety, 350 mm) and the control treatment. This effectively maintained grain growth and yield formation, achieving the goal of water saving and stable yields.

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Various maize yield losses and their dynamics triggered by drought thresholds based on Copula-Bayesian conditional probabilities

Cited by 31 publications

References 41 publications

Assessing the Impact of Agricultural Drought on Yield over Maize Growing Areas, Free State Province, South Africa, Using the SPI and SPEI

Assessing the Impact of Agricultural Drought on Yield over Maize Growing Areas, Free State Province, South Africa, Using the SPI and SPEI

Drought Monitoring of Spring Maize in the Songnen Plain Using Multi-Source Remote Sensing Data

The Effect of Drip Irrigation Quota on Biochemical Activities and Yield-Related Traits in Different Drought-Tolerant Maize Varieties

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