甘蔗茎直径变化规律研究  

Variations of Sugarcane Stem Diameter

作　　者：陈海波[1,2] 李就好[3,2] 余长洪[3] 刘德灿 

机构地区：[1]华南农业大学工程学院,广州510642 [2]华南农业大学南方农业机械与装备关键技术教育部重点实验室,广州510642 [3]华南农业大学水利与土木工程学院,广州510642

出　　处：《灌溉排水学报》2014年第1期61-64,共4页Journal of Irrigation and Drainage

基　　金：广东省科技计划项目(2008B030303034)

摘　　要：从环境因子、生育期、种植季节、品种等方面,研究了甘蔗茎直径的变化规律。结果表明,不同天气影响下茎直径日最大收缩量差异显著,而茎直径日增长量差异不显著;4个生育期内,甘蔗茎开始收缩时间基本一致,开始恢复时间以苗期最早,伸长期最迟。日最大收缩量以伸长期最大,其次分别为分蘖期、成熟期和苗期。平均日增长量以伸长期最大,其次分别为分蘖期和苗期,成熟期基本停止生长。茎直径生长受气象因子和土壤水分的影响,气温低于8℃时,茎直径基本没有生长;与秋植甘蔗相比,春植甘蔗对水分胁迫的响应较快,且受水分胁迫的危害较大。粤糖96-86品种对水分胁迫较新台糖22号品种敏感,抗旱性能相对较差。Variations of sugarcane stem diameter were analyzed from environmental factors, growth stages, planting seasons and crop varieties. The results showed that there was obvious difference for the maximum daily shrinkage （MDS） while there was no obvious difference for daily increase （DI） in different weather conditions. In four growth stages of sugarcane, stem diameter almost began to shrink at the same time, but the stem diameter first began to recover in seedling stage and it was the last in elongation stage. MDS in elongation period was the biggest, followed by those in tillering , mature and seedling periods. The mean D I in elongation period was the biggest, followed by those in tillering and seedling periods, and stem diameter basically had no growth at mature stage. Stem diameter growth Was affected by meteorological factors and soil moisture, and stem diameter basically stopped growing when the temperature was below 8 ·C; The response to water stress for sugarcane planted in spring was faster and water stress did more harm to sugarcane planted in spring compared to sugarcane planted in autumn. Y96 - 86 was more sensitive to water stress than T22.

关 键 词：甘蔗 茎直径 生育期 水分胁迫 气象因子 

分 类 号：S566.1[农业科学—作物学] S161