Evaluation of farmland soil fertility in Jiuquan City based on principal component analysis

doi:10.14088/j.cnki.issn0439-8114.2023.03.004

Abstract

Abstract: To evaluate the farmland soil fertility status in Jiuquan City and provide data support for the sustainable development of agriculture. Taking the farmland soil of five counties （cities, districts） in Jiuquan City was taken as the research object, six fertility indexes of soil organic matter, total nitrogen, alkali-hydrolyzable nitrogen, available phosphorus, available potassium and pH were determined, and the soil fertility was comprehensively evaluated by principal component analysis. The results showed that the organic matter and nitrogen of farmland soil in Jiuquan City were generally low, the phosphorus was rich, the potassium was medium, and the pH was alkaline. The spatial distribution of farmland soil nutrients was uneven, but the change was not significant. The principal component analysis showed that the main factor causing the change of farmland soil fertility in Jiuquan City was the organic matter, and the comprehensive fertility of farmland soil in Jiuquan City from high to low was Suzhou District, Guazhou County, Dunhuang City, Yumen City, and Jinta County. To sum up, the overall level of soil fertility in Jiuquan City was good. It was recommended to follow the principles of supplementing organic fertilizer and nitrogen fertilizer, reducing phosphorus fertilizer and stabilizing potassium fertilizer.

Key words: principal component analysis, soil fertility, farmland, Jiuquan City

CLC Number:

S158.2

DENG Xi-ming, LYU Duo, WU Xiao-ting, FENG Tao, ZHANG Mei-zhen, ZHU Jian-qiang. Evaluation of farmland soil fertility in Jiuquan City based on principal component analysis[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(3): 21-24.

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