河南烟区土壤有机碳组分特征及其对烟叶化学成分的影响

为了明确河南典型烟区土壤有机碳库组分特征及其对烟叶化学成分含量(质量分数)的影响,采集分析了河南许昌、平顶山、洛阳和三门峡4个典型植烟区的土壤和烟叶样品.结果表明:①河南产区土壤总有机碳(TOC)、活性有机碳(AOC)、颗粒有机碳(POC)和溶解性有机碳(DOC)含量分布范围在3.72～13.80、0.26～0.74、...

Characteristics of soil organic carbon constituents and their effects on chemical components in tobacco leaves from Henan tobacco-planting areas

In order to clarify the characteristics of organic carbon constituents in soil of typical Henan tobacco-planting areas and their effects on the mass fraction of chemical components in tobacco leaves, soil and tobacco samples from four typical tobacco-growing regions, Xuchang, Pingdingshan, Luoyang and Sanmenxia, in Henan were collected and analyzed. The results showed that: 1) The contents of total organic carbon (TOC), active organic carbon (AOC), particulate organic carbon (POC) and dissolved organic carbon (DOC) in soil of Henan tobacco-planting areas ranged from 3.72-13.80, 0.26-0.74, 0.96-4.39 g·kg-1 and 40.71-168.09 mg·kg-1, respectively. The content proportions of AOC, DOC and POC to TOC ranged from 3.19% to 6.93%, 0.34% to 2.62% and 14.33% to 57.31% respectively. The carbon/nitrogen (C/N) ratio was between 6.04 to 12.97. 2) The contents of TOC, POC, AOC and DOC significantly positively correlated with the contents of total nitrogen and hydrolytic nitrogen in soil. The contents of AOC and DOC significantly positively correlated with silt content and significantly negatively correlated with sand content. POC/TOC ratio negatively correlated with the contents of total nitrogen, hydrolytic nitrogen, clay and silt, but positively correlated with sand content. 3) The increase in the contents of TOC and AOC and C/N ratio in soil led to the decrease of total sugar and reducing sugar contents as well as the increase of total nitrogen and total alkaloid in tobacco leaves. POC/TOC ratio positively correlated with total sugar and reducing sugar contents, but negatively correlated with total nitrogen and total alkaloid contents in tobacco leaves. These results indicated that soil organic carbon constituents had important influences on soil fertility and the chemical components in tobacco leaves.