不同盐渍化棉田土壤肥力质量评价——以新疆沙雅县为例

doi:10.14088/j.cnki.issn0439-8114.2023.06.007

摘要/Abstract

摘要： 为评价新疆沙雅县不同盐渍化棉田土壤肥力质量,探讨绿洲棉田盐渍化与土壤肥力的关系。以沙雅县核心植棉区为研究对象,采用野外试验和室内测试相结合的方法,测定土壤7项理化指标,利用主成分分析法确定评价指标权重,运用土壤肥力综合指数法对棉田土壤肥力状况进行评价。结果表明,不同盐渍化水平棉田的土壤容重和碱解氮含量无显著差异,非盐渍化棉田与盐渍化棉田的多数养分指标含量差异显著,而盐渍化棉田间的多数指标含量比较接近。非盐渍化棉田与盐渍化棉田的土壤肥力综合指数差异显著,盐渍化棉田间土壤肥力综合指数无显著差异,土壤盐渍化影响棉田肥力状况;回归分析可进一步反映它们的关系,土壤全盐量与土壤肥力综合指数（IFI）呈抛物线变化趋势,随着土壤全盐量的增加,养分有效性降低,土壤生物活性受到抑制,从而影响土壤肥力的形成和积累,当全盐量大于8.83 g/kg时,指数呈上升趋势,土壤全盐量（x）与IFI（y）的回归方程为y=0.643 1-0.063 6x+0.003 6x²（r²=0.489 1）。

关键词: 棉田, 土壤盐渍化, 土壤肥力质量, 主成分分析, 新疆沙雅县

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

中图分类号:

S562

吴楚鹏, 盛建东, 胡雨彤, 成志慧. 不同盐渍化棉田土壤肥力质量评价——以新疆沙雅县为例[J]. 湖北农业科学, 2023, 62(6): 33-38.

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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