【摘要】 对1987～2003年黑龙江省植烟土壤8992个样品的速效磷含量进行了统计分析。结果表明,黑龙江省植烟土壤速效磷平均含量呈明显增加趋势,目前土壤速效磷平均含量>50mg/kg,平均每5年增加10mg/kg;土壤速效磷>40mg/kg的土壤数量逐渐提高,平均每3年增加10个百分点;土壤速效磷<10mg/kg呈逐步下降的趋势。黑龙江省烟区土壤磷含量处于非常丰富的状态。更多还原

【Abstract】 Available phosphorus contents of 8 992 soil samples of flue-cured tobacco fields from 1987～2003 in Heilongjiang province were tested.The results showed that mean contents of available phosphorus increased.The current mean was greater than 50 mg/kg,and increased 10 mg/kg every five years.Percentage of land with >40 mg/kg available phosphorus increased at a rate of 10% every three years.The percentage of land with <10 mg/kg available phosphorus content decreased.Available phosphorus is sufficient in tobacco planting soil in Heilongjiang.更多还原