不同外源钙物质对蝴蝶兰栽培基质水苔EC值和pH值的影响.docVIP

不同外源钙物质对蝴蝶兰栽培基质水苔EC值和pH值的影响 　　摘要：以蝴蝶兰品种“大辣椒”为试材，研究了不同外源钙物质对蝴蝶兰栽培基质水苔EC、pH 值的影响。结果表明：浇灌清水的情况下EC 值随着时间的延长逐渐降低，由0.92 mS/cm 下降至0.56 mS/cm。正常肥水管理条件下的EC 值逐渐上升，由0.94 mS/cm 上升至1.30 mS/cm。而添加CaO能加剧基质EC 值的提升，并随着处理次数的增加，EC 值持续增高，第4次处理后测定数值达到1.35～1.38 mS/cm并趋于稳定。与正常肥水管理相比，添加CaCO3对基质的EC 值基本没有影响。随着处理时间的延长，对照组水苔的pH 值逐渐降低，浇灌清水的基质pH值由处理前的4.76降至4.57，正常肥水管理的pH 值下降趋势更为明显，由开始的4.81下降至最终的4.46。但添加外源钙物质能明显改变水苔pH 值。其中，200～600倍CaO对水苔pH 值的改善效果较为明显且效果较为接近，可使基质pH 值由4.74～4.77提高至4.88～4.91；添加CaCO3后，水苔的pH 值与对照相比均有提高，但随时间延长呈降低趋势。 　　关键词：钙源；蝴蝶兰；水苔；基质；理化性状 　　中图分类号：S682.31文献标识号：A文章编号：1001-4942（2017）11-0048-04 　　Effects of Different Calcium Sources on Values of 　　EC and pH of Sphagnum Moss as Phalaenopsis Medium 　　Guo Wenjiao1，Zhang Jingwei1， Sun Jixia1， Zhang Yingjie1， Wang Aiyi2， Chu Meijing1，3， Liu Xueqing1 　　（1. Yantai Agricultural Science and Technology Institute， Yantai 265500， China； 　　2. Longkou Environmental Protection Agency， Longkou 265701， China；3.Yantai University， Yantai 264005， China） 　　AbstractIn oder to analysis the effects of different calcium sources on the values of EC and pH of sphagnum moss which was used as Phalaenopsis medium， the variety of Phalaenopsis ‘big chili’ was selected as the research materials in this study. The results showed that the EC value of clear water treatment decreased gradually with the prolongation of time， which dropped to 0.56 mS/cm from 0.92 mS/cm， while the EC value of normal management practices rose gradually， which rose to 1.30 mS/cm from 0.94 mS/cm. Adding CaO could intensify the EC value of the medium continuously with the treatment times increasing， which could reach to 1.35～1.38 mS/cm and showed a trend to be stable after the fourth time. While adding CaCO3 had no significant effects on the EC value compared with normal management treatment. The pH value of sphagnum moss in the control group decreased gradually with the prolongation of treatment time， and the pH value fell to 4.57 from 4.76 under the condition of clean water and came down