水稻在灌浆结实期的合理用水,主要是为了养根、保叶,保证灌浆顺利进行。水稻在生育后期如果水分不足,光合作用减弱,就会使水稻叶片提早枯黄,植株早衰,灌浆不足,从而影响谷粒的饱满程度。如过早断水,就会影响有机物质的合成和运输,穗部的小枝梗就会干枯折断,造成谷粒脱落,秕粒增多.粒重下降,直至减产。水稻到 Rice in the filling of the rational use of water, mainly for the root, leaf, ensure smooth grouting. Rice in the late growth stage if the lack of water, photosynthesis weakened, it will make the early brown rice leaves, premature aging plants, lack of filling, thus affecting the full extent of the grain. If the water is cut off too early, the synthesis and transport of organic substances will be affected, and the branchlets of the ear will be dried and broken, resulting in the fall of grains and the increase of grains. Rice to