Stains Waterlogging Stress Effects On Rice Growth And Yield Structure

the stains waterlogging stress is one of important abiotic stress in rice production, serious impact on rice growth and development, improve on the rice production played a tremendous role. To study flood water stress on rice growth and yield structure, the influence of rice waterlogged disaster for scientific prevention and control technology and the suggestion is put forward, in this study,2013, adopt the method of simulation test, simulation of rice at tillering, booting stage, heading stage and milk stage flood, flooded every growth period of rice processing is analyzed emphatically influence on plant height and yield, and through experiment data statistics, analysis and summary of the following conclusions:(1) with the increase of submergence depth and flooded time extend ceaselessly, rice growth period will appear different degree of delay or an early end wait for a phenomenon, serious impact on rice growth and development. (2) whether early or late rice in different growth period, the flooding time and depth, that there are obvious differences between the height of the rice plant. The depth of the flooded flooded the deeper, the longer the time, the greater the height change of rice plant, but it is the resistance of each variety flooded, once exceed this limit, will hinder the growth of crops, lead to grow at a slower pace, serious when even crops in death; (3) early rice after flood water treatment appeared more obvious phenomenon of tillering, and longer duration of flooding and the deepening of submergence depth, high tillering phenomenon is more obvious. Due to a shortage of oxygen for flood water treatment caused crop root, loses its original vitality, black root number increased, shirane proportion is relatively small. The adverse changes of rice root growth played a inhibitory effect of tillering, lead to new tillering stem main stem appear even death; (4) the test showed that early rice in different growth period were flooded after processing, the flooded with the extension of time, the production output is more apparent, embodied in a significant reduction in the total grain number and grain weight, grain, empty abortive rate rose sharply, leading to the output of rice has fallen dramatically. (5) flooding treatment on the influence of late rice ultimately reflected on the yield and its composition. Late rice yield and submergence depth of water treatment and flooding time there is a close relationship, with the increase of submergence depth and flooded the extension of time, the rice yield presents a downward trend, and decreased gradually, all flooded rice basic processing more than 5 days crop.