Seasonal Variations and Thinning Effects on Soil Phosphorus Fractions in Larix principis-rupprechtii Mayr. Plantations

Thinning is a common management practice in forest ecosystems. However, understanding whether thinning treatment will change the availability of phosphorus (P) in soils, and the effect of thinning on the seasonal dynamics of soil P fractions, are still limited. The objective of the present study was to assess seasonal variations in soil P fractions under different forest thinning management strategies in a Larch (Larix spp.) plantation in northern China. To accomplish this, we examined soil P fractions, soil physical–chemical properties, and litter biomass under control (CK), light (LT), moderate (MT) and high thinning (HT) treatments. Data were collected during the growing season of 2017. We found that most P fractions varied seasonally at different soil depths, with the highest values occurring in the summer and autumn. When compared to CK, MT enhanced the inorganic P (Pi) concentration extracted by resin strip (R-Pi). Labile organic P (Labile Po), moderately labile P and total P (TP) also increased in both MT and HT treatments irrespective of season. In contrast, less-labile Pi and Po fractions were lower in LT than in CK, especially when examining deeper soil layers. Our results suggest that LT leads to a strong ability to utilize Po and less-labile Pi. Moreover, the effect of thinning did not tend to increase with thinning intensity, P availability was maximized at the MT. Ultimately, we show that MT can improve soil P bioavailability and is recommended in Larix principis-rupprechtii Mayr. plantations of North China. Our results emphasize that the effect of thinning management on soil microenvironment is an important basis for evaluating soil nutrients such as soil P bioavailability.

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Soil phosphorus fractions following annual paper mill biosolids and liming materials application

Canadian Journal of Soil Science ◽

10.4141/cjss09037 ◽

2010 ◽

Vol 90 (3) ◽

pp. 467-479 ◽

Cited By ~ 6

Author(s):

J -L. Fan ◽

N. Ziadi ◽

B. Gagnon ◽

Z -Y. Hu

Keyword(s):

Chemical Properties ◽

Paper Mill ◽

Wood Ash ◽

P Availability ◽

P Fractions ◽

Soil P ◽

Neutralization Capacity ◽

Soil P Fractions ◽

Lime Mud ◽

By Products

Industrial by-products such as paper mill biosolids (PB) and different liming materials have been used as fertilizers and amendments in agricultural soils for many decades. However, little is known about the effects of their repeated application on soil nutrient availability, particularly phosphorus (P). A 6-yr field study (2000-2005) was conducted in the province of Quebec to investigate the effect of repeated annual applications of different PB and industrial by-products on selected soil chemical properties, especially soil P fractions. Different PB rates (0 to 90 Mg wet ha-1) and several liming products (lime mud, wood ash, calcitic lime, and Mg by-products) were annually applied to field crops after seeding. Soils were sampled before seeding in May 2003 and at harvest in October 2005. Results showed that HCl-P was the largest P pool, accounting for about 64% of the total P fraction, and that the repeated applications of liming products significantly increased this pool and decreased the organic P pools. The NaOH-Po and residual-P were significantly lower in 2005 than in 2003, indicating that PB application without supplemental P fertilizer inputs enhanced the mobility and/or mineralization of NaOH-Po and the transformation of recalcitrant P to more labile forms with time. Lime mud (LM) was found to be the best liming material owing to its high neutralization capacity and positive effect on soil P availability over time. Key words: Paper mill biosolids, alkaline residuals, lime, wood ash, soil P fractions

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Soil phosphorus fractionation after co-applying biochar and paper mill biosolids

Canadian Journal of Soil Science ◽

10.1139/cjss-2020-0098 ◽

2020 ◽

Author(s):

Noura Ziadi ◽

Xiangru Zhang ◽

Bernard Gagnon ◽

Eric Manirakiza

Keyword(s):

Sandy Loam ◽

Paper Mill ◽

Phosphorus Fractionation ◽

Stable Form ◽

P Availability ◽

P Fractions ◽

Soil P ◽

Soil P Fractions ◽

Soil P Availability ◽

Incubation Study

In recent decades, there has been a growing interest in the recycling of organic materials such as paper mill biosolids (PB) and biochar for use as soil amendments. However, the benefits of co-application of PB and biochar and its effects on soil P availability remain unknown. An incubation study was conducted on two acidic soils to assess the effect of two PB types (2.5% w/w) co-applied with three rates (0%, 2.5%, and 5% w/w) of pine (Pinus strobus L.) biochar on soil P fractions. An unfertilized control and a mineral NP fertilizer were used as a reference. Soil P fractions were determined by Hedley procedure after 2 and 16 weeks of incubation. Material fractionation indicated that the PB containing the highest total P and the lowest Al content had the highest proportion of labile P, whereas most P in the biochar was in a stable form. The incubation study revealed that the P-rich PB increased P availability in both soils to a level comparable to mineral fertilizer at the end of the incubation. The addition of biochar to PB, however, did not affect soil P availability, but the highest rate induced a conversion of P fixed to Al and Fe oxides towards recalcitrant forms, particularly in the sandy loam soil. We conclude that co-applying biochar and PB could be more beneficial than application biochar alone and soils amended with such a mixture would be expected to release part of their P slowly over a longer period of time.

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Effect of Freeze–Thaw Cycles on Phosphorus Fractions and Their Availability in Biochar-Amended Mollisols of Northeast China (Laboratory Experiment)

Sustainability ◽

10.3390/su11041006 ◽

2019 ◽

Vol 11 (4) ◽

pp. 1006 ◽

Cited By ~ 1

Author(s):

Ying Han ◽

Xiangwei Chen ◽

Byoungkoo Choi

Keyword(s):

Moisture Content ◽

Path Coefficient ◽

P Availability ◽

P Fractions ◽

P Fractionation ◽

Soil P ◽

Freeze Thaw ◽

Soil P Fractions ◽

Labile P ◽

Biochar Amendment

Freeze–thaw cycles stimulate the release of available soil phosphorus (P) in winter, and biochar as a soil amendment could improve P availability. Nevertheless, it is unclear how freeze–thaw cycles and biochar amendment interact to affect the soil P fractions and their availability in winter, particularly under different soil water conditions. We simulateda freeze–thaw cycle experimentto assess the effects of three factors on soil P fractions: soil moisture content (22%, 31%, and 45%), frequencies of freeze–thaw cycles (0, 1, 3, 6, and 12 times) and biochar amendment (soil and biochar-amended soil). Modified Hedley sequential P fractionation was conducted to measure the soil P fractions. Increasing the number of freeze–thaw cycles increased soil labile P fractions in the soil with the lowest moisture content (22%). After biochar amendment, the content of labile P decreased as the number of freeze–thaw cycles increased. Biochar amendment enhanced P availability in Mollisols owing to the direct effect of NaOH-Po, which has a large direct path coefficient. Principal components analysis showed that moisture content was a major factor influencing the variation in the P fractions. The P fractions were separated by the interactive effects of biochar amendment and freeze–thaw cycles in soils with a higher moisture content (45%), indicating that the effects of freeze–thaw cycles on P availability appear to be more pronounced in biochar-amended Mollisols of higher water contents.

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Improved Plant Diversity as a Strategy to Increase Available Soil Phosphorus

10.24047/bc103143 ◽

2019 ◽

Vol 103 (1) ◽

pp. 43-45 ◽

Cited By ~ 1

Author(s):

Carlos Crusciol ◽

João Rigon ◽

Juliano Calonego ◽

Rogério Soratto

Keyword(s):

Crop Yields ◽

Soil Phosphorus ◽

Cropping System ◽

P Availability ◽

P Fractions ◽

Crop Species ◽

Soil P ◽

Residue Decomposition ◽

Available Soil Phosphorus ◽

Crop Residue Decomposition

Some crop species could be used inside a cropping system as part of a strategy to increase soil P availability due to their capacity to recycle P and shift the equilibrium between soil P fractions to benefit the main crop. The release of P by crop residue decomposition, and mobilization and uptake of otherwise recalcitrant P are important mechanisms capable of increasing P availability and crop yields.

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Assessing soil P fractions changes with long‐term phosphorus fertilization related to crop yield of soybean and maize

Soil Use and Management ◽

10.1111/sum.12581 ◽

2020 ◽

Vol 36 (3) ◽

pp. 524-535 ◽

Cited By ~ 3

Author(s):

Stefania C. Appelhans ◽

Pedro Anibal Barbagelata ◽

Ricardo Jose Miguel Melchiori ◽

Flavio Gutierrez Boem

Keyword(s):

Crop Yield ◽

Phosphorus Fertilization ◽

P Fractions ◽

Soil P ◽

Soil P Fractions

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Dynamics of phosphorus fractions in soils treated with dairy manure

Soil Research ◽

10.1071/sr18325 ◽

2020 ◽

Vol 58 (3) ◽

pp. 289

Author(s):

L. B. Braos ◽

A. C. T. Bettiol ◽

L. G. Di Santo ◽

M. E. Ferreira ◽

M. C. P. Cruz

Keyword(s):

P Uptake ◽

Dairy Manure ◽

P Availability ◽

Organic P ◽

Triple Superphosphate ◽

P Fractions ◽

Inorganic P ◽

Soil P ◽

Plant P Uptake ◽

Inorganic P Fractions

The evaluation of phosphorus (P) transformations in soil after application of manure or mineral P can improve soil management and optimise P use by plants. The objectives of the present study were to assess organic and inorganic P forms in two soils treated with dairy manure and triple superphosphate and to establish relationships between soil P fraction levels and P availability. Soil organic and inorganic P fractions were quantified using a pot experiment with two soils, a typical Hapludox and an arenic Hapludult, with three types of fertiliser treatments applied (no fertiliser application, application of dairy manure, and application of triple superphosphate, by adding 100 mg P dm–3 in the form of fertiliser in the two latter treatments) and four incubation times (15, 45, 90, and 180 days). Inorganic P was fractionated into aluminium-bound, iron-bound, occluded, and calcium-bound P. Organic P was extracted sequentially using sodium bicarbonate, hydrochloric acid, microbial biomass, sodium hydroxide, and residual organic P. After incubation, maize plants were cropped to quantify dry matter yield and absorbed P. Application of dairy manure resulted in a significant increase in most of the organic P fractions, and application of triple superphosphate led to a significant increase in inorganic P fractions. Both fertilisers raised labile organic P fractions in the two soils. The major sinks of P in Hapludox were occluded and fulvic acid-associated P. In contrast, the major sink of P in Hapludult was iron-bound P. The available P levels were stable after application of dairy manure, and decreased with time when fertilised with triple superphosphate. In the Hapludox, the organic P fractions had a significant positive correlation with P uptake by plants. The results suggest that organic P mineralisation plays a more significant role in plant P uptake in the Hapludox soil and inorganic P forms are the main contributors to plant P uptake in the Hapludult soil.

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

Agronomy ◽

10.3390/agronomy9120784 ◽

2019 ◽

Vol 9 (12) ◽

pp. 784 ◽

Cited By ~ 4

Author(s):

Waqas Ahmed ◽

Kailou Liu ◽

Muhammad Qaswar ◽

Jing Huang ◽

Qinghai Huang ◽

...

Keyword(s):

Grain Yield ◽

Paddy Soils ◽

P Fractions ◽

Mineral Fertilization ◽

Mineral N ◽

Soil P ◽

Soil P Fractions ◽

Use Efficiency ◽

Labile P

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., NaHCO3-Pi and NaHCO3-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 (R2 = 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 and the mechanisms governing the interactions between plants and soil nutrients are clearly explained in this study.

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Management Practices Influenced Corn Grain Yield and Soil Chemical Properties

10.5194/egusphere-egu2020-116 ◽

2020 ◽

Author(s):

Maysoon Mikha ◽

Alan Schlegel

Keyword(s):

Soil Nutrients ◽

Management Practices ◽

Chemical Properties ◽

Soil Chemical Properties ◽

Corn Yield ◽

P Availability ◽

Soil P ◽

Residue Removal ◽

Synthetic Fertilizer ◽

Nitrogen Treatments

<p>Land sustainability could be influenced by management decisions, soil nutrients content, and soil erosion potential. This study evaluates the management that consist on two sources of nitrogen (cattle beef manure, M; and synthetic fertilizer, F) and two levels of residue removal (0% and 80%) on corn yield and soil chemical properties in a no-tillage irrigated field. The study was initiated in 2011 in Tribune, Kansas where the nitrogen treatments and residue removal were organized in randomized strip design with four replications. After Seven years of annual M addition, corn yield and soil chemical properties significantly increased compared with synthetic fertilizer. Annual residue removal at 80% level greatly reduced soil chemical properties measured especially STN, SOC, and soil P availability for subsequent crops. Residue removal at 80% show a potential to decrease soil EC compared with 0% removal, but the EC reduction was not significant. The data generated from this study shows that soil nutrients content was reduced with removing the residue even in irrigated and well fertilized field unless organic amendment was accompanied the residue removal practice.</p>

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Identification of soil P fractions that are associated with P loss from surface runoff under various cropping systems and fertilizer rates on sloped farmland

PLoS ONE ◽

10.1371/journal.pone.0179275 ◽

2017 ◽

Vol 12 (6) ◽

pp. e0179275 ◽

Cited By ~ 2

Author(s):

Xinghua Li ◽

Baona Wang ◽

Tewu Yang ◽

Duanwei Zhu ◽

Zhongnan Nie ◽

...

Keyword(s):

Surface Runoff ◽

Cropping Systems ◽

P Fractions ◽

Soil P ◽

Soil P Fractions ◽

P Loss ◽

Fertilizer Rates

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Consequences of Ontario P index recommendations for reduced manure and fertilizer phosphorus applications on corn yields and soil phosphorus

Canadian Journal of Soil Science ◽

10.1139/cjss-2015-0072 ◽

2016 ◽

Vol 96 (2) ◽

pp. 191-198 ◽

Cited By ~ 2

Author(s):

M.A. Ribey ◽

I.P. O’Halloran

Keyword(s):

Crop Production ◽

P Fractions ◽

Environmental Indices ◽

P Fractionation ◽

Soil P ◽

Olsen P ◽

Soil P Fractions ◽

Application Rates ◽

P Index ◽

The Impact

Environmental indices for soil P limit P applications when soil tests and risk of P losses exceed a given threshold. Producers’ reluctance to reduce P inputs often stem from concerns regarding reduced crop production and soil fertility. Our objectives were to identify changes in soil P fractions after 4 yr of repeated manure or fertilizer P applications at rates ≤ crop removal by corn (Zea mays L.), and the impact of these applications on yields. Olsen P and soil P fractions extracted using a modified Hedley P fractionation procedure were measured. Corn yields were nonresponsive to P applications. After 4 yr, Olsen P was 16.6 and 24.6 mg kg−1 at the application rates of 0 and 33 kg P ha−1 yr−1, respectively, for the inorganic fertilizer treatment indicating that soil P drawdown was occurring. Only the most labile forms of Pi (resin and bicarbonate extractable) were affected by treatment, with greater values at higher P application rates. Adherence to Ontario’s P index recommendations for P applications at or below crop removal should not be a crop production concern. Furthermore, given the rate of soil labile P drawdown, routine soil testing (every 3–5 yr) would identify agronomically significant changes in soil test P before the crop yield is impacted.

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