抄録
1) For the purpose of protecting rice plants from a cold irrigation water damage at the entrance of a water way in a paddy field, a dispersed irrigation method with wheat straw bundles was devised and studied. 2) The dispersed irrigation method with wheat straw bundles was arranged as follows; wheat straw bundles which was some 10 cm in diameter were fixed to the surface of a paddy field, making a row with them along a levee, and setting its row inside at 30 cm apart from a levee. As the results, the irrigation water, through the wheat straw bundles, ran slowly into a paddy-field. 3) By using this irrigation method, the irrigation water temperature could be raised bringing about the better growth and ripeness, and higher yield of rice plants.
