Allocation of foliar-P fractions of Alhagi sparsifolia and its relationship with soil-P fractions and soil properties in a hyperarid desert ecosystem

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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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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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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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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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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Phosphorus cycling and soil P fractions in Douglas-fir and red alder stands

Forest Ecology and Management ◽

10.1016/s0378-1127(98)00278-3 ◽

1998 ◽

Vol 110 (1-3) ◽

pp. 101-112 ◽

Cited By ~ 46

Author(s):

Jana E Compton ◽

Dale W Cole

Keyword(s):

Douglas Fir ◽

Phosphorus Cycling ◽

P Fractions ◽

Red Alder ◽

Soil P ◽

Soil P Fractions

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Soil-phosphorus fractions under 5 tropical agroecosystems on a volcanic soil

Soil Research ◽

10.1071/sr9950311 ◽

1995 ◽

Vol 33 (2) ◽

pp. 311 ◽

Cited By ~ 20

Author(s):

A Paniagua ◽

MJ Mazzarino ◽

D Kass ◽

L Szott ◽

C Fernandez

Keyword(s):

Management Practices ◽

Alley Cropping ◽

Extraction Procedure ◽

Organic P ◽

Volcanic Soil ◽

P Fertilization ◽

P Fractions ◽

Erythrina Poeppigiana ◽

Soil P ◽

Soil P Fractions

The organic P pool is usually considered a major source of available P in high P-fixing soils of the tropics. Agricultural management practices which maintain or increase soil organic P(o) contents would, therefore, help maintain soil fertility over time. The effects of organic additions and P fertilization on soil P fractions and yield of maize were examined after a 10 years rotation involving beans and maize on a tropical volcanic soil. Five maize cropping systems were analysed: (1) monoculture, alley cropping with Erythrina poeppigiana, alley cropping with Gliricidia sepium and monoculture mulched with E. poeppigiana prunings, all treatments fertilized with 20 kg P ha-1 and 54 kg K ha-1; and (2) monoculture mulched with E. poeppigiana prunings without fertilization. Soil P fractions were determined by a sequential extraction procedure. Little differences were found in size and distribution of P pools among treatments fertilized with P regardless of whether they received organic amendments. Mulching without P fertilization showed the lowest values of NaOH-Po (16% v. 22% of total P) and labile Pi, (2.4% v. 4.8%). These results suggest that (1) organic P accretion and mineralization is strongly dependent on inorganic fertilization; and (2) organic additions without synthetic fertilizers may be decreasing the organic P pool, and consequently the soil P fertility. Nevertheless, absolute values of labile Pi (resin+NaHCO3-Pi were quite high (52 mg kg-1) in this treatment, and yields of maize were among the highest obtained during most of the 10 years of cultivation.

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