关键词: 生育阶段, 降水量, 甘蔗需水量, 干旱, 柳州市

Abstract: ： The meteorological data of 8 meteorological stations in Liuzhou were collected. In consideration of sugarcane crop coefficient the water requirement of sugarcane were calculated by Penman formula. Then, the water supply and demand of sugarcane in Liuzhou was analyzed in combination with precipitation in the growing season. The results showed that sugarcane was in water surplus in the seedling stage and the tillering stage, while the water deficit occurred mainly in the extended and mature stage, which was the most significant in the later period of extended stage. The precipitation center in the growing season of sugarcane was mainly concentrated in the area of Rongan and Rongshui in Liuzhou. Precipitation was less while the water requirement was larger in the south of study area. The south of study area was the main district of water deficit which took a high drought risk. The results can provide a scientific basis for the relevant departments in formulating drought prevention and mitigation measures for sugarcane.

Key words: growing stage, precipitation, water requirement of sugarcane, drought, Liuzhou city