Interactions between phosphorus availability and microbes in a wheat-maize double cropping system: A reduced fertilization scheme

文献类型： 外文期刊

第一作者： Yu Xiao-jing

作者： Yu Xiao-jing;Chen Qi;Shi Wen-cong;Gao Zheng;Sun Xiao;Dong Jing-jing;Liu Zhi-guang;Zhang Min;Li Juan;Wang Heng-tao;Gao Jian-guo

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关键词： wheat-maize rotation; Olsen-P; alkaline phosphatase; phosphorus fertilization; calcareous soils

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.384； 五年影响因子：4.021 ）

ISSN： 2095-3119

年卷期： 2022 年 21 卷 3 期

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收录情况： SCI

摘要： Mechanisms controlling phosphorus (P) availability and the roles of microorganisms in the efficient utilization of soil Pin the wheat-maize double cropping system are poorly understood. In the present study, we conducted a pot experiment for four consecutive wheat-maize seasons (2016-2018) using calcareous soils with high (30.36 mg kg(-1)) and low (9.78 mg kg(-1)) initial Olsen-P content to evaluate the effects of conventional P fertilizer application to both wheat and maize (Pwm) along with a reduced P fertilizer application only to wheat (Pw). The microbial community structure along with soil P availability parameters and crop yield were determined. The results showed that the Pw treatment reduces the annual P input by 33.3% without affecting the total yield for at least two consecutive years as compared with the Pwm treatment in the high Olsen-P soil. Soil water-soluble P concentrations in the Pw treatment were similar to those in the Pwm treatment at the 12-leaf collar stage when maize requires the most P. Furthermore, the soil P content significantly affected soil microbial communities, especially fungal communities. Meanwhile, the relative abundances of Proteobacteria and alkaline phosphatase (ALP) activity of Pw were significantly higher (by 11.4 and 13.3%) than those of Pwm in soil with high Olsen-P. The microfloral contribution to yield was greater than that of soil P content in soil with high Olsen-P. Relative abundances of Bacillus and Rhizobium were enriched in the Pw treatment compared with the Pwm treatment. Bacillus showed a significant positive correlation with acid phosphatase (ACP) activity, and Rhizobium displayed significant positive correlations with ACP and ALP in soil with high Olsen-P, which may enhance P availability. Our findings suggested that the application of P fertilization only to wheat is practical in high P soils to ensure optimal production in the wheat and maize double cropping system and that the soil P availability and microbial community may collaborate to maintain optimal yield in a wheat-maize double cropping system.

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