Climate warming outweighed agricultural managements in affecting wheat phenology across China during 1981–2018

Tao, Fulu; Zhang, Liangliang; Zhang, Zhao; Chen, Yi

doi:10.1016/j.agrformet.2022.108865

Cited by 34 publications

(10 citation statements)

References 48 publications

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“…Previous studies indicated that chilling and photoperiod affect vegetation growth [54]. Similarly, photoperiod alters phenological responses to climatic factors by influencing the accumulated temperature requirements of crops [55]; this study confirmed this conclusion. Rice is a short-day crop, and its latitude adaptability is mainly related to photoperiod [53].…”

Section: Discussionsupporting

confidence: 87%

Agronomic Improvements, Not Climate, Underpin Recent Rice Yield Gains in Changing Environments

Zhang

Liu

2022

Agronomy

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Food security depends not only on the extent of climate change but also on the compensatory potentials of agronomic improvements. However, the separate contribution of these agronomic factors to rice yield remains largely unknown. Here we distinguished the impacts and relative contributions on rice yield based on statistical models and machine learning by using an observation database collected from 52 agro-meteorological stations in China from 1981 to 2018. Agronomic improvements are responsible for more than 40% of the observed rice yield change, ranging from 42.9% to 96.5% in different cropping types, and the effect increased with the latitude. Among the management considered, sowing date adjustment contributes most to late and early rice yield. Response of rice yield to nighttime temperature was stronger than that to daytime temperature, and wind speed is the main climatic contributing factor to early rice yield. The effects of wind speed on rice yield should be considered for the adaptation measures. This observation-based evidence may help guide agricultural priorities in mitigating the impact of climate change on rice yield.

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Section: Discussionsupporting

confidence: 87%

Agronomic Improvements, Not Climate, Underpin Recent Rice Yield Gains in Changing Environments

Zhang

Liu

2022

Agronomy

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“…While the temperature in autumn was low, Ta became a photosynthetic limiting factor and influenced the rhythm of the vegetation [75]. The soil moisture of this study site was insufficient and the change of intra-day Ta impacted on leaf morphology (high temperature will make the leaf curl), which may be the reason why Ta significantly affected f esc at the half-hour scale [90]. The reasons for the significant influence of Ta on f esc at a daily scale can be explained from two aspects.…”

Section: Regulation Of Sif By Environmental Factorsmentioning

confidence: 88%

Temporal Variation in Tower-Based Solar-Induced Chlorophyll Fluorescence and Its Environmental Response in a Chinese Cork Oak Plantation

Cheng

Zhang

et al. 2023

Remote Sensing

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With the development of spectrum observation technology, solar-induced chlorophyll fluorescence (SIF)—an effective substitute for photosynthesis—has been widely used to monitor crop stress, vegetation phenology and ecosystem productivity. The relationship between fluorescence and photosynthesis is complicated because they are sensitive to environmental changes. Understanding the response of SIF to environmental factors is of great significance for clarifying the variation dynamic and relationship between SIF and photosynthesis under different conditions. In this study, the canopy SIF and the environmental factors of a Quercus variabilis BI. plantation were observed simultaneously, and the response of SIF to environmental factors at a daily scale and at a half-hour scale was analyzed. The results showed that SIF had obvious seasonal and diurnal dynamics and was mainly driven by photosynthetically active radiation (PAR). The influence of PAR, air temperature (Ta), vapor pressure deficit (VPD), soil moisture (SM) and wind speed (Ws) on SIF varied with the lapse of the growing season. After eliminating the covariant effect of PAR on the Ta and VPD during the whole growing season, the relationship between VPD and SIF was found to be negative, and the effect of Ta on SIF disappeared. This study enriched the ground observation dataset and provided support for understanding the variations in the relationship between SIF and photosynthesis under different conditions.

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“…A quantitative understanding of the factors driving changes in grain filling is essential to developing agricultural information technology, crop growth models, and crop options for adaptation to climate change (Hou et al, 2021;Liu et al, 2021a;Tao et al, 2022). There is a wide geographical range in which Chinese maize is grown; one of large differences between regions is the level of solar radiation (Liu et al, 2021a).…”

Section: Discussionmentioning

confidence: 99%

Quantitative Relationship Between Solar Radiation and Grain Filling Parameters of Maize

et al. 2022

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A quantitative understanding of the factors driving changes in grain filling is essential for effective prioritization of increasing maize yield. Grain filling is a significant stage in maize yield formation. Solar radiation is the energy source for grain filling, which is the ultimate driving factor for final grain weight and grain filling capacity that determine maize yield. Here, we first confirmed the quantitative relationships between grain filling parameters and photosynthetically active radiation (PAR) by conducting field experiments using different shading and plant density conditions and cultivars in 2019 and 2020 in Xinjiang, China. The results showed that with every 100 MJ m−2 increase in PAR, the average grain filling rate (Gave), maximum grain-filling rate (Gmax), and the kernel weight at the time of maximum grain-filling rate (Wmax) increased by 0.073 mg kernel−1 day−1, 0.23 mg kernel−1 day−1, and 0.24 mg kernel−1, and the time of maximum grain-filling rate (Tmax) delayed by 0.91 day. Relative changes in PAR were significantly and positively correlated with relative changes in yield and Gave. With every 1% change in PAR, yield and Gave changed by 1.16 and 0.17%, respectively. From the perspective of grain filling capacity, DH618 was a more shade-resistant cultivar than XY335 and ZD958. It is urgent to breed maize cultivars with low light tolerance and high grain yield in the face of climate change, particularly the decrease in solar radiation.

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Climate warming outweighed agricultural managements in affecting wheat phenology across China during 1981–2018

Cited by 34 publications

References 48 publications

Agronomic Improvements, Not Climate, Underpin Recent Rice Yield Gains in Changing Environments

Agronomic Improvements, Not Climate, Underpin Recent Rice Yield Gains in Changing Environments

Temporal Variation in Tower-Based Solar-Induced Chlorophyll Fluorescence and Its Environmental Response in a Chinese Cork Oak Plantation

Quantitative Relationship Between Solar Radiation and Grain Filling Parameters of Maize

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