Evaluation of soil fertility quality in different salinized cotton fields：Taking Shaya County, Xinjiang as an example

doi:10.14088/j.cnki.issn0439-8114.2023.06.007

Abstract

Abstract: To evaluate the soil fertility quality in different salinized cotton fields in Shaya County, Xinjiang, the relationship between salinization and soil fertility in oasis cotton fields was discussed. Taking the core cotton planting areas of Shaya County as the research object, a combination of field experiments and indoor tests was adopted,seven physical and chemical indexes of soil were measured, and the weight of evaluation indexes was determined by principal component analysis. The soil integrated fertility index was used to evaluate the soil fertility of cotton fields. The results showed that there was no significant difference in soil bulk density and alkaline nitrogen content between cotton fields with different salinization levels. The content of most nutrient indicators in non salinized and salinized cotton fields showed significant differences, while the content of most indicators in salinized cotton fields was relatively similar.The soil integrated fertility index in non saline cotton fields was significantly different from that in saline cotton fields, while there was no significant difference in the soil integrated fertility index in saline cotton fields soil salinization affected the fertility status of cotton fields;regression analysis could further reflect their relationship. The total salt content of soil and the soil integrated fertility index （IFI） showed a parabola trend. With the increase of total salt content of soil, nutrient availability decreased, and soil biological activity was inhibited, thus affecting the formation and accumulation of soil fertility. When the total salt content was greater than 8.83 g/kg, the index showed an upward trend, and the regression equation between soil total salt content （x） and IFI （y） was y=0.643 1-0.063 6x+0.003 6x²（r²=0.489 1）.

Key words: cotton fields, soil salinization, soil fertility quality, principal component analysis, Shaya County,Xinjiang

CLC Number:

S562

WU Chu-peng, SHENG Jian-dong, HU Yu-tong, CHENG Zhi-hui. Evaluation of soil fertility quality in different salinized cotton fields：Taking Shaya County, Xinjiang as an example[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(6): 33-38.

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