| 摘要: |
| 为探讨钾营养水平对大花蕙兰生长的影响，以红花品种‘R-01’小苗（组培苗出瓶3个月）为试验材料，红松树皮为基质栽培，进行不同钾浓度营养液施肥处理。结果表明，100 mg/L钾浓度对叶片长度有促进作用，且随着钾浓度增加，根系生长量显著增加而地上部分生长量反而下降。当钾浓度高于100 mg/L时，叶片叶绿素水平降低。钾浓度的增加没有引起植物体内钾吸收量的显著增加；钾浓度100 mg/L时，氮吸收明显增大，根部钙吸收也明显增加；钾浓度50 mg/L时，叶片磷吸收量达到最大。本试验钾浓度对镁吸收没有显著影响。 |
| 关键词: 大花蕙兰 钾营养水平 生长 养分吸收 |
| DOI：10.11841/j.issn.1007-4333.2014.04.15 |
| 投稿时间：2013-11-08 |
| 基金项目:国家“十二五”科技支撑项目（2011BAD12B02） |
|
| Effects of potassium levels on growth and nutrient absorption of Cymbidium seedlings |
|
LUAN Tian, YANG Xiu-zhen, LI Hui, SUN Yan, LIU Yan
|
| (College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China) |
| Abstract: |
| In order to study the effects of different K levels on the growth of Cymbidium hybridum,red flower species of Cymbidium ‘R-01’seedlings (tissue culture seedlings that were outside the bottle for 3 months) cultivated in red pine bark were chosen as material treated with different concentrations of K nutrient solution.The results indicated that K gradient of 100 mg/L contributed to the length of leaf;and with the increasing of the K application,the root developed significantly while the growth of the shoots decreased.Besides,the chlorophyll decreased when K concentration was over 100 mg/L.However,the increasing of K concentration didn't have a dramatic effect on the K absorption amount.In addition,when the K gradient was above 100 mg/L,both the N absorption and the Ca absorption in the roots were significantly increased.Moreover,when the K gradient was 50 mg/L,the N absorption in the leaf reached the maximum.In this experiment,the concentration of K had no significant effect on the absorption of Mg. |
| Key words: Cymbidium potassium levels growth nutrient absorption |
