断夜处理天数对延迟甘蔗开花的影响  

Effects of Night-break Duration on the Delay of Flowering in Sugarcane

作　　者：张垂明[1] 符城[1] 刘少谋[1] 杨业后[1] 吴其卫[1] 陈勇生[1] 邓海华[1] 

机构地区：[1]广州甘蔗糖业研究所广东省甘蔗改良与生物炼制重点实验室,广州510316

出　　处：《甘蔗糖业》2007年第4期1-6,24,共7页Sugarcane and Canesugar

基　　金：广东省科技计划项目(2006B60101039);农业部"948"项目(2006G37)。

摘　　要：对早花甘蔗亲本进行同一光照强度不同持续天数的断夜处理,研究断夜天数对甘蔗开花的影响和不同品系对断夜天数反应的差异。参试品种在8月下旬至9月中旬间断夜15天和26天处理的开花高峰期分别比自然光照处理的延迟20天和30天左右,增加断夜天数对推迟甘蔗始花期和降低抽穗率有明显的影响,但不同品系对断夜天数的反应,特别是在开花持续期和终花期方面,存在较大的差异。在实际应用中,宜根据不同品系的特性确定适宜的断夜处理天数。Early-flowering parents of sugarcane were subjected to different night-break duration under the same light intensity to study the effects of night-break on the delay of flowering and the response of parental clones to night breaks. The maximum flowering percentage of the treated plants for the treatments of 15 and 26 night breaks during late-August and mid-September occurred about 20 days and 30 days later than that of natural photo-periodic treatment, respectively. Prolonged night-break duration resulted in later inflorescence emergence and lower flowering plant percentage significantly. Differences in response to night-break duration appeared among the parental clones, especially in the extent of flowering and the date of last flower emergence for each treated clone. For the practical application of the method, it should be considered to determine the proper night-break duration for the parental clones according to their sensitivity to the treatment.

关 键 词：甘蔗 早花亲本 断夜处理 延迟开花 

分 类 号：S823.91[农业科学—畜牧学]