Impact of climate variability on rain-fed maize and sorghum yield among smallholder farmers

Abdisa, Teka Bekuma; Diga, Girma Mamo; Tolessa, Alemayehu Regassa

doi:10.1080/23311932.2022.2057656

Cited by 17 publications

(5 citation statements)

References 27 publications

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“…Although there has not yet been an agreement regarding the physiological effects of Tmin on plants as there is an inclination of the crop-climate research towards the Tmax or Tavg and overlooking the Tmin 112 , 113 . The current study's findings on the positive association of Tmin and maize yield were supported by evidence from the literature, which included studies using statistical modeling 87 , 114 – 121 as well as simulation-based studies 122 , 123 . This is attributable to the fact that the increased Tmin speeds up night-time respiration, resulting in carbohydrates losses 124 .…”

Section: Resultssupporting

confidence: 71%

Climate trends and maize production nexus in Mississippi: empirical evidence from ARDL modelling

Sharma,

Dhillon,

Kumar

et al. 2023

Sci Rep

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Climate change poses a significant threat to agriculture. However, climatic trends and their impact on Mississippi (MS) maize (Zea mays L.) are unknown. The objectives were to: (i) analyze trends in climatic variables (1970 to 2020) using Mann–Kendall and Sen slope method, (ii) quantify the impact of climate change on maize yield in short and long run using the auto-regressive distributive lag (ARDL) model, and (iii) categorize the critical months for maize-climate link using Pearson’s correlation matrix. The climatic variables considered were maximum temperature (Tmax), minimum temperature (Tmin), diurnal temperature range (DTR), precipitation (PT), relative humidity (RH), and carbon emissions (CO2). The pre-analysis, post-analysis, and model robustness statistical tests were verified, and all conditions were met. A significant upward trend in Tmax (0.13 °C/decade), Tmin (0.27 °C/decade), and CO2 (5.1 units/decade), and a downward trend in DTR ( − 0.15 °C/decade) were noted. The PT and RH insignificantly increased by 4.32 mm and 0.11% per decade, respectively. The ARDL model explained 76.6% of the total variations in maize yield. Notably, the maize yield had a negative correlation with Tmax for June, and July, with PT in August, and with DTR for June, July, and August, whereas a positive correlation was noted with Tmin in June, July, and August. Overall, a unit change in Tmax reduced the maize yield by 7.39% and 26.33%, and a unit change in PT reduced it by 0.65% and 2.69% in the short and long run, respectively. However, a unit change in Tmin, and CO2 emissions increased maize yield by 20.68% and 0.63% in the long run with no short run effect. Overall, it is imperative to reassess the agronomic management strategies, developing and testing cultivars adaptable to the revealed climatic trend, with ability to withstand severe weather conditions in ensuring sustainable maize production.

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Section: Resultssupporting

confidence: 71%

Climate trends and maize production nexus in Mississippi: empirical evidence from ARDL modelling

Sharma,

Dhillon,

Kumar

et al. 2023

Sci Rep

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“…Rain-fed crops are highly sensitive to climate change. Precipitation during the growing season significantly affects maize yield, and interannual precipitation uncertainty is a serious problem threatening maize production (Abdisa et al 2022). The TA and SL values at B4, B5, and B6 in 2022 were higher than those in 2021, and the SR value was lower than that in 2021, which may be the main meteorological reasons for the lower yield in the three sowing periods in 2022 compared with that in 2021.…”

Section: Discussionmentioning

confidence: 93%

Adjusting the sowing date of fresh maize to promote grain filling, key starch synthesis enzymes, and yield

An,

Wei,

Cheng

et al. 2024

PLANT SOIL ENVIRON

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Fresh maize is rich in nutrients, widely used, and favoured by an increasing number of consumers. Fresh maize is the type of maize that is harvested at milk maturity for consumption and processing, mainly including sweet maize (Zea mays L. saccharata Sturt), waxy maize (Zea mays L. sinensis Kulesh) and sweet-waxy maize. With the adjustment of agricultural planting structure and the change in dietary structure, fresh corn has been widely planted worldwide (Mut et al. 2022, Kumar et al. 2023. Especially in China, the rapid development of fresh maize in the past two decades, the introduction of new cultivars,

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“…In the natural situation, rain was useful for salt amelioration. Otherwise, the crops planted in the summer demand more attention be paid to precipitation during the seedling stage [54]. As shown in Figure 3, the maize planted in April for saving water resources, the soil salt content can be leached to a suitable range which is not harmful to crop growth.…”

Section: Coastal Salt-affected Soils Desalination and Crop Cultivationmentioning

confidence: 99%

Saline–Alkaline Characteristics during Desalination Process and Nitrogen Input Regulation in Reclaimed Tidal Flat Soils

et al. 2023

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Coastal salt-affected soils account for a large area all around the world. Soil salinity and pH are two important parameters affecting soil quality. Investigating the correlation of electrical conductivity (EC) and pH at different soil depths in saline soil was useful for quickly assessing the saline–alkaline characteristics. During the natural desalination process in the field area of reclaimed lands, the phenomena of pH increase and nitrogen accumulation may occur. A field sampling experiment was conducted in slightly saline soil affected by natural desalination and newly reclaimed heavily saline soil. A series of soil–water ratio extracts consisting of 1:2.5, 1:5, 1:10, 1:20, and 1:40 was designed to measure the EC and pH for simulating the saline–alkaline characteristics during the soil desalination process. Meanwhile, for reasonable utilization of the naturally ameliorated slightly saline soil which consists of a high content of nitrogen, a plastic mulching (PM) accompanied with nitrogen (N) fertilizer addition experiment in maize cultivation plots was designed. Results showed that a significant correlation of EC and/or pH existed in all ratios of soil extracts, and the slightly saline soil had a higher nitrogen content (1.06 g kg−1). The EC was negatively correlated with pH at a depth of 0~100 cm in the coastal saline soil, which indicated the increase of pH value and alkalization during its natural desalination. Furthermore, PM treatments showed no significant difference with N treatments in soil bulk density and soil water content in the slightly saline soil. The PM and N treatments obtained similar grain yield, which was between 6.2 and 6.5 t ha−1. The soil salinity decreased in all treatments and the harvest index was largest in PM treated plots. Our study was beneficial for rapidly monitoring saline–alkaline characteristics and sustainable utilization of coastal saline soil resources. In addition, we should focus far more on pH improvement during the desalination process and rational utilization of chemical fertilizer for obtaining sustainable benefits in the coastal saline soil.

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Impact of climate variability on rain-fed maize and sorghum yield among smallholder farmers

Cited by 17 publications

References 27 publications

Climate trends and maize production nexus in Mississippi: empirical evidence from ARDL modelling

Climate trends and maize production nexus in Mississippi: empirical evidence from ARDL modelling

Adjusting the sowing date of fresh maize to promote grain filling, key starch synthesis enzymes, and yield

Saline–Alkaline Characteristics during Desalination Process and Nitrogen Input Regulation in Reclaimed Tidal Flat Soils

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