湖南郴州煙區(qū)土壤養(yǎng)分狀況分析
Soil Nutrient Status in Chenzhou Tobacco Planting Areas
-
摘要: 對(duì)郴州主產(chǎn)煙縣（區(qū)）734 個(gè)土壤樣品養(yǎng)分進(jìn)行了分析。結(jié)果表明,，郴州煙區(qū)土壤略偏堿,；有機(jī)質(zhì)總體上較豐富，平均為42.30 g/kg,，高于湖南省平均值,；土壤全氮和堿解氮含量較高；全磷含量平均為0.93 g/kg,，速效磷在土壤中的分布極不均衡,，適宜范圍10～20 mg/kg 的土壤樣品只占20.84%,；土壤全鉀及速效鉀含量偏低，由南到北,，由西到東呈逐漸增加的趨勢(shì),。煙區(qū)土壤普遍缺硼，有91.28%的土壤樣品低于缺硼臨界值0.30 mg/kg,；有效鋅含量總體上較高,，2～4 mg/kg 豐富含量范圍內(nèi)的土壤樣品占52.04%；有效錳含量高于20 mg/kg 以上的樣品占37.53%,；有效銅總體上含量豐富,，高于1 mg/kg 的土壤樣品所占比例高達(dá)79.57%；有效鐵含量平均為87.23 mg/kg,，處于極豐富水平,。花崗巖發(fā)育的紅壤含鎂量很低,，煙株總體上缺鎂,。Abstract: We analyzed 734 of soil samples from major tobacco planting counties in Chenzhou. The result indicated that, in Chenzhou tobacco planting regions, soils were slightly alkali, average organic matter content was 42.30 g/kg, which was higher than the average in Hunan province. Soil total N and available N content was relatively high. Soil total P content, on average, was 0.93 g/kg. Soil available P content varied widely, only 20.84% of the samples were in the suitable range (10-20 mg/kg). Soil total K and available K contents were relately low, which increased gradually from south to north and from west to east. Most of tobacco planting areas were B deficiency. Available B content in 91.28% of the soil samples was lower than critical value of 0.30 mg/kg. Available Zn content was relatively high. Available Zn in 52.04% of soil samples was in the suitable range (2-4 mg/kg). Available Mn content in 37.53% of soil samples was higher than 20 mg/kg. Available Cu content in 79.57% of soil samples was higher than 1 mg/kg. Available Fe content, on aveage, was 87.23 mg/kg. Available Mg content in soils from granite was generally low, and tobacco had Mg deficiency.
下載: