烤煙鉀含量與土壤pH、有機(jī)質(zhì)和速效鉀含量的關(guān)系
Relationship between Potassium Content in Flue-cured Tobacco Leaf and Soil Organic Matter, Available Potassium and pH
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摘要: 收集了紅云紅河集團(tuán)昆明,、曲靖,、保山3 個(gè)煙葉基地866 個(gè)點(diǎn)的烤煙與土壤樣品數(shù)據(jù)，利用相關(guān)分析和聚類分析,，系統(tǒng)分析了煙葉鉀含量與土壤pH,、有機(jī)質(zhì)和速效鉀含量間的關(guān)系。結(jié)果表明：（1）3 個(gè)基地?zé)熑~平均鉀含量為2.21%,，地區(qū)間存在一定變異,，變幅為1.05%~3.84%,，變異系數(shù)為18.10%。煙葉鉀含量總體上呈現(xiàn)出保山>曲靖>昆明的趨勢(shì),。（2）3個(gè)基地的煙葉鉀含量均與土壤有機(jī)質(zhì),、速效鉀含量呈極顯著正相關(guān)，與土壤的pH 呈極顯著負(fù)相關(guān),。（3）用煙葉鉀含量和土壤pH,、有機(jī)質(zhì)和速效鉀含量進(jìn)行聚類分析，將昆明,、曲靖,、保山煙葉基地分別分為3 種煙葉生態(tài)類型區(qū)域，其中,，煙葉鉀含量較高的區(qū)域,，其對(duì)應(yīng)的土壤pH 較低，且土壤的有機(jī)質(zhì),、速效鉀含量較高,。這也表明土壤pH、有機(jī)質(zhì)含量的高低,，直接影響到土壤速效鉀的供應(yīng)狀況,，進(jìn)而影響到煙葉鉀含量的積累。Abstract: We analyzed the relationship between potassium (K) content of 866 flue-cured tobacco leaf samples and organic matters, available K, pH in soils from Hongyun Honghe Group bases in Kunming, Qujing, and Baoshan tobacco growing areas. Results indicated that the mean K content in flue-cured tobacco leaf was 2.21%. The K content ranged from 1.05 to 3.84 with variation coefficient of 18.10%, and showed a big variation among different areas, and total K content in Baoshan > in Qujing > in Kunming. (2) Leaf K content had very significant negative correlation with soil pH and had very significant positive correlation with content of organic matter and available K in soil among different areas, and the leaf K content and the three kinds of physical and chemical index including organic matter, available K and pH in soil. (3) By using leaf K content, soil organic matter, available K, and pH as index, we conducted a cluster analysis and divided into three groups of high, medium and low content with different levels. Comparing different cluster results, if corresponding potassium content in flue-cured tobacco leaf was high, the soil pH was lower, but organic matter and available K were higher. The result showed that the soil pH and content of organic matter directly affected the supply of soil the soil available K elements, then affected the accumulation of potassium content in tobacco leaf.
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