植煙土壤速效磷含量及變化規(guī)律的研究
Study on Available Phosphorus Content and Changing Pattern in Tobacco Planting Soils
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摘要: 對1987~2003年黑龍江省植煙土壤8 992個(gè)樣品的速效磷含量進(jìn)行了統(tǒng)計(jì)分析,。結(jié)果表明，黑龍江省植煙土壤速效磷平均含量呈明顯增加趨勢,，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的土壤數(shù)量逐漸提高,，平均每3年增加10個(gè)百分點(diǎn);土壤速效磷<10 mg/kg呈逐步下降的趨勢,。黑龍江省煙區(qū)土壤磷含量處于非常豐富的狀態(tài)。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.
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