磷肥对蓖麻不同生育期光合特性的影响  

Effect of phosphorus fertilizer on photosynthesis characteristics of castor at different growth stage

作　　者：周丽娟[1] 牟金明[1] 郑永照[1] 王春龙[1] 谢志明[2] 王晓磊[1] 

机构地区：[1]吉林农业大学农学院,吉林长春1301181 [2]白城师范学院生物系,吉林白城137000

出　　处：《中国油料作物学报》2010年第3期408-412,共5页Chinese Journal of Oil Crop Sciences

摘　　要：采用大田随机区组试验设计,以哲蓖5号为试材,研究了不同磷素水平（P2O5：0kg/hm2、23kg/hm2、46kg/hm2、69 kg/hm2、92kg/hm2、115kg/hm2、138kg/hm2）对蓖麻植株不同生育期的光合特性影响。结果表明：施肥量在一定限度内,蓖麻群体的主要光合性状与磷肥施用量呈正比;超过某一限度后呈反比。当磷素施用量为46~92kg/hm2时,各光合性状值均较高,蓖麻的主要光合性状在花果后期-灌浆成熟期受磷肥影响较大。适宜的磷素可以在一定程度上增强蓖麻光合能力,进而达到增产的目的。The experiment was conducted with the random-blocks design in field,Zhebi 5 was used as materials for studying the photosynthesis of castor in different growth stage with seven P fertilizer levels（P2O5：0kg/hm2、23kg/hm2、46kg/hm2、69kg/hm2、92kg/hm2、115kg/hm2、138kg/hm2）.The result showed that P application under certain level could accelerate the major photosynthetic characteristics,but would reduce the photosynthesis when application exceeded that level.When P2O5 application amount was at 46～92kg/hm2,the major photosynthetic characteristics were on the highest level.Between the later flowering and fruit stage to grain-filling and maturity stage,P had great effect on the major photosynthetic characteristics.It indicated that rational P application could increase castor photosynthesis and further increase the yield as the end result.

关 键 词：磷肥 蓖麻 生育期 光合特性 产量 

分 类 号：S143.2[农业科学—肥料学] S565.6[农业科学—农业基础科学]