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早稻耐寒育秧新技术是在旱育条件下进行的．要求土壤的pH值为4．5—5。对荣床土壤pH值高于5．5的，都必须进行调酸处理。一、调酸的作用1．防止“立枯病”的危害。立枯病属低温病菌，早稻育秧期土壤水分不饱和时易发生。上镶pH值在5以下时，对立枯病有抑制作用。2．促进秧苗健
Early rice cold-resistant seedlings new technology is carried out under dry conditions. Requires soil pH value of 4.5-5. On the soil bed pH value higher than 5.5, must be acid treatment. First, the role of acidity Prevent “blight” harm. Dwarf disease is a low-temperature germ, early rice breeding seedlings when the soil moisture is not easy to occur. On the setting of pH below 5, the damping off on the damping effect. 2. Promote seedling health