Physiological Effect Of A New FA Antitranspirant On Triticum And Maize

The physiological effect of new FA antitranspirant on triticum and maize was studied under field trial. The new FA antitranspirant was sprayed on triticum at ear filling stage, and sprayed on maize at 10 days before tasseling (A), ear filling stage (B) and 10 days before tasseling + ear filling stage (C), using the following concentrations: 0.5ml/l, 1.0 ml/1, 1.5 ml/1 and 2.0 ml/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, thus stimulated growth and reduced water loss. The results on maize indicated that treatment (C) had a cumulative effect compared with treatment (A) and (B), except of NRA. The optimal concentration is 1.5mJ/l, i.e. 75g new antitranspirant dissolved hi 50kg water, and the optimal apply period is 10 days before tasseling + ear filling stage (C). The effective duration of new FA antitranspirant is about 2 to 3 weeks, hinges on the ponditions of the field. Weight per 1,000 gram of trticum increased 7.20% and yield per ha. of maize increased 29.58% in treatment (C), under the optimum concentration 1.5ml/l. Yield increase of all treatments were highly statistical significant at a level of a =0.01, that is to say yield increase effect of the new FA antitranspirant was perfect. Water use efficiency of maize increased 17.74% under appropriate application concentrations, while total water consumption changed very tittle.