恩施州烤煙種植氣候適生性與土壤適宜性研究
Feasibility of Climate and Soil in Enshi Tobacco Growing Areas
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摘要: 運(yùn)用模糊數(shù)學(xué)隸屬函數(shù)模型對(duì)恩施州主要植煙縣的氣候適生性和土壤適宜性進(jìn)行了綜合評(píng)價(jià)。結(jié)果表明：（1）恩施煙區(qū)具有無(wú)霜期長(zhǎng),、≥10℃積溫高,、日均溫≥20℃持續(xù)天數(shù)多,、土壤pH適宜、土壤含氯量較低等特點(diǎn),，具備生產(chǎn)優(yōu)質(zhì)煙葉的條件,；（2）恩施煙區(qū)氣候適生性指數(shù)(CFI)平均為0.80，各植煙縣（市）分布于0.74~0.87之間,，通過(guò)聚類分析可將8個(gè)植煙縣（市）劃分為3類,；（3）恩施煙區(qū)土壤適宜性指數(shù)(SFI)平均為0.67，各植煙縣（市）SFI值處于0.589~0.805之間,，通過(guò)聚類分析可將8個(gè)植煙縣（市）劃分為4類,。Abstract: Climate feasibility and soil feasibility were evaluated comprehensively by applying membership function and estimating weight values for each indexby using principal components analysis. The results indicated that Ehshi tobacco growing areas had a long frost-free period, high accumulated temperature of≥10℃, a long period of time with daily average temperature of ≥20℃, favorable pH value and low content of chlorine. The basic ecological conditions werefavorable for the development of high quality tobacco leaves. Climate feasibility index (CFI) was 0.80 and ranged from 0.74 to 0.87. Based on CFI, tobaccogrowing areas could be classified into three groups by cluster analysis. Soil feasibility index (SFI) was 0.67, and ranged from 0.589 to 0.805. Based on SFI,tobacco growing areas could be classified into four groups by cluster analysis.
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