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春季水稻育秧期间气候多变,在缸中浸种,由于种层厚,上下层温差大,种子吸水不一,造成催芽后芽头不齐,发芽率一般只有78—82％,降低了良种使用价值,不仅浪费种,而且影响季节及种植计划的完成。近年来,我县把浸种方式由缸改为地坑薄膜覆盖保温浸种,使种谷发芽率提高到95％左右。根据三年实践,现将其优点及作法简介于下,供参考。几个优点 (一)上下温差小,便于增温,种谷发芽势强,整齐度高。此法利用种子吸水对温度敏感的特点,不需酿热物,只是底铺塑料薄膜,以扩大受光面,并减薄种层,上面覆盖拱形塑料薄膜,利用自然阳光增温,使种层上下受热均匀,吸水一致,因而发芽势强,整齐度高。据
During spring rice seedling growth climate change, soaking in the tank, due to the seed layer thickness, the temperature difference between the upper and lower, the seeds of different water absorption, resulting in germination bud irregularity, the germination rate is generally only 78-82%, reducing the value of the use of seeds , Not only waste species, but also affect the completion of the season and planting plan. In recent years, my county to soaking the way from the tank to pit cover insulation soaking, so that seed germination rate increased to about 95%. According to the three-year practice, its advantages and practices are summarized below, for reference. A few advantages (a) up and down the temperature difference is small, easy to warm, seed valley strong potential, high uniformity. This method uses the characteristics of the seed water absorption temperature-sensitive, without stuffing stuff, only the bottom shop plastic film to expand the light-receiving surface, and thinning the seed layer, covered with arched plastic film, the use of natural sunlight warming, so that the seed layer Uniform heating up and down, consistent water absorption, which germination potential, high uniformity. according to