唐山地区水稻种植面积150万亩,占全省水稻面积一半,增产潜力很大。随着农村经济体制改革的发展,水稻生产正由传统种植向现代化转移。水稻工厂化育秧的核心之一是人工调整床土的酸度。河北省东部滨海稻区用以配制床土的自然土,一般在pH值7～8左右,秧苗不宜生长(床土pH值5～6为宜)。日本利用硝基腐植酸作为调酸剂,调整床土,既增加了水稻成本又受到局限性,不易推广。丰润县腐植酸厂利用当地的风化 Tangshan rice planting area of ​​150 mu, accounting for half of the province’s rice area, yield great potential. With the development of rural economic system reform, rice production is shifting from traditional planting to modernization. One of the core of rice plant breeding is to adjust the acidity of bed soil. The coastal area of ​​Hebei Province, the coastal rice paddy soil preparation for the preparation of natural soil, generally at a pH of about 7 to 8, seedlings should not grow (bed soil pH 5 to 6 is appropriate). Nitric humic acid as the use of acid as a tune, bed soil adjustment, not only increased the cost of rice has been limited, not easy to promote. Fengrun County humic acid plant using the local weathering