| 曲东,周莉娜,王保莉,邵丽丽,刘硕.硫营养对小麦苗期根系导水率的影响[J].干旱地区农业研究,2004,(1):40~43 |
| 硫营养对小麦苗期根系导水率的影响 |
| Effects of sulfur nutrition on hydraulic conductance of wheat root |
| |
| DOI：10.7606/j.issn.1000-7601.2004.01.08 |
| 中文关键词: 硫营养 水分胁迫 根系导水率 小麦 |
| 英文关键词:sulfur nutrient water stress root hydraulic conductance wheat seedling |
| 基金项目:黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-121) |
|
| 摘要点击次数: 39 |
| 全文下载次数: 20 |
| 中文摘要: |
| 以小偃503号小麦为试材,通过室内水培、盆栽试验,比较了干旱及硫胁迫情况下小麦苗期根系导水率的变化。其中水培以PEG6000模拟干旱胁迫,1/2强度Hoagland全营养液和1/2强度Hoagland无硫营养液控制硫素水平;盆栽采用重量法控制水分。结果表明:无论在正常供水还是干旱胁迫时,供硫处理的根系导水率始终高于无硫处理,硫营养显示出对根系导水率的调节能力。旱后复水过程中,供硫处理的导水率较无硫处理有显著的增加,供硫处理显示出较强的恢复能力。水培和盆栽试验的结果均证实了硫营养对小麦根系导水率有明显的调节作用。 |
| 英文摘要: |
| The relations between sulfur nutrition and root hydraulic conductance (Lpr) were studied in wheat (Xiaoyan No.503) seedling period. The experiment was each done in Hoagland solution and pot test culture indoors. The PEG 6000 was used to simulate drought stress (-0.3 Mpa). Sulfur level was controlled with 1/2 strength Hoagland nutrition solution and 1/2 strength Non-sulfur Hoagland nutrition solution. The soil moisture content in pot test was controlled through weighing every day. The sulfur level was controlled through adding sulfur or not. In different water restoring time, the root hydraulic conductance was measured. The variety of root hydraulic conductance was compared in wheat seedling under water stress and sulfur nutrition stress conditions. The results indicated: During normal condition or drought stress, the wheat root hydraulic conductance of treatment with sulfur supply is higher than that in absent. After restoring water, the wheat root hydraulic conductance recovery ability of plant with sulfur supply is better than that in absent. It is demonstrated that in Hoagland and pot culture plant with sulfur supply had better recovery ability, and sulfur nutrition had obvious adjust effect on Lpr. in wheat root. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |