植烟土壤速效磷含量及变化规律的研究

Study on Available Phosphorus Content and Changing Pattern in Tobacco Planting Soils

摘要: 对1987~2003年黑龙江省植烟土壤8 992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>50 mg/kg，平均每5年增加10 mg/kg；土壤速效磷>40 mg/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<10 mg/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。

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.