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一、前言提高胡萝卜产量、品质的栽培技术要点之一,就是要求早发芽,并且整齐一致。胡萝卜种子发芽率,室内检验平均达到70%,但在实际栽培中仅30～40%,大大低于其它作物。如果播种时遇到低温、土壤干燥或覆土过厚,更使其发芽率低下。胡萝卜也迎来了F1时代,近年育成、推广了许多杂交一代品种。胡萝卜种子的饱满度在很大程度上受到采种株开花、成熟期长势的影响,F1种子采种株表现近亲交配劣势,植株长势弱,比异交株易受开花、成熟期天气变化的影响。因此,不同年度由于种子饱满度的差别,存在发芽力变动的问题。据苏联报道,种子通过反复吸水、干燥处理,能够促进发芽,亦可增产。该处理称作Presowinghardening(即种前驯化,下称种子硬化处理)。
First, the preface Improve carrot yield, quality of cultivation techniques one of the points is to require early germination, and neat and consistent. The germination rate of carrot seeds, laboratory tests, an average of 70%, but in the actual cultivation of only 30 to 40%, significantly lower than other crops. If you encounter low temperatures when sowing, the soil is dry or overburden too thick, but also make its germination rate is low. Carrot also ushered in the F1 era, bred in recent years, promote many hybrid generation varieties. The plumpness of carrot seeds is largely affected by the flowering and maturity of the seed-bearing plants. The F1 seed-bearing plants show the inferiority of inbreeding, the weak growth of F1 plants, and the more susceptible of the cross-pollinated plants to the weather changes of flowering and maturity. Therefore, in different years due to differences in seed fullness, there is the problem of germination changes. According to reports from the Soviet Union, seeds through repeated water absorption, drying, can promote germination, but also increase production. This treatment is called Presowinghardening (pre-species domestication, hereinafter referred to as seed hardening treatment).