湖南省植烟土壤养分丰缺状况的分析

Analysis of the Status of Soil Fertility in Hunan Tobacco-growing Areas

为了解湖南省植烟土壤养分状况,提供平衡施肥技术,对采集的2320个土样的养分进行了测试分析.结果表明:湖南烟区土壤养分含量存在较大的差异.土壤平均pH值为6.5,有机质35.40g/kg,全氮2.05g/kg,全磷0.75g/kg,全钾14.70g/kg,碱解氮185.30mg/kg,有效磷19.70mg/kg,有效钾118.10mg/kg,有效铜3.10mg/kg,有效铁80.20mg/kg,有效锌2.08mg/kg,有效锰27.92mg/kg,有效硼0.20mg/kg,针对湘南烟区有效钾含量较低,有效硼供应不足的现状,提出了控氮、补磷、增钾,增施硼肥;偏酸性土壤施用适量的石灰和镁肥的建议.针对湘西烟区有效磷含量较低,有效硼供应不足,部分土壤有效锌、锰的含量明显不足的现状,提出了稳氮、增磷、补钾,增施硼肥,对部分土壤补施锌、锰肥的建议.

The 2 320 soil samples from Hunan tobaccogrowing areas are analysed.Results indicate that content of soil nutrients show significant variation at different locations. The average contents are as follows: pH 6.5, organicmatter 35.4 g/kg,total N 2.05 g/kg,total P 0.75 g/kg,total K 14.7 g/kg,hydrolytic N 185.30 mg/kg,available P 19.70 mg/kg,available K 118.10 mg/kg,available Cu 3.10 mg/kg,available Fe 80.20 mg/kg,available Zn 2.08 mg/kg,available Mn 27.92 mg/kg,available B 0.20 mg/kg.Contents of available P and available B are low.It is suggested that controlling N, supplying P, increasing K, adding B and Mo, and rational application of lime to acid soil for balanced fertilization be paid attention in Hunan tobaccogrowing areas.