| 摘要: |
| 在大田和盆栽条件下,研究了NaHSO3,CaCl2,三唑酮(Tria)和黄腐酸钠(FA)4种抗蒸腾剂对冬小麦抗旱能力的影响。结果表明,4种药剂都有抑制蒸腾、增加气孔阻力、提高叶水势的作用。Tria有明显促进植株根/苗比的效应。药剂处理还提高了水分胁迫下植株的净光合速率、干物质积累及籽实产量,在生产上有一定应用价值。试验确定,各种药剂的适宜施用浓度,NaHSO3和CaCl2为1.0×10-2mol/L,Tria和FA为300μg/g,有效期NaHSO3和CaCl2在8d左右,Tria和FA在9d以上。 |
| 关键词: 水分状况,净光合速率,抗蒸腾剂,冬小麦 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目 |
|
| Action Characteristics of Several Anti-transpirants and Their Effect on Drought Resistance to Winter Wheat |
|
Wang Yongji Ding Zhongrong Wang Shaotang
|
| Abstract: |
| The effects of several anti-transpirants (NaHSO3,CaCl2,triadimenfon
and fulvic sodium)were studied in the case of field and pot cultivation on drought resistance to winter wheat.The finding sindicate that all treatments of four chemicals have
the effects upon inhibiting transpiration and increasing stomatal resistance and raising
leaf water potential of plants.Triadimenfon treatment can increase the ratio of roots to
seedlings.The chemical treatments enhance the net photosynthesis of plants in water
stress,the accumulation of dry matter and improvement of grain yields,which is of
great importance in practical production.The pot tests also determined the optimum
concentration of the four chemicals.NaHSO3 and CaCl2 are 1.0 × 10-2 mol/L and triadimenfon and fulvic acid sodium are 300μg/g.The valid duration for NaHSO3 and CaCl2 is
about 8 days;and that for triadimenfon and fulvic acid sodium is over 9 days. |
| Key words: water status, net photosynthesis, antitranspirants, winter wheat |
