施钾时期对甘薯植株性状及产量的影响  

Effects of Potassium Application Period on the Plant Traits and Yield of Sweet Potato

作　　者：姚海兰[1] 张立明[2] 史春余[1] 张超[1] 柳洪鹃[1] 张海峰[1] 

机构地区：[1]山东农业大学农学院作物生物学国家重点实验室,山东泰安271018 [2]山东省农业科学院,济南250100

出　　处：《西北农业学报》2010年第4期82-85,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：山东省自然科学基金(Y2007D14);国家甘薯产业技术体系资助

摘　　要：以鲁薯8号为材料,在相同施钾量的基础上,研究不同生育时期施钾对甘薯植株性状及产量的影响。结果表明,基施或封垄期追施钾肥有利于甘薯基部茎节发育和分枝、提高单薯质量和大薯比例,显著提高块根产量;其中,全部钾肥基施增产11.93%,1/2基施+1/2封垄期追施增产10.53%,全部钾肥在封垄期追施增产9.07%。高峰期追施钾肥可以提高后期叶绿素含量和中薯比例,但是产量增幅变小、干率下降。综合考虑钾肥产块根的效率、以及施肥的方便性,以全部钾肥基施为宜。Lushu No.8 was used to study the effects of potassium application period on the plant traits and yield of sweet potatoes.The results showed that applying potassium as basal dressing or top cover fertilizer promoted the basal stem growth and increased branch number,fresh weight,the percentage of big storage root,and storage root yield.Compared with the control,applying all potassium once as basal dressing increased the yield by 11.93%,half potassium as basal dressing and top cover fertilizer respectively,yield increased by 10.53%,and all potassium once as top cover fertilizer,yield increased by 9.07%.The results also showed that applying potassium as top-growth peak fertilizer increased the chlorophyll content during the later period and the percentage of medium sweet potatoes,but decreased the yield gain and dry-slice-yielding rate.Considering the potassium efficiency for the production of storage roots and convenience of fertilization in different treatments,applying potassium once as basal dressing was suitable.

关 键 词：甘薯 施钾时期 产量 

分 类 号：S531[农业科学—作物学]