The Effect of Water Consuming Law and Water Stresson Growth , Development and Yield of Summer Maize

Based on the data from irrigation experiment, the water consuming law,changing patterns of plant transpiration and interrow evaporation during summer maize growth were studied and the effect of water stress on the growth,development and yield formation also analyzed. It has been shown that the water consumption of summer maize for the suitable water treatment was 425.25mm, the water consumption at each period took up 14.3%,10.49%,10.43%,15.70%,27.16%,13.63% and 8.25% of seasonal water consumpion respectively, and average water consumption per day at the corresponding period were 4.064, 2.973, 2.958, 4.452, 7.699, and 2.192mm separately. The interrow evaporation of maize field was relatively high and accoumted for 3538% of seasonal water consumption. The water sterss at various growing stages led to a seasonal water consumption.The water stress at various growing stages led to a series of harmful consequences, especially, eater shortage at 40 days around the tussling stage caused the most harmful effect,next was the water shortage at the jointing stage.