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Methods for Extending Rice Seedling Age and Key Points for Preparing to Transplant Rice While Waiting for Rain as a Drought-Resistance Measure
In a normal year, the seedling age for machine-transplanted rice is about 30 days, about 40 days for seedling-throwing rice, and about 50 days for water-raised seedlings. If the water for transplanting comes late, the seedling age must be extended to more than 60 days in order to wait for water before transplanting. First, sow sparsely to cultivate strong seedlings of extended age. That is, by expanding the area of the seedling-raising bed and reducing the sowing rate per square meter, the tillering-stagnation period of the seedlings is prolonged, which can effectively increase the seedling-age flexibility of seedlings sown early at the proper time and improve seedling quality; this can both raise per-unit yield and resolve the contradiction of having no water for transplanting in the early period.
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