Premature aging refers to the early decline of leaf function and even death before the immature stage of rice. The main cause of premature aging of rice is due to lack of fertilizer in the late stage, too early water supply or too much water in the late stage. Premature aging can seriously affect rice yield. Premature aging of rice is related to traits, pests and diseases, as well as premature aging.
Therefore, to prevent premature aging, first of all, it should be rationally planted closely; secondly, it should be promoted smoothly in fertilization technology. For rice with premature aging caused by lack of fertilizer, grain fertilizer or root top dressing can be applied at the heading, such as 1% to 2% urea or 2% Calcium phosphate; the third pair of soils with poor soil and poor permeability should be dry and wet and wet in the later stage to prevent premature water loss. In the late growth stage of rice, in case of low temperature or typhoon, it is necessary to timely water and protect seedlings.
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