遵義市植煙土壤養(yǎng)分狀況分析
Analysis of Nutrient Status of Tobacco Planting Soils in Zunyi
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摘要: 對遵義市91個植煙土樣12個養(yǎng)分指標進行了主成分和聚類分析，提取了4個主成分,，計算出了各植煙縣土壤肥力的綜合得分,。對綜合得分以歐氏距離為衡量土樣間差異大小的指標，采用系統(tǒng)聚類法,，按距離系數(shù)8進行截取,，將10個植煙縣土壤類型分為5類。評價結(jié)果為：遵義縣單獨為一類,，土壤肥力綜合排名最高,，屬高氮,、高磷、中鉀區(qū),。湄潭縣,、余慶縣、道真縣,、務川縣4個縣聚為一類，綜合排名第二,，屬中氮,、中磷、中鉀區(qū),。綏陽縣單獨為一類,，土壤肥力綜合排名第三，表現(xiàn)為中氮,、中磷,、高鉀的特征。桐梓縣,、鳳岡縣,、正安縣三縣聚合為一類，土壤肥力綜合排名第三,，為中氮,、中磷、低鉀區(qū),。仁懷縣單獨為一類,，土壤肥力排名最低，為低氮,、低磷和中鉀區(qū),。Abstract: Principal component analysis and systemic cluster analysis were used to analyze 12 nutrient indices of 91 soil samples from Zunyi. Four principal components and general index of each flue-cured tobacco planting county were obtained. According to the cluster graph and 8 distance modulus，the soil samples of Zunyi were divided into 5 groups. The first group was Zunyi county with high nitrogen (N), high phosphorus (P), and middle potassium (K). The second group included Meitan, Yuqing, Daozhen, and Wuchuan, whose characters were middle N, middle P and middle K. The third group was Suiyang with middle N, middle P and high K. The fourth group included Tongzi, Fenggang and Zheng’an, whose characters were middle N, middle P and low K. The last group was Renhuai with low N, low P, and middle K.
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