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选择江苏中部地区3个县10个机插稻育秧点为试验点,研究床土培肥前后碱解氮、速效磷和速效钾的含量与秧苗质量关系。结果表明;供试机插稻各育秧试点间床土培肥前后三要素速效养分含量差异大,养分过剩和不足的情况共存,表明床土培肥有其必要性和重要性;根据机插稻中苗壮秧的苗高、发根力和糖氮比等指标,推定床土培肥的碱解氮指标为250-300 mg·kg-1。
Ten planting points of machine-inserted rice in three counties in central area of Jiangsu Province were selected as experimental sites to study the relationship between the contents of available nitrogen, available phosphorus and available potassium and the quality of seedlings before and after soil fertilization. The results showed that there were significant differences in the available nutrient contents of three elements before and after soil fertilization between the pilot planting rice planting sites and the excess and deficiencies of nutrients, indicating the necessity and importance of bed soil fertilization. Seedling height seedling in Zhongmiao, hair root strength and sugar-nitrogen ratio and other indicators, soil-bed fertilization of presumed alkalinity nitrogen index of 250-300 mg · kg-1.