施氮量和氮肥运筹模式对甘蔗前期生长的影响  

Effects of Different Time and Quantity of Nitrogen Fertilizer Application on Sugarcane Growth at Early Growth Stage

作　　者：徐媛[1] 莫建文[1] 吴少维 陈超君[1,2] 

机构地区：[1]广西大学农学院,南宁530005 [2]广西大学甘蔗研究所,南宁530005

出　　处：《中国糖料》2011年第1期20-22,24,共4页Sugar Crops of China

基　　金：国家科技支撑计划项目(2007BAD30B01);广西科技攻关计划项目(桂科攻0782004-1)

摘　　要：以甘蔗品种ROC25、ROC22和台糖98/0432为供试材料,采取桶栽方法,通过对萌芽率、分蘖率和生长前期的株高及干物质积累量的调查,探讨不同施氮量和不同氮肥运筹模式对甘蔗前期生长的影响。结果表明:不同的甘蔗基因型对氮肥的敏感程度不一样,特早熟品种ROC25在施N 225 kg/hm2条件下分蘖率和干物质的积累量最高,施N 150kg/hm2时6—7月份的株高最高;中熟品种ROC22在施N 225kg/hm2的条件下前期各项农艺指标均为最优;中晚熟品种台糖98/0432施N 150 kg/hm2最有利于分蘖,施N 225kg/hm2条件下6—7月份的株高最高;1次施肥不利于甘蔗的萌芽和分蘖,但可促进甘蔗前期有机物的生成;2次施肥能促进甘蔗分蘖;3次施肥对甘蔗中后期的快速生长有重要的作用。In order to study the effects of different quantity and time of nitrogen fertilizer application on sugarcane growth at early growth stage,varieties of ROC25,ROC22 and TT98/0432 were conducted to measure agronomic traits and dry matter accumulation pot experiments.The results indicated that： different sugarcane varieties were different in sensitive degree to nitrogen,the tillering rate and dry matter accumulation.Early maturity variety ROC25 were maximal under the nitrogen application level of 225 kg/ha,and the plant height was the highest under the nitrogen application level of 150 kg/ha.The comprehensive growth performance at early growth stage of medium maturing variety ROC22 showed the best under the nitrogen application level of 225 kg/ha.It was the most beneficial to tiller for late maturing variety TT98/0432 under the nitrogen application level of 150 kg/ha,and the plant height was the highest under the nitrogen application level of 225 kg/ha.To fertilize one time did not favor the germinating and tillering,but it could promote the formation of organic matter at early growth stage;to fertilize two time could promote tillering of sugarcane;to fertilize three time was beneficial to growth of sugarcane at middle or later stage.

关 键 词：甘蔗 施氮量 氮肥运筹模式 农艺性状 干物质积累 

分 类 号：S566.1[农业科学—作物学]