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三、作物种子检验方法这个标准适用于本公社各种子生产提供单位,包括原种、良种和备荒种子。(一)取样必须具有代表性。按种子来源及不同品种,分别取样。装袋的用取样器分上、中、下三层取样;散装的或囤装的分层实行五点梅花形取样。每个样品不少于2斤。(二)检验。把受检种子的样品,用对角线四分法,分一至数次,分成小样,然后进行检验。1.水分测定。每小样提取30—40克,粮豆作物磨碎,其它作物剪碎,然后放进预热115℃的电烘箱内关闭箱门,调整温度到105℃,烘3小时(油料作物为90分钟),冷却后再称重,然后再按同样方法放入箱内再烘1小时,冷却后称重。两次差异不超过0.2克,即可停止烘烤,计算含水量。公式是:
Third, crop seed testing methods This standard applies to the commune production of various units to provide units, including the original species, seeds and spare seeds. (A) Sampling must be representative. By seed source and different varieties, respectively, sampling. Bagging with the sample points, the middle and lower three sampling; bulk or store layered five-point plum-shaped sampling. Not less than 2 pounds per sample. (B) test. Samples of the seeds to be seized, with a diagonal four-point method, divided into several times, divided into small samples, and then tested. Moisture determination Each sample is extracted 30-40 grams, grain crops grated, other crops cut, and then placed in a preheated 115 ℃ electric oven inside the closed door, adjust the temperature to 105 ℃, bake 3 hours (oil crops for 90 minutes) , After cooling and weighing, then press the same method into the box and then bake 1 hour, cooled and weighed. Twice the difference does not exceed 0.2 grams, you can stop baking, calculate the water content. The formula is: