| 摘要: |
| 本试验就我国目前用于抗小麦干热风的几种化学药剂对蚕豆气孔开张度和小麦蒸腾失水的影响作了测定。结果表明,亚硫酸氢钠、石油助长剂、腐质酸、二氯化钙、水杨酸、8—羟基喹啉等,对蚕豆气孔的开张有不同程度的抑制作用,使小麦叶片的蒸腾强度和相对失水率明显下降。磷酸二氢钾有促进气孔开张的作用,使蒸腾强度和相对失水率相应增大。浓度试验表明,0.5×10-2M 的亚硫酸氮钠和二氯化钙,200ppm 的腐质酸,可使蒸腾降低50%以上,气孔开张度缩小60%左右。考虑到上述三种药剂对人畜无毒,且价钱便宜,值得进一步作大田应用试验。 |
| 关键词: |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Effects of Several Anti-Evapotranspiration Agents Upon the Opening of Stomates of Plants and Water Loss by Evaptranspiration |
|
|
| Abstract: |
| Effects of several chemical agents currently used in China against the dry and hot wind over wheat upon the opening of stomates of broad beans and water loss of wheat by evapotranspiration were determined in this test.Results obtained from it indicated that sodium hydrogensalfite, petroleum auxon, humic acid, calcium chloride,salicylic acid, 8-hydroxyquinline have some inhibiting effects upon the opening of stomates of broad beans to some extent so as to reduce evapotranspiration intensity and relative water loss rate of wheat leaves obviously. Potassium dihydrogen phosphate promoted the opening of stomates so as increase evaportranspiration intensity and relative water loss rate. Tests in concentration demonstrated that 0.5×10-2M of sodium hydrogeasulfite and calsium chloride as well as 200 ppm of humic acid canreduce over 50 percent of evapotranspiration with a contraction of 60 percent or so of the opening of stomates.As a result, the aboved mentioned three chemicals which have no poisonous effects upon human beings and animals , with low cost ,are worth using in the field tests. |
| Key words: |
