营养与株型调控对雾培马铃薯的结薯生理影响

Media formula and plant control effects on aeroponics potato tuberization physiology

本研究采用3套营养液配方与3种株型调控措施探讨了不同马铃薯(Solanum tuberosumL.)品种的结薯生理效应。结果表明:不同营养液配方对雾培马铃薯的“源流库”皆存在一定的影响;采用以前期最小、结薯期最大的N/K和NH4+-N/NO3--N比值的A2营养液,对植株的光合势、叶绿素含量、根系活力、匍匐茎数、总薯数、总薯重以及后期末茎叶鲜重与干重等的增长刺激作用最大,其中又以“CIP24”品种的结薯性能最好;下放植株、喷施矮壮素和剪尖处理的不同组合均能使“CIP24”品种在A2营养液下增加光合势,降低株高,增加鲜重和增大根系体积。

Three different nutrition solutions and 3 plant-controlling methods were designed to study physiological effects on tuberization of potato （Solanum tuberosum L. ）. The results indicate that nutrition formula has significant effects on the ‘source-current-sink＇ of potato. Applications of nutrition solution A2 at minimum ratios and maximan ratios of N/K and NH4^＋ -N/NO3^--N in the early and late growth stages, respectively, can greatly increase plant leaf area, LAD, content of chlorophyll, root activity and number of stolon shoot, mlni-tuber number and weight, fresh and dry weights of stem and leaf. CIP24 is found to have the best tuberizing property. Further more, different combinations of plant-controlling, CCC spraying and pruning can increase LAD, shoot fresh weight and root volume, shorten plant height when CTP24 is cultured with A2.