According to the climatic requirements of rice growth and development, four key climatic factors, including length of safe period for rice cropping, active accumulated temperature during the safe period, sunshine hours during the period when daily mean temperature above 10°C and annual mean temperature, were selected as the indices to classify agroclimatic zones for rice cropping in Guangxi. Climatic data during 1961 to 2010 and related geographical information data of 90 weather stations in Guangxi were used to establish spatial calculating models for the classification indices. The spatial calculating models for the safe period for rice cropping( Y＝1193.028-9.831 φ -0.086h-6.680 λ), the active accumulated temperature during the safe period (Y＝30166.74-262.656 φ -2.848 h -165.549 λ), the sunshine hours during the period when daily mean temperature above 10°C (Y=6665.195-110.344 φ -0.416 h -23416 λ), and the annual mean temperature (Y＝73.237-0.735 φ -0.005 h -0.314 λ) were obtained by using geographic infermation system (GIS) technology and stepwise regression method, and finegrid calculation and residual error correction were carried out for each classification index. Based on the identified classification rules, four agroclimatic zones, namely latematuring doublerice cropping zone, middle and latematuring doublerice cropping zone, early and middlematuring doublerice cropping zone, and single riceratoon rice cropping zone, were classified for rice cropping in Guangxi, and the map of agroclimatic zones for rice cropping in Guangxi was built.
HE Yan1, WANG Bin2, JIANG Ligeng2, MENG Cuili1, OU Zhaorong1, XU Shihong3,*
. Refined Climatic Division of Rice Planting Distribution Using GIS in Guangxi, China[J]. Chinese Journal OF Rice Science, 2013
, 27(6)
: 658
-664
.
DOI: 10.3969/j.issn.1001-7216.2013.06.014
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