Phosphorus fertilization affects soybean rhizosphere phosphorus dynamics and the bacterial community in karst soils
Phosphorus fertilization affects soybean rhizosphere phosphorus dynamics and the bacterial community in karst soils
复制标题
施磷对大豆根际磷动态和喀斯特土壤细菌群落的影响
DOI：
10.1007/s11104-020-04662-6
复制
发表时间：
2020-08
期刊：
影响因子：
4.9
通讯作者：
Tian Jiang
中科院分区：
文献类型：
--
作者：
Tian Jihui;Lu Xing;Chen Qianqian;Kuang Xizhi;Liang Cuiyue;Deng Lansheng;Lin Dongjiao;Cai Kunzheng;Tian Jiang
研究背景尽管豆科植物具有很强的磷素吸收能力，但对喀斯特土壤豆科植物根际磷素组分和细菌群落结构的动态研究却很少。梅尔）在喀斯特土壤中，施磷（0和90 kg P ha-1）对大豆根际土壤酸化有显著影响。施磷进一步降低了大豆品种YC 03 -3根际土壤pH、HCl-Pi和残留P，但增加了根际NaHCO 3-Pi，同时增加了大豆对P的吸收和生物量。此外，细菌群落组成显着改变磷肥通过其对土壤pH值和Ca的影响。BacillalesandPseudomonadales是影响磷动态的主要类群，特别是在没有磷输入的土壤。然而，磷肥降低了BacillalesandPseudomonadales的相对丰度，可能是由于增强根际酸化和改善P的status.ConclusionsIn岩溶土壤中，难溶性磷可以直接耗尽或转化为更不稳定的馏分大豆根际酸化，即使磷肥。因此，P施肥抑制细菌（BacillalesandPseudomonadales）的生长，有助于P动员由于这些类群释放P的需求减少。我们的研究结果强调了P施肥在化学P动员中的重要性，这可能会因此影响生物P在大豆根际周转。
BackgroundDespite the high phosphorus (P)-mobilizing capacity of legumes, little is known about the dynamics of the P fractions and bacterial communities in the rhizosphere of legumes in karst soils.MethodsA field experiment was established to investigate P uptake, rhizosphere P fractions and bacterial community structure of soybean (Glycine max(L.) Merr.) in response to P fertilization (0 and 90 kg P ha−1) in karst soils.ResultsSignificant rhizosphere acidification was observed during soybean cultivation. Phosphorus fertilization further decreased soil pH, HCl-Piand residual P, but increased NaHCO3-Piin the rhizosphere of soybean variety YC03–3, which was associated with the simultaneous increase in P uptake and biomass. In addition, the bacterial community composition was significantly altered by P fertilization through its effects on soil pH and Ca.BacillalesandPseudomonadaleswere the primary taxa influencing P dynamics, especially in soils without P input. Nevertheless, P fertilization decreased the relative abundance ofBacillalesandPseudomonadales, probably due to the enhanced rhizosphere acidification and improved P status.ConclusionsIn karst soils, recalcitrant P can be depleted directly or transformed into more labile fractions by soybean rhizosphere acidification, even when P fertilizer is applied. As a consequence, P fertilization suppressed the growth of bacteria (BacillalesandPseudomonadales) that contribute to P mobilization due to the reduced demands on these taxa to release P. Our findings highlight the importance of P fertilization in chemical P mobilization, which may consequently influence biological P turnover in the soybean rhizosphere.
登录
查看更多内容
影响因子：
--
作者：
Caixian Tang;L. Barton;C. Mclay
通讯作者：
Caixian Tang;L. Barton;C. Mclay
西南岩溶地区次生演替过程中氮磷限制的变化
影响因子：
4.9
作者：
Pan, Fujing;Li, Dejun;Chen, Hongsong;Wang, Kelin
通讯作者：
Wang, Kelin
影响因子：
9.8
作者：
Tang, Jing;Tang, XiaoXin;Ji, ZhiLiang
通讯作者：
Ji, ZhiLiang
影响因子：
9.7
作者：
Long, Xi-En;Yao, Huaiying;Zhu, Yong-Guan
通讯作者：
Zhu, Yong-Guan
影响因子：
6.5
作者：
Yu Wang;Xu Zhao;Zhiying Guo;Z. Jia;Shenqiang Wang;K. Ding
通讯作者：
Yu Wang;Xu Zhao;Zhiying Guo;Z. Jia;Shenqiang Wang;K. Ding