Decreased soil organic P fraction associated with ectomycorrhizal fungal activity to meet increased P demand under N application in a subtropical forest ecosystem

Fan, Yuexin; Lin, Fu‐Cheng; Yang, Liuming; Zhong, Xuhua; Wang, Minhuang; Zhou, Junyi; Chen, Yuehmin; Yang, Yusheng

doi:10.1007/s00374-017-1251-8

Cited by 85 publications

(51 citation statements)

References 71 publications

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“…In contrast to N, our results show that P acquiring enzyme activity was high while NAG/AP and C enz /AP were low across all treatments at both the high and low elevation sites. Compared with temperate forests, our findings are in line with P being a generally more limiting to plant growth in subtropical forests (Fan et al, ; Sinsabaugh et al, ). The higher AP‐tase activity and lower NAG/AP‐tase and C enz /AP‐tase at the low elevation site suggest a high microbial investment in P acquisition.…”

Section: Discussionsupporting

confidence: 88%

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Litter quality and site characteristics interact to affect the response of priming effect to temperature in subtropical forests

et al. 2019

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Forest litter inputs to soil can stimulate the decomposition of older soil organic matter (SOM) via a priming effect (PE). The magnitude and underlying mechanisms driving PE are poorly understood, with especially little know about how litter quality and site conditions affect PE in situ. Further, very few studies have examined PE in tropical and subtropical soils. Here, we established low and high elevation sites (600 vs. 1,400 m a.s.l.) in the subtropical Wuyishan National Park, China, that differed with respect to mean annual temperature (MAT; ∆MAT = 4.2°C), vegetation, soil texture and soil moisture. We conducted a 1‐year field incubation study at these two sites to compare PE induced by adding low‐ and high‐quality 13C‐labelled leaf litter to soils. At the low elevation site, additions of high‐quality (low C/N) litter caused a PE that was 140% greater than the PE observed following additions of low‐quality (high C/N) litter. In contrast, we saw no significant differences in PE between litter types at the high elevation site, perhaps because PE was not limited by substrate quality at this cooler, finer textured and higher soil moisture coniferous site. In addition, we found a negative relationship between home‐field advantage (HFA) for litter decomposition and PE, indicating that specialized litter decomposer community driving HFA may not accelerate SOM decomposition via PE in the same way. In line with our observed strong relationship between PE and the efficiency of priming (PE size per unit of mineralized litter C), PEs induced by the high‐ and low‐quality litters were directed to microbial phosphorus (P) mining rather than nitrogen (N) mining. This interpretation aligns with observed increases in the activity of P acquiring extracellular enzymes, often described as phosphatases (P‐tases), as well as the positive relationship between the PE, P‐tase activity and the activity of C acquiring extracellular enzymes. Overall, this PE study across two contrasting sites highlights the important role of site characteristics and litter quality in regulating PE size. Further, we suggest that MAT may be a dominant driver of soil priming, through both the direct effects of litter quantity on labile substrate supply and the indirect effects of litter quality changes on downstream decomposer communities. A free Plain Language Summary can be found within the Supporting Information of this article.

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Section: Discussionsupporting

confidence: 88%

“…Available P was determined according to the Mehlich‐3 method (Carter & Gregorich, ). Details of the methods are further described in Fan et al ().…”

Section: Methodsmentioning

confidence: 99%

Litter quality and site characteristics interact to affect the response of priming effect to temperature in subtropical forests

et al. 2019

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“…These results generally agree with the previous study of Siddique and Robinson and Song et al [43,44] who observed that long-term crop cultivation without any fertilizer input resulted in a decreased labile P content in the soil. The changes in labile and moderately labile P pools could be due to the organic P mineralization that allows the inorganic P to be utilized by the ectomycorrhizal fungi [45,46]. The changes might also because of the elevated SOM contents in the soil with HNPK additions which could affect P-sorption sites, either by creating a cover over iron and aluminum sorption spots to cease the added or the applied P from fixation/adsorption or by modifying the mineral surface charges that also reduce the sorption sites, eventually increasing the soil phosphorus [47].…”

Section: Relationship Of Soil Properties and P Fractions With Npk Addmentioning

confidence: 99%

Long-Term Mineral Fertilization Improved the Grain Yield and Phosphorus Use Efficiency by Changing Soil P Fractions in Ferralic Cambisol

et al. 2019

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Elevated mineral fertilization may change the composition and increase the availability of soil phosphorus (P) in subtropical paddy soils and thus affect long-term plant growth. However, an understanding of the response of soil P fractions to long-term nitrogen, phosphorus and potassium (NPK) additions remains elusive. This study aimed to explore the responses of soil P-fractions and their mobility to different long-term chemical fertilization rates under a double rice cropping system. The rates of nitrogen (N), phosphorus (P), and potassium (K) in the low NPK treatment (LNPK) were 90, 45, and 75 kg ha −1 year −1 , respectively, and in the high NPK treatment (HNPK), they were 180, 90, and 150 kg ha −1 year −1 , respectively. The results showed that the concentrations of soil organic matter (SOM), total P, Olsen P, total N, and mineral N were remarkably increased under HNPK by 17.46%, 162.66%, 721.16%, 104.42%, and 414.46%, respectively, compared with those under control (CT). Compared to the CT P fractions, HNPK increased the labile P fractions (i.e., NaHCO 3 -Pi and NaHCO 3 -Po) by 322.25% and 83.53% and the moderately labile P fractions (i.e., NaOH-Pi, NaOH-Po and HCl. dil. Pi) by 163.54%, 183.78%, and 3167.25% respectively, while the non-labile P was decreased by the HNPK addition. P uptake and grain yield were increased by LNPK and HNPK by 10.02% and 35.20%, respectively, compared with CT. P use efficiency indices were also higher under HNPK than under LNPK. There was a strong positive relationship between grain yield and P use efficiency (R 2 = 0.97). A redundancy analysis (RDA) showed a strong correlation between soil chemical properties and the labile and moderately labile P pools. Structural equation modeling (SEM) revealed that SOM, mineral N, and available P strongly control the labile P pool. In conclusion, NPK additions under the paddy soils significantly influences the soil P fractions. The soil P dynamics Agronomy 2019, 9, 784 2 of 15 and the mechanisms governing the interactions between plants and soil nutrients are clearly explained in this study.

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“…Mean annual temperature, potential evapotranspiration, and relative humidity in this region were 18.7 • C, 1585 mm, and 79%, respectively [31]. Regional soils are Oxisols, formed from sandstone (based on the United States Department of Agriculture Soil Taxonomy), and are about 30-70 cm deep [32].…”

Section: Study Sitementioning

confidence: 91%

“…However, a recent meta-analysis by Zhou et al [54] revealed that a decrease in microbial biomass is not always associated with N addition suppressing microbial activity. Interestingly, the companion study reported that the C:N:P stoichiometry in microbial biomass was significantly altered in the HN treatments and enhanced microbial P limitation [32]. Additionally, high N addition significantly reduced soil pH.…”

Section: Microbial Community and Carbon Structure Under N Additionmentioning

confidence: 98%

Nitrogen Addition Affects Soil Respiration Primarily through Changes in Microbial Community Structure and Biomass in a Subtropical Natural Forest

Zhou

Liu

Xie

et al. 2019

Forests

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Forest soil respiration plays an important role in global carbon (C) cycling. Owing to the high degree of C and nitrogen (N) cycle coupling, N deposition rates may greatly influence forest soil respiration, and possibly even global C cycling. Soil microbes play a crucial role in regulating the biosphere–atmosphere C exchange; however, how microbes respond to N addition remains uncertain. To better understand this process, the experiment was performed in the Castanopsis kawakamii Hayata Nature Reserve, in the subtropical zone of China. Treatments involved applying different levels of N (0, 40, and 80 kg ha−2 year−1) over a three-year period (January 2013–December 2015) to explore how soil physicochemical properties, respiration rate, phospholipid fatty acid (PLFA) concentration, and solid state 13C nuclear magnetic resonance responded to various N addition rate. Results showed that high levels of N addition significantly decreased soil respiration; however, low levels of N addition significantly increased soil respiration. High levels of N reduced soil pH and enhanced P and C co-limitation of microorganisms, leading to significant reductions in total PLFA and changes in the structure of microbial communities. Significant linear relationships were observed between annual cumulative respiration and the concentration of microbial biomass (total PLFA, gram-positive bacteria (G+), gram-negative bacteria (G−), total bacteria, and fungi) and the microbial community structure (G+: G− ratio). Taken together, increasing N deposition changed microbial community structure and suppressed microbial biomass, ultimately leading to recalcitrant C accumulation and soil C emissions decrease in subtropical forest.

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Decreased soil organic P fraction associated with ectomycorrhizal fungal activity to meet increased P demand under N application in a subtropical forest ecosystem

Cited by 85 publications

References 71 publications

Litter quality and site characteristics interact to affect the response of priming effect to temperature in subtropical forests

Litter quality and site characteristics interact to affect the response of priming effect to temperature in subtropical forests

Long-Term Mineral Fertilization Improved the Grain Yield and Phosphorus Use Efficiency by Changing Soil P Fractions in Ferralic Cambisol

Nitrogen Addition Affects Soil Respiration Primarily through Changes in Microbial Community Structure and Biomass in a Subtropical Natural Forest

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