Reason: Premature aging refers to the premature decline of important functions of leaf stalks and other parts in the late growth stage of rice, weakening the photosynthesis of functional leaves, reducing the source of irrigated substances, and premature aging of some plants, because the early growth is too prosperous, to the late growth stage. The deepening of the contradiction between the group and the individual accelerates the aging rate of the root leaves; another reason is the improper management of water and fertilizer in the late stage, the water cuts too early, the supply of nitrogen and phosphorus is insufficient, and the vegetative body of the plant cannot grow nutrients, and some Poor soil permeability, lack of oxygen and toxic reducing substances, resulting in poor root development in the late rice, weakened ability to absorb nutrients, leading to weak growth of the aboveground. Prevention and control: scientific water management, shallow water irrigation after the graining to the filling stage, warming and promoting ripening, intermittent irrigation from the ripening stage to the yellow ripening period; rational fertilization to prevent mid-term de-fertilization, and late application of ear grain fertilizer to improve photosynthesis. Salted Mekabu,Mekabu Wakame Seaweed,Salted Mekabu Seaweed,Salted Mekabu Chuka Seaweed Wakame DALIAN HAIBAO FOODS CO., LTD. , https://www.haibaoseafoods.com