| In order to know the spatiotemporal variation and its regularities of water requirement and sown area of sugarcane in Guangxi province, the methods of time series, spatial distribution, crop coefficients approach and the center of gravity were used in the article, and chose meteorological and sown area data of Guangxi in 1968-2009, 42 years in total.The results showed that, water requirement of sugarcane kept rising through 42 years, reached to 16 billion cubic meters.Water requirement variation coefficients varied from 1.2 to 2, and sown area variation coefficients varie from 1.2 to 1.8.The center of gravity of sown area and water requirement located at the south of geometric center, for a distance about 73 kilometers, interspersing among LaiBin, Wuming, Binyang, Nanning cities and countries, of which, the center of gravity of sown area migrated 8 kilometers per year to southward and southwestward. However, the water requirement was 5.7kilometers per year to southward and westward. They both located at Binyang in 2009. Water requirement of sugarcane has reached 10.74 percent of water resource in 2009, and its sown area to 23.92 percent of agricultural acreage. The next step,sown area of sugarcane should be controlled, industrial distribution should be optimized, the utilization of water resources should be allocated more reasonable. |
