永州烟区土壤养分状况研究

Study on Nutrition of Tobacco-growing Soil in Yongzhou

对永州南6县主产烟区的664个土壤样品养分进行了分析,结果表明:永州烟区土壤平均pH值为7.0,有机质38.7 g/kg,全氮2.4 g/kg,全磷0.8 g/kg,全钾11.1 g/kg,碱解氮215.2 mg/kg,有效磷21.2 mg/kg,有效钾84.2 mg/kg,有效铜2.9 mg/kg,有效铁72.7 mg/kg,有效锌1.8 mg/kg,有效硼0.1 mg/kg,有效锰19.3 mg/kg,有效钼0.1 mg/kg,有效硫35.9 mg/kg,有效氯29.4 mg/kg,代换性钙10.6(1/2 cmol/kg),代换性镁0.9(1/2 cmol/kg),阳离子交换量14.0 cmol/kg,针对永州烟区土壤偏碱,富含氮、氯、铁、硫、钙,缺钾、硼和钼的现状,提出了控氮、补钾、增硼和钼、减钙的整体施肥建议。

Nutritient matters in 664 soil samples taken from main tobacco-growing field in 6 counties of Yongzhou were studied. The results indicated that the average pH value in Yongzhou tobacco-growing field was 7.0, the content of organic matter, total nitrogen, total phosphorus, total potassium, available nitrogen, available P, available K, available Cu, available Fe ,available zn, available B, available Mn, available Mo, available S, available chlorine, substitute Ca, substitute mg and cation exchange capacity were 38.7 g/kg, 2.4 g/kg, 0.8 g/kg, 11.1 g/kg, 215.2 mg/kg, 21.2 mg/kg, 84.2 mg/kg, 2.9 mg/kg, 72.7 mg/kg, 1.8 mg/kg, 0.1 mg/kg, 19.3 mg/kg, 0.1 mg/kg, 35.9 mg/kg, 29.4 mg/kg ,10.6 （1/2 cmol/ kg）,0.9 （1/2 cmol/kg）, 14.0 cmol/kg respectively. According to the current state of the soil being slightly alkaline and rich in nitrogen, chlorine, ferrum, surpbur, calcium but lack potassium, boron, molybdenum, suggestions of controlling content of nitrogen, increase potassium,boron and molydenum, and reduce calcium were put forward.