| 摘要: |
| 【目的】明确湖南稻作烟区土壤有效氯的垂直分布规律及其影响因素，为湖南稻作烟区土壤合理利用和精准施肥提供参考。【方法】从长沙、郴州、衡阳3个典型烟区共采集150个0～50 cm剖面土壤样品，利用多元统计方法分析植烟土壤有效氯的垂直分布特征，并通过相关性分析和回归分析研究不同土层土壤有效氯的影响因素。【结果】①土壤有效氯含量在土层间存在显著差异，0～30 cm土层土壤有效氯含量随深度增加逐渐减少，30～50 cm土层土壤有效氯含量随深度增加而增多。②3个烟区有效氯含量在0～30 cm土层存在显著差异，表现为长沙＞衡阳＞郴州（P＜0.05），而在30～50 cm土层中差异不显著（P＞0.05）。③耕作层土壤有效氯含量随pH和土壤体积质量增加而增多，随土壤含水率增大而降低；非耕作层土壤有效氯含量主要受成土母岩自然因素的作用。【结论】在湖南稻作烟区烟叶生产中，需因地制宜控制氯肥施用，合理安排过磷酸钙和钙镁磷肥的交替使用及采用水肥一体化施肥等措施，优化植烟土壤养分以促进优质烤烟生产。 |
| 关键词: 稻作烟区 土壤有效氯 垂直分布 湖南省 |
| DOI： |
| 分类号: |
| 基金项目:湖南省烟草公司科技项目“湖南稻作烟区合理耕层构建与土壤培肥关键技术研究与应用”（湘烟科［2017］170） |
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| Vertical distribution and influencing factors of soil available chlorine in Hunan tobacco-rice rotation area |
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TIAN Lijun,HU Ruiwen,XIAO Yansong,et al
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| Abstract: |
| 【Objective】This study clarified vertical distribution of available chlorine in soils and its influencing factors in Hunan tobacco rice rotation area to provide reference for the rational use and precise fertilization of soil.【Method】A total of 150 soil samples with 0-50 cm profile were collected from three typical tobacco areas in Changsha,Chenzhou and Hengyang.The multivariate statistical method was used to analyze vertical distribution characteristics of available chlorine and the influencing factors were studied through correlation analysis and regression analysis.【Result】① There were significant differences in soil available chlorine between soil layers.The content of available chlorine gradually decreased with the increase of depth within 0-30 cm,while it increased with the increase of depth within 30-50 cm.② There were significant differences in the available chlorine content in the 0-30 cm soil layer between the three areas,and the order was Changsha>Hengyang>Chenzhou (P<0.05).There was no significant difference (P>0.05) in the soil layer of 30-50 cm.③ The available chlorine content of cultivated layer soil increased with the increase of pH and soil volume and mass,while it decreased with the increase of soil moisture content. The available chlorine content of non cultivated layer soil was mainly affected by natural factors related to host rock.【Conclusion】For the tobacco production in tobacco-rice rotation areas in Hunan,it is necessary to adjust chlorine fertilizer based on local conditions,rationally arrange the alternate use of superphosphate and calcium magnesium phosphate fertilizer and adopt integrated fertilization measures such as water and fertilizer to optimize nutrients of tobacco growing soil to promote production of high quality flue cured tobacco. |
| Key words: tobacco rice rotation area oil available chlorine vertical distribution Hunan province |
