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《Northern Horticulture》 2015-06
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Effect of Different pH Regulation on the Growth and Quality of Cut Flower of Oncidium

ZHENG Yan;ZUO Yu;BAI Ting-yu;WANG Yi-Rong;LIN Dian;College of Agriculture,Hainan University;  
In order to investigate the effect of different pH cultivation on the mineral element content,vegetative growth and quality of cut flowers of oncidium which used Oncidium Gower Ramsey ‘Gold 3'as experimental materials,the experiment which adjust the oncidium substrate pH value with different saturation levels of calcium oxide solution was done.The results showed that,with the increase of cultivation pH value,the number of microorganisms in the substate increased first,then trend to decrease,and the amount level of fungi was the highest when the pH value was 5—6,the bacteria and actinomycetes was the highest when the pH value was 6—7;the mineral element content changed significantly in leaves and pseudobulb of oncidium,after adjusting the oncidium cultivation pH value with different saturation levels of calcium oxide solution,the content of calcium(Ca)increased with pH value,the content of magnesium(Mg)and phosphorus(P)decreased,potassium(K)content decreased firstly and then increased,while the improvement of Ca in a certain range could improve the absorption of microelements of oncidium;when the pH value in the range of5—6,the leaves and pseudobulbs got the highest relative growth rate,and the quality of cut flowers were also significantly higher than other treatment,such as the length of cut,branch number,flower number.
【Fund】: 海南省政府重点资助项目(ZDXM20120512);; 海南大学中西部计划-学科重点领域建设资助项目(ZXBJH-XK003)
【CateGory Index】: S682.31
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