不同氮肥运筹对丘陵地区春播马铃薯产量及氮素吸收利用的影响  

Effect of different nitrogen management strategies on nitrogen uptake, utilization and yield of spring potato in hilly regions

作　　者：雷武生[1] 王永平[1] 

机构地区：[1]江苏农林职业技术学院,江苏句容212400

出　　处：《广东农业科学》2013年第21期61-65,共5页Guangdong Agricultural Sciences

基　　金：江苏省科技支撑计划项目(BE2011349);镇江市科技支撑计划项目(NY2010023)

摘　　要：以一级种薯中薯3号为供试材料,设置不同氮肥运筹方式试验,研究不同氮肥运筹对春播马铃薯产量、叶面积、干物质积累以及氮素吸收和利用的影响。结果表明,春播马铃薯产量随氮素用量增加呈先增加后降低的趋势,氮素后移能够增加春播马铃薯的产量;马铃薯在各生育期的氮吸收量随氮素用量的增加而增加,氮素后移有利于马铃薯的氮素吸收积累,并且氮素用量与氮素利用率之间存在明显的负相关关系,氮素后移能够显著提高马铃薯的氮素利用率。In this research, the first-class seed potato variety ＂Zhongshu No.3＂ was applied as research material, different nitrogen management strategies were set, and the effects of different nitrogen management strategies on indexes inclucling yield, leaf area, dry matter accumulation and nitrogen uptake and utilization of spring potato were investigated. The results showed that with amounts of nitrogen application increasing, the yield of spring potato exhibited a tendency of first increased and then decreased, and postponing nitrogen application improved the yield of spring potato. Meanwhile, with amounts of nitrogen increasing during every growth phase, the amounts of nitrogen absorption enhanced, and postponing nitrogen application was beneficial for nitrogen absorption and accumulation of potato. The results also indicated that amount of nitrogen application was significantly negatively correlated with the efficiency of nitrogen utilization, and postponing nitrogen application significantly enhanced nitrogen utilization efficiency of potato.

关 键 词：氮素运筹 马铃薯 产量 氮素吸收 

分 类 号：S143.1[农业科学—肥料学]