| 摘要: |
| 采用自然湿地人工模拟的方法，研究了不同水分状态下三江平原沼泽湿地漂筏苔草（Carexpseu-docuraica）无性株地上茎粗和节间长度的变化。结果表明，漂筏苔草地上茎的茎粗随着土壤含水量和淹水深度的增加而增大，在5～9月份，不同水分状态下漂筏苔草茎粗的增幅为干旱状态（S1和S2）〈浅水状态（S3，S4和S5）〈深水状态（S6）；同株漂筏苔草地上茎粗变化为茎基部1～3节变化较大，中部较稳定一致，靠近生长点的1～3节又变细；一般茎基部1～2个节间（S6除外）和靠近顶端生长点1～2个节间较短，多数水分状态下从第3节以后的中部茎节间较长，且随着土壤含水量的增加和水位的加深而加长，其规律为S1＜S4＜S5＜S6（S6倒1节除外）。 |
| 关键词: 三江平原 漂筏苔草 水分状态 地上茎 茎粗 节长 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院知识创新工程项目(KZCX3-SW-NA-01) |
|
| Variation law of stem diameter and internode length aboveground of Carex pseudocuraica ramets under different water content |
|
|
| Abstract: |
| The variation of stem diameter and internode length of Carex pseudocuraica ramets in Sanjiang Plain under different water condition(Drought:S1& S2;Shallow Water:S3,S4&S5;Deep Water:S6) were studied with the method of artificial simulation in natural wetland.The results showed that the increment amplitude of stem diameter behaved as S1&S23,S4&S56.Of the same ramet,the stem diameter varied in the stem base,kept uniform in the central section,and became thin in the 1st-3rd node near the growing point.The internonde length of central section after the 3rd node from the base,which increased with soil water content and water depth(S1＜S4＜S5＜S6,except the last node of S6),was longer than 1st-2nd internodes of both stem base(except S6) and top. |
| Key words: Carex pseudocuraica stem aboveground stem diameter internode length water content Sanjiang Plain |
