摘要
为了解贵阳市茶园土壤的肥力状况,以开阳县龙岗镇和花溪羊艾茶园土壤为研究对象,测定分析13项土壤肥力指标,采用主成分分析与相关性分析、结合Norm值构建土壤指标的最小数据集(MDS),通过指标权重与隶属度求得土壤肥力综合值(IFI)进行土壤肥力评价。结果表明,最小数据集(MDS)指标包括全磷、蔗糖酶、速效钾和有机质4个。土壤碱解氮和速效钾是影响茶园土壤肥力的主要限制因子,开阳和花溪茶园土壤肥力综合值为II级,总体处于中上水平。基于最小数据集的土壤肥力评价结果与全数据集的结果呈正相关关系,相关系数为0.8961,故可采用最小数据集方法代替全量数据集方法评价土壤肥力。
In order to understand the soil fertility status of tea gardens in Guiyang, taking the soils of Longgang Town and Huaxi Yang’ai tea gardens in Kaiyang County as the research objects, 13 soil fertility indicators were measured and analyzed, and principal component analysis and correlation analysis were used to construct soil indicators combined with Norm value. And evaluate the soil fertility by obtaining the comprehensive soil fertility value (IFI) through the indexes weight and membership degree. The results showed that the minimum data set (MDS) indicators included total phosphorus, sucrase, available potassium and organic matter. Soil alkaline hydrolyzable nitrogen and available potassium were the main limiting factors affecting soil fertility in tea gardens. The comprehensive soil fertility value of Kaiyang and Huaxi tea gardens was II, which was generally at the middle and upper level. The soil fertility evaluation results based on the minimum data set have a positive correlation with the results of the full data set, and the correlation coefficient was 0.8961, so the minimum data set method can be used instead of the full data set method to evaluate soil fertility.
出处
《植物学研究》
2022年第3期257-269,共13页
Botanical Research
