四川烟区植烟土壤理化性质对烟叶物理特性影响.docVIP

四川烟区植烟土壤理化性质对烟叶物理特性影响 　　摘 要：为了了解土壤理化性质对烟叶物理特性的影响，进一步提高烟叶质量，对四川烟区不同产区土壤理化性质与烟叶物理特性的关系进行分析，相关分析结果表明，耕层质地（x2）与单叶质量（y3）极显著负相关（-0.656）；土壤有机质（x4）与叶宽（y2）极显著正相关（0.683），其他土壤属性对烟叶物理特性各指标均有不同程度影响；典型相关分析表明，土壤理化性质对烟叶物理特性的影响主要表现在土壤速效氮 （x5）对烟叶叶质重（y5）的影响，以及土壤耕层厚度（x1）、速效钾（x7）对烟叶叶长（y2）与含梗率（y4）的影响。因此在烟叶生产过程中可以通过控制施肥等措施改善土壤属性进而提高烟叶的物理特性。 　　关键词：植烟土壤；烟叶物理属性；简单相关分析；典型相关分析 　　中图分类号：S572 文献标识码：A DOI 编码：10.3969/j.issn.1006-6500.2018.01.019 　　Abstract： In order to understand the effect of soil physical and chemical properties on the physical characteristics of tobacco leaves and to further improve the quality of tobacco leaves， the soil properties and the physical characteristics of tobacco leaves in different areas of Sichuan tobacco-growing areas were evaluated and analyzed. The results showed that top soil texture （x2） had a significant negative correlation with leaf weight （y3） while soil organic matter （x4） had a significant positive correlation with leaf width （y2）， and the coefficient were -0.656 and 0.683， respectively. Other soil properties had different effects on the physical characteristics of tobacco leaves. Based on the canonical correlation analysis， the main effects of soil physical and chemical properties on the physical characteristics of tobacco leaves were the effect of soil available nitrogen content （x5） on the leaf specific weight （y5） and soil plowing thickness （x1）， available potassium （x7） on the leaf length （y2） and stem ratio （y4）. Therefore， the physical properties of tobacco leaves could be improved by controlling the fertilization and other measures in the tobacco production process. 　　Key words： tobacco-growing soil； tobacco leaf physical properties； simple correlation analysis； typical correlation analysis 　　良好的土壤?h境和土壤质量是优质烟生产的前提[1-3]，土壤为烟草生长提供必需的营养和水分，肥力质量良好的土壤可以保证烟草生长所需的水、肥、气、热协调供应[4]，全面科学分析土壤类型对烟叶质量的影响，有助于发挥四川烟区烟叶质量优势[5]，增加经济效益，提高农民积极性，保障烟叶生产既快又好地发展[6]，国内外学者为提高烟叶质量，在土壤结构改善方面开展了大量研究[3-6]，程贵敏等[7]对植烟土壤轮作对土壤养分和烟叶主要化学成分的影响进行研究，指出连作烟地较轮作烟地土壤有机质相对下降而有效钾相对增加