马铃薯不同生育期追施钾肥效果的研究  

Effect of Additional Fertilization with Potassium Fertilizer on Different Growth Periods

作　　者：夏更寿[1] 郭志平[1] 

机构地区：[1]丽水学院,丽水323000

出　　处：《上海交通大学学报（农业科学版）》2007年第4期392-394,398,共4页Journal of Shanghai Jiaotong University(Agricultural Science)

基　　金：浙江省丽水市科技计划项目(2004305-2)

摘　　要：在浙江省马铃薯主产区丽水市,以中薯3号马铃薯为材料,通过2年试验研究了不同生育期追施钾肥对马铃薯产量及相关性状的影响。试验表明:以不追施钾肥为对照,分别在苗期、块茎形成期和块茎膨大期追施钾肥均提高了马铃薯产量、块茎淀粉含量、干物质量和商品率,提高了净同化率、叶绿素含量和叶面积系数。不同处理的效果不同,以块茎形成期追施钾肥效果最显著,较对照增产43.48%,块茎淀粉含量、干物质量和大中薯率分别较对照提高15.46%、10.02%和21%;块茎形成期追施钾肥叶面积系数、叶绿素量和净同化率分别较对照提高16.89%、18.24%和23.83%。After two years＇ experiments in Lishui, the main potato producing area in Zhejiang, the effects of additional fertilization with potassium fertilizer for potato ＂Zhong Shu No.3＂ on its production and related traits are examined. The result of the tests indicates that the potato production, the starch content, solids content and the commodity rate can be improved as well as net assimilation rate; chlorophyll content and leaf area index can be increased by additional fertilization with potassium feailizer during seedling, tuberization and tuber expansion period. In the meanwhile, the result of the tests shows that different disposal methods of potassium fertilizer lead to different effects. And the effect of additional fertilization with potassium feailizer during tuberization period is of the most markedness. Its products increased by 43.48% comparing with fertilization with the normal potassium fertilizer, the starch content, solids content and the rates of big potatoes and medium potatoes increased by 15.46%, 10.02% and 21% respectively. The leaf area index, chlorophyll content and net assimilation rate increased by 16.89,18.24 and 23.83.

关 键 词：马铃薯 不同生育期 追施钾肥 

分 类 号：S532[农业科学—作物学]