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- Title
ASSESSING THE IMPACTS OF CLIMATIC AND TELECONNECTION FACTORS ON MAIZE (ZEA MAYS L.) YIELD FROM BOTH MACROSCOPIC AND MICROSCOPIC PERSPECTIVES.
- Authors
LI, P.; HUANG, S. Z.; HUANG, Q.
- Abstract
Maize (Zea mays L) as an important crop in the world is strongly affected by climatic and teleconnection factors, it is therefore necessary to fully assess their impacts on maize yield. Given the complexity and non-stationarity of the maize yield fluctuations in China, the empirical mode decomposition (EMD) and cross-wavelet methods were adopted to explore the correlations between maize yield including its whole series and various frequency series decomposed by the EMD and climatic and teleconnection factors from both macroscopic and microscopic perspectives. Results indicated that: (1) from the macroscopic perspective, sunspots were the main influencing factor of maize yield; (2) from the microscopic perspective, mainly precipitation, temperature, El Niño-Southern Oscillation (ENSO), Atlantic Oscillation (AO), and Pacific Decadal Oscillation (PDO) impact the high-medium frequency components (i.e., the frequency domain is 1~4 years and 6~10 years) of the detrended maize yield sequence, whilst solar activities (i.e., sunspots) primarily influence its low-medium frequency components (i.e., the frequency domain is 8~14 years); (3) three complete influencing hierarchical frameworks of sunspots-teleconnection factors-climatic factors on the various frequency components of the detrended maize yield were constructed, which help develop a physical significance of maize yield prediction model The study provides new insights into crop yield forecasting, thereby laying a solid scientific basis for crop yield decisions.
- Subjects
CHINA; HILBERT-Huang transform; CORN yields; SOLAR activity; CROP yields; AGRICULTURAL forecasts; SUNSPOTS
- Publication
Applied Ecology & Environmental Research, 2020, Vol 18, Issue 2, p3250
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1802_32513275