基于PCA方法以牧草营养成分评判青海省海南州天然草地类型质量初探

Evaluation on Types and Quality of Natural Grassland in Hainan Prefecture of Qinghai Province Using Forage Nutrients by PCA Method

为了科学评价天然草地各草地类型中牧草饲料品质的质量,在常规分析的基础上,采用主成分分析法对青海省海南州天然草地各草地类型中的牧草饲料进行了综合质量评定和量化评估,通过对天然草地各草地类型牧草饲料品质主成分分析的综合得分进行对比,较为全面客观地评价了天然草地各草地类型的优劣。结果表明,天然草地各草地类型中高寒草原类牧草饲料品质最好,其次是低平地草甸类、高寒草甸类、温性荒漠类、温性荒漠草原类、温性草原类。

In order to scientifically evaluate quality of forage from different natural grassland types, principal component analysis was used for comprehensive quality assessment and quantitative assessment on the basis of routine analysis. As shown by integrated scores obtained through principal component analysis, advantages and disadvantages of different natural grassland types were objectively evaluated. The results show that the forage from alpine grassland had the best quality, followed by that from bottom land meadow, alpine meadow, temperate desert, temperate desert grassland and temperate grassland.