Decreases in soil P availability are associated with soil organic P declines following forest conversion in subtropical China

Yang, Liuming; Yang, Zhijie; Zhong, Xuhua; Xu, Chenping; Lin, Yanyu; Fan, Yuexin; Wang, Minhuang; Chen, Guangshui; Yang, Yusheng

doi:10.1016/j.catena.2021.105459

Cited by 29 publications

(20 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…53 We illustrated that it is the PSBs that secrete a large amount of organic acids that cause the pH in the supernatant to decrease, thereby dissolving insoluble phosphorus. This is consistent with the result of Yang et al, 54 where soil pH affected the changes in P fractions. Furthermore, the multiple beneficial effects of PSB are widely regarded as key factors to promote plant growth and increase the availability of soil P. Plant hormones or phytohormones also play a crucial role in plant growth and development.…”

Section: Discussionsupporting

confidence: 93%

Growth promotion ability of phosphate‐solubilizing bacteria from the soybean rhizosphere under maize–soybean intercropping systems

et al. 2021

View full text Add to dashboard Cite

BACKGROUND Optimum cultivation and management measures are needed to increase the phosphorus (P) absorption efficiency of crops for sustainable agricultural production. Previous studies indicated that leguminous crops can promote P absorption by neighboring gramineous crops. In this study, we isolated and screened the phosphate‐solubilizing bacteria (PSB) from soybean rhizosphere under a maize–soybean intercropping system in Southwest China, and nine PSBs with high P‐solubilizing ability were identified. RESULTS 16S rDNA sequencing and phylogenetic analysis showed that these PSBs belong mainly to Bacillus and Pseudomonas. The phosphate solubility of Bacillus aryabhattai B8W22 reached 388.62 μg mL−1. High‐performance liquid chromatographic analysis showed that each strain could secrete a large quantity of organic acids, including oxalic acid, malonic acid, citric acid and succinic acid. In addition, all strains produced indole acetic acid (IAA) and siderophores that could promote plant growth. Seed germination experiments testified that PSBs isolated in this study have an innate ability to promote plant growth. The plant culture pot experiment further illustrated that soil acid phosphatase (ACP) activity and available P content, as well as plant P uptake, increased significantly with PSBs inoculation. CONCLUSION PSBs from the rhizosphere soil of intercropped soybean could secrete organic acids that increase the solubilization of unavailable P, improve soil ACP activity and P availability, and produce IAA and siderophores that promote maize seed germination and seedling growth. Our findings indicate the PSBs from soybean rhizosphere have significant potential to reduce the application of chemical phosphate fertilizers and to promote sustainable agricultural development. © 2021 Society of Chemical Industry.

show abstract

Section: Discussionsupporting

confidence: 93%

Growth promotion ability of phosphate‐solubilizing bacteria from the soybean rhizosphere under maize–soybean intercropping systems

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The increment in total organic P under N additions was largely contributed by the substantial increase in moderate labile P o (Figure 1i), which represents organic P combining with Fe − and Al − in acid soil (Takahashi & Dahlgren, 2016), and is of great significance to the supply of available P in acid soils (Helfenstein et al, 2018; Margenot et al, 2017; Yang et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Eighteen‐year nitrogen addition does not increase plant phosphorus demand in a nitrogen‐saturated tropical forest

Chen

et al. 2023

Journal of Ecology

View full text Add to dashboard Cite

Nitrogen (N) deposition usually increases plant tissue N concentrations and thus phosphorus (P) demand in young and/or N‐limited forests, but the N deposition effect on plant P demand has rarely been assessed in N‐saturated forests. Impacts of 18‐year external N additions (Control: 0, Low N: 50, Moderate N:100 and High N: 150 kg N ha−1 year−1) on leaf P of four plant life‐forms (tree, shrub, herb and liana), P fractions of bulk and rhizosphere soils were examined in a N‐saturated mature tropical forest in southern China. Leaf N, P and N: P ratios of all plant life‐forms remained stable under three N additions. Among soil P fractions, moderate labile organic P increased by 25%–33% across three N additions; and soil total P was increased by 11.76% under Low N, and 8.87% under High N, compared with the control. The PLS‐PM results showed that path coefficient of microbial community to available P significantly increased and of inorganic P to available P significantly decreased under N additions than control. N additions improved soil P availability through microbe‐mediated P transformation: Low N significantly increased soil microbial taxonomic diversity, and a higher microbial diversity could enlarge the sources of nutrient acquisition and stimulate decomposition of recalcitrant organic matters; while High N significantly decreased soil microbial taxonomic diversity, the remaining microorganisms that were screened by N‐rich environments had the characteristics of resisting the N addition effects and maintained efficient P acquisition. Synthesis. Our findings provide a novel line of evidence that long‐term N deposition did not increase plant P demand in a N‐saturated mature tropical forest. The underlying mechanism is that plants did not increase N uptakes therefore nor increase P uptakes (a stable leaf N: P stoichiometry) in an already N‐saturated ecosystem. Different N addition rates regulated soil P transformation via microbial community transition. These findings help improve the understanding of plant P acquisition and modelling of biogeochemical N–P cycling and vegetation productivity in N‐rich forest ecosystems, particularly considering the fact that chronic N deposition may likely lead to soil N richness and even saturation of many forests in the future.

show abstract

“…This can be explained by the following mechanisms. First, the bacterialderived carbon may be sensitive to warm climates (Yang et al 2021). Second, compared to bacteria, fungi display greater stability (Fernandez et al 2016, Hu et al 2020, and the components in fungi that are di cult to degrade are more resistant to microbial decomposition.…”

Section: Discussionmentioning

confidence: 99%

Accumulation of microbial residuals and lignin phenols in forest soils along the latitude

Lin,

Tian,

Liao

et al. 2023

Preprint

View full text Add to dashboard Cite

Aims The carbon inputs from plant and microbial sources mainly govern the storage of soil organic carbon (SOC). However, how their relative contributions to SOC may vary along broad-scale environmental gradients is still poorly understood; the vertical distribution of these two carbon sources in soils is also elusive. Methods We selected amino sugar (microbial-derived carbon) and lignin phenol (plant-derived carbon) as biomarkers. The accumulation of amino sugar and lignin phenol in topsoil (0-10cm) and subsoil (30-50cm) of major forest types along latitude gradients in China was quantified. Results Our result showed that amino sugar concentrations decreased along latitude in topsoil. This was mainly influenced by annual mean temperature (MAT) and soil nitrogen (N). Lignin phenol concentrations decreased along latitude in topsoil, mainly influenced by soil C/N ratio. The soil amino sugar concentrations in topsoil were lower than those in subsoil, and the opposite was true for lignin phenols. In topsoil, the microbial-derived carbon was mainly composed of fungi-derived carbon, while in subsoil, bacteria-derived carbon dominated. Conclusions The microbial residues were mainly influenced by climate and soil properties. The lignin phenols were mainly controlled by soil properties. The controlling factors for microbial residues and lignin phenols in topsoil and subsoil are different. Our works have established a connection among climate, vegetation, and soil, revealing significant mechanisms for the vertical distribution of carbon sequestration along a latitude gradient.

show abstract

Decreases in soil P availability are associated with soil organic P declines following forest conversion in subtropical China

Cited by 29 publications

References 75 publications

Growth promotion ability of phosphate‐solubilizing bacteria from the soybean rhizosphere under maize–soybean intercropping systems

Growth promotion ability of phosphate‐solubilizing bacteria from the soybean rhizosphere under maize–soybean intercropping systems

Eighteen‐year nitrogen addition does not increase plant phosphorus demand in a nitrogen‐saturated tropical forest

Accumulation of microbial residuals and lignin phenols in forest soils along the latitude

Contact Info

Product

Resources

About