华北农学报2016，Vol.31Issue(5)：210-215,6.DOI:10.7668/hbnxb.2016.05.032
滴灌施肥条件下甘薯钾肥分期施用的研究
The Research of Potassium Application on Sweet Potato in Integration of Water and Fertilizer Conditions
摘要
Abstract
In order to clarify potash best installment application period of sweet potato.To study the effect of yield formation,potassium uptake and the influence of soil nutrient change after harvest on different installments K and period of sweet potato.And eight treatments were carried out:CK(No potassium fertilizer),K1 (Whole potassi-um basal applied),K2(Half potassium fertilizer as basal and half as top dressing at 75,1 00,1 20 d after transplant) and K3(Whole potassium fertilizer top dressed at 75,1 00,1 20 d after transplant)at the year of 201 3 -201 4.The results showed that compared with CK,different ways of K application could significantly improve the biomass,nitro-gen and potassium accumulation in and yield of sweet potato.From the point of different K ways and period,com-pared with the basal application of potash,75 d or 1 00 d stage K (1 /2 +1 /2 Top dressing)could significantly in-crease sweet potato 1 00 -1 60 d biomass,N and K accumulation,N and K use efficiency,201 3 yield increased by 1 3.8%,1 3.5%,201 4 yield increased by 1 9.1 %,1 8.6%.201 3 potassium production efficiency increased by 1 1 .3%,1 1 .5%,201 4 potassium production efficiency increased by 1 8.6%,1 9.0% respectively;201 3 potassium efficiency increased by 6.2,6.3 percentage points,201 4 potassium efficiency increased by 9.4,9.6 percentage points;201 3 potassium apparent use efficiency increased by 8.2,6.2 percentage points,201 4 potassium apparent use efficiency increased by 9.1 ,7.7 percentage points;under the way of conditions of sweet potato,K basal applica-tion should use half potassium fertilizer as basal and half as top dressing,and K application period of 75 -1 00 d af- <br> ter transplanting is advisable.关键词
甘薯/施钾时期/钾肥利用Key words
Sweet potato/Postponing potassium fertilizer/Potassium absorption分类
农业科技引用本文复制引用
汪顺义,刘庆,史衍玺,李欢..滴灌施肥条件下甘薯钾肥分期施用的研究[J].华北农学报,2016,31(5):210-215,6.基金项目
青岛市青年专项基金项目（14-2-4-117-jch）；现代农业产业技术体系建设专项资金项目 （）
