灌浆期喷施新型FA抗蒸腾剂对冬小麦的生理调节作用研究

Physiological Effect of New FAAntitranspirant on Winter Wheat at Ear Filling Stage

在冬小麦灌浆期喷施新型FA 抗蒸腾剂,喷施浓度为0.5、1.0、1.5 和2.0 ml·L-1,研究其对冬小麦的生理调节作用。结果表明,喷施新型FA 抗蒸腾剂可以提高硝酸还原酶活性、游离脯氨酸含量、叶绿素含量和叶片含水量,有利于减轻干旱胁迫。新型FA 抗蒸腾剂可以提高光合速率、减小气孔开张度、降低蒸腾强度,起到促进冬小麦生长和减少水分散失的作用。灌浆期喷施新型FA 抗蒸腾剂对冬小麦具有增产作用,在1.5ml·L-1浓度下的增产效果最为理想,增产幅度为7.2%。

The physiological effect of new FA antitranspirant on winter wheat was studied in field trials. The new FA antitranspirant was sprayed at ear filling stage at the concentrations of 0.5, 1.0, 1.5 and 2.0 ml·L-1. The results indicated that new FA antitranspirant increased nitrate reductase activity (NRA), free proline content, chlorophyll content and water content of leaf, thus drought stress can be mitigated. The new FA antitranspirant increased photosynthesis, reduced stomatal opening status and transpiration rate, thus led to growth stimulation and water loss reduction. New FA antitranspirant resulted in an increase of grain yield by 7.2% at the optimal concentration of 1.5 ml·L-1.