Responses of the Key Phenological Characteristics and Carbon Flux of Winter Wheat to Climatic Time-Lag Effects and Crop Management on the North China Plain

IF 2.1 3区 农林科学 Q2 AGRONOMY International Journal of Plant Production Pub Date : 2024-03-19 DOI:10.1007/s42106-024-00292-5
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Abstract

Evaluation of the net ecosystem exchange (NEE) of agroecosystems may help to assess regional carbon cycles and ensure carbon neutrality. However, farmland NEE is influenced by climate change, phenological period, and crop management. Therefore, in this study, we investigated the time-lag effects of climate change on the phenology and NEE of winter wheat, as well as the influence of crop management. We found that the impact of climate change on the phenology of winter wheat exhibits a time lag of 1 to 2 months, with notable spatial and temporal heterogeneity. When accounting for time-lag effects, the correlation between climate change and both phenology and NEE significantly strengthens, with the lagged impact on NEE primarily mediated through changes in phenology. Specifically, climate change accelerates the green-up and heading dates but delays the maturity date, while crop management extends the phenological period. Our findings indicated that during the green-up stage, NEE is mainly influenced by temperature changes resulting from climate change. During the heading stage, it is predominantly affected by crop management, and during the maturity stage, it is impacted by both factors, with crop management having a more significant effect. Overall, the accelerated green-up stage and delayed heading and maturity stages contribute to enhanced carbon sequestration. This research provides new insights into carbon exchanges in agricultural ecosystems.

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华北平原冬小麦主要物候特征和碳通量对气候时滞效应和作物管理的响应
摘要 评估农业生态系统的净生态系统交换(NEE)有助于评估区域碳循环并确保碳中和。然而,农田净生态系统交换受气候变化、物候期和作物管理的影响。因此,在本研究中,我们调查了气候变化对冬小麦物候和净能效的时滞效应以及作物管理的影响。我们发现,气候变化对冬小麦物候的影响表现出 1 到 2 个月的时滞,并具有明显的时空异质性。当考虑时滞效应时,气候变化与物候和净能效之间的相关性明显增强,对净能效的滞后影响主要通过物候变化来介导。具体而言,气候变化加快了返青期和抽穗期,但推迟了成熟期,而作物管理则延长了物候期。我们的研究结果表明,在返青期,净能源效率主要受到气候变化导致的温度变化的影响。而在成熟期,则受到这两个因素的影响,其中作物管理的影响更为显著。总体而言,加速返青期、延迟打顶期和成熟期有助于加强碳固存。这项研究为农业生态系统的碳交换提供了新的见解。
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来源期刊
CiteScore
5.30
自引率
4.00%
发文量
46
审稿时长
6 months
期刊介绍: IJPP publishes original research papers and review papers related to physiology, ecology and production of field crops and forages at field, farm and landscape level. Preferred topics are: (1) yield gap in cropping systems: estimation, causes and closing measures, (2) ecological intensification of plant production, (3) improvement of water and nutrients management in plant production systems, (4) environmental impact of plant production, (5) climate change and plant production, and (6) responses of plant communities to extreme weather conditions. Please note that IJPP does not publish papers with a background in genetics and plant breeding, plant molecular biology, plant biotechnology, as well as soil science, meteorology, product process and post-harvest management unless they are strongly related to plant production under field conditions. Papers based on limited data or of local importance, and results from routine experiments will not normally be considered for publication. Field experiments should include at least two years and/or two environments. Papers on plants other than field crops and forages, and papers based on controlled-environment experiments will not be considered.
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