摘要
The field trial was conducted to study physiological effect of new FA antitranspirant on maize. The new FA antitranspirant was sprayed at 10 d pre-tasseling, ear filling stage and 10 d pre-tasseling + ear filling stage, with the concentrations of 0, 0.5, 1.0, 1.5 and 2.0 ml L-1. The results indicated that the application of 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 rate and reduced transpiration rate, stimulated growth and reduced water loss. 10 d pre-tasseling + ear filling stage application had a cumulative effect on the indices compared with 10 d pre-tasseling and ear filling stage, except for NRA. The new FA antitranspirant caused an increase of grain yield by 5.37 to 29. 58% with different treatments. The optimal concentration is 1. 5 ml L-1, i. e. 75 g new FA antitranspirant dissolved in 50 kg water, and the optimal apply period is 10 d pre-tasseling + ear filling stage.
The field trial was conducted to study physiological effect of new FA antitranspirant on maize. The new FA antitranspirant was sprayed at 10 d pre-tasseling, ear filling stage and 10 d pre-tasseling + ear filling stage, with the concentrations of 0, 0.5, 1.0, 1.5 and 2.0 ml L-1. The results indicated that the application of 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 rate and reduced transpiration rate, stimulated growth and reduced water loss. 10 d pre-tasseling + ear filling stage application had a cumulative effect on the indices compared with 10 d pre-tasseling and ear filling stage, except for NRA. The new FA antitranspirant caused an increase of grain yield by 5.37 to 29. 58% with different treatments. The optimal concentration is 1. 5 ml L-1, i. e. 75 g new FA antitranspirant dissolved in 50 kg water, and the optimal apply period is 10 d pre-tasseling + ear filling stage.
