Analysis of Annual Climate Types and Its Impact on Summer Maize in the North China Plain over the Period 1961-2015

doi:10.3969/j.issn.1000-6362.2019.02.001

Abstract

Abstract:

Based on the 1961-2015 ground surface data from 55 meteorological stations in the summer maize plating area of the North China Plain, annual climate types and its impact on potential summer maize yield were analyzed. Ten annual climate types were determined by calculating the abnormality of mean temperature, precipitation and solar radiation in summer maize growing season. In the past 55 years, the drought year showed the greatest frequencies with the average value of 15.8, followed by the rainy year and the cloudy year, and the least frequencies were the warm and rainy year, as well as the high temperature year. The drought year and the wet year both most occurred in the middle east of Hebei and the middle east of Shandong, and the warm and dry year was mainly found in the northern North China Plain. The cloudy year showed least variations among different regions. Both the normal year and the rainy year showed significant decreasing trends, while significant increasing trends were found for the frequencies of the warm and dry year, the warm and wet year, the high temperature year, and the cloudy year (P<0.05）. Precipitation and solar radiation are the main limiting factors for the potential yield of summer maize in the North China Plain. Compared with the normal year, the potential maize yield in the less rainy year (including the drought year, the warm and dry year and the cold and dry year） reduced by more than 15%, and the warm and dry year type had the greatest influence on the potential yield. The cloudy year showed 12.5% lower potential maize yield than the normal year, and significant differences were found among regions.

Key words: North China Plain, Annual climate type, Summer maize, Potential yield

MA Xue-qing, HU Qi, PAN Xue-biao, WANG Jing, HU Li-ting, LI E, HUANG Bin-xiang, . Analysis of Annual Climate Types and Its Impact on Summer Maize in the North China Plain over the Period 1961-2015[J]. Chinese Journal of Agrometeorology, 2019, 40(02): 65-75.

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