水稻机插硬地育苗,是利用水泥场地或土场地代替传统田间育秧,培育符合机插的壮秧,秧苗要求秧龄18～20天,苗高15～17cm,叶龄3.5～4.0叶,达到苗挺、叶绿、生长整齐和秧苗提起时不断裂。1.营养土制备(1)调酸。①酸化煤调酸剂。以粉碎后风化煤作载体,加入硫酸,调制成含腐植酸1.5%,pH=3的调酸剂。把床土调制到pH=6,效果良好。②酸化草炭为调酸剂。以粉碎草炭为载体,即干草炭50kg,加15%的稀硫酸15kg,制成pH=3的调酸剂。③糠醛渣调酸剂。糠醛渣 Paddy planting hard seedlings, is the use of cement field or soil field instead of the traditional field seedling, seedlings grown in line with the strong seedlings planted seedling age 18 to 20 days, seedling height 15 ~ 17cm, leaf age 3.5 to 4.0 leaves, reaching seedlings Ting, leaf green, tidy growth and seedlings raised when not broken. 1. Nutrition soil preparation (1) acid. ① acidified acid agent. Weathered crushed coal as a carrier, adding sulfuric acid, prepared with 1.5% humic acid, pH = 3 acid. The bed soil modulation to pH = 6, the effect is good. ② acidified peat acid for the acid. To smash grass as a carrier, that is, 50kg of hay charcoal, plus 15% 15kg of dilute sulfuric acid, pH = 3 made of acid. ③ furfural acid agent. Furfural residue