水土保持学报2017，Vol.31Issue(6)：296-301,6.DOI:10.13870/j.cnki.stbcxb.2017.06.046
不同用量包膜氯化钾对马铃薯产量、品质及土壤钾供应的影响
Effects of Different Polymer-Coated Potassium Chloride Dosages on Potato Yield, Quality and Soil Potassium Supply
摘要
Abstract
A potato pot experiment was conducted to study the effects of different polymer-coated potassium chloride (PCK) dosages on potato yield,quality and soil potassium (K) supply,which set six treatments:no potassium,potassium chloride,30％ PCK,50％ PCK,70％ PCK and 100％ PCK dosage (with the potassium chloride dosage equivalent).The results showed that the K released by 1.2％ amount average of PCK in 25 ℃ water immersion,which met the controlled-release fertilizer industry standards.The K release rate was in "S" curve in the soil and reached the maximum value at 70～90 days,which was consistent with the potato potassium uptake in tuber formation and expansion period and beneficial to yield formation.The yields of potato were increased by 13.92％～36.54％ of different PCK dosages compared with potassium chloride.The potato Vc,total soluble protein and starch contents of 100％ PCK were significantly higher than that of potassium chloride,and the potato total reducing sugar content of 100％ PCK was significantly lower than other the treatments,the decrease showed to 13.9％～36.2％.The PCK released K slowly,which could meet the needs of potato K uptake at later period.After the tuber formation period,potato K uptake amount of above 50％ PCK dosage treatments were significantly higher than the other treatments.Compared with potassium chloride,the soil available K content of above 50％ PCK dosage was significantly higher after the tuber formation period.At the same time,the soil water soluble K and non-specifically adsorbed K contents were increased by 8.4％～25.1％ and 9.3％ ～36.1％ respectively,so the soil K supply adequately.In conclusion,above 50％ PCK dosage was beneficial to improve potato yield,commercial potato rate and quality,and increase soil K supply.关键词
马铃薯/包膜氯化钾/产量/品质/土壤钾素供应Key words
potato/potassium chloride coated by polymer/yield/quality/soil potassium supply分类
农业科技引用本文复制引用
郭新送,丁方军,陈士更,王焕喜..不同用量包膜氯化钾对马铃薯产量、品质及土壤钾供应的影响[J].水土保持学报,2017,31(6):296-301,6.基金项目
“十三五”国家重点研发计划项目“化学肥料和农药减施增效综合技术研发”(2016YFD0201143) （2016YFD0201143）
