烤煙煙堿含量與土壤養(yǎng)分的關(guān)聯(lián)分析
Correlation Analysis between Nicotine Content of Flue-cured Tobacco Leaves and Soil Nutrients
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摘要: 在我國7 個(gè)主產(chǎn)煙省的12 縣,，統(tǒng)一栽培模式，采用描述統(tǒng)計(jì)、逐步回歸分析和典型相關(guān)分析研究了烤煙煙堿含量與土壤養(yǎng)分的關(guān)系,。結(jié)果顯示：不同試點(diǎn)縣的土壤養(yǎng)分含量差異較大,，速效磷和全磷的變異最大，速效鉀和全鉀含量分布的均衡性也較差,，pH則比較均勻,。下部葉煙堿含量的變異程度相對較大。土壤養(yǎng)分與煙堿含量相關(guān)明顯,，不同部位煙葉煙堿含量與土壤養(yǎng)分指標(biāo)的關(guān)聯(lián)度顯著不同,。堿解氮、pH,、有機(jī)質(zhì),、全磷和速效磷對煙堿含量的影響較大，是影響煙葉煙堿含量的主導(dǎo)土壤養(yǎng)分因子,，堿解氮的作用最顯著，其次為土壤pH,。堿解氮,、pH、有機(jī)質(zhì)對煙堿含量做正效應(yīng)貢獻(xiàn),，全磷和速效磷對煙堿積累不利,。通過營養(yǎng)調(diào)控?zé)焿A含量時(shí)，選擇弱酸性,、有機(jī)質(zhì)含量適中的土壤,，控制施氮，增施磷肥是中心措施,。Abstract: The relationship between soil nutrients and nicotine content of flue-cured tobacco leaves was analyzed by descriptive statistic analysis, stepwise regression analysis and canonical correlation analysis under the same cultivation conditions in 12 counties of 7 provinces. The results indicated that considerable differences of soil nutrient contents were found in different pilot counties. The variation extents of available P and total P were the biggest. The soil pH exhibited balanced distribution, while available K and total K showed the opposite. The variation of nicotine content was bigger in lower leaves than that in middle or upper leaves. There was significant correlation between nicotine content and soil nutrients. The correlation degree between nicotine content of different positioned flue-cured tobacco leaves and soil nutrient was apparently different. The dominant soil nutrient factors influencing the nicotine content of tobacco leaves were available N, pH, OM, available P and total P, the available N had the greatest effect on nicotine content, followed by soil pH. The available N, pH and OM had positive effects on nicotine content, while the available P and total P had negative correlation with nicotine. The principle measures to nutritional regulation of nicotine included the selection of weak acidic soil with moderate organic matter content, the control of nitrogen fertilizer rate and the increase of phosphate fertilizer rate.
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