scholarly journals Unravelling the Role of Rhizosphere Microbiome and Root Traits in Organic Phosphorus Mobilization for Sustainable Phosphorus Fertilization. A Review

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2267
Author(s):  
Issifou Amadou ◽  
David Houben ◽  
Michel-Pierre Faucon
Keyword(s):  
Plant Traits ◽  
Organic Phosphorus ◽  
Cropping Systems ◽  
Root Traits ◽  
Soil Microbiome ◽  
Phosphorus Fertilization ◽  
P Availability ◽  
Organic Input ◽  
Rhizosphere Microbiome ◽  
P Fertilizer

Moving toward more sustainable sources for managing phosphorus (P) nutrition in agroecosystems, organic phosphorus (Po) derived from organic inputs and soil is increasingly considered to complement mineral P fertilizer. However, the dynamics of P added by organic input in soil-plant systems is still poorly understood and there is currently no clear information on how the Po composition of these amendments determines P availability through interactions with the soil microbiome and root traits. Here, we review the main mechanisms of rhizosphere microbiome and root traits governing the dynamics of organic input/soil-derived Po pools in the soil-plant system. We discuss the extent to which the major forms of Po derived from organic input/soil can be used by plants and how this could be improved to provide efficient utilization of organic inputs as potential P sources. We provide new insights into how a better understanding of the interactions between Po forms, root traits, and rhizosphere microbiomes can help better manage P fertilization, and discuss recent advances in the mobilization and recovery of Po from organic inputs. We then develop proposed strategies in agroecology that could be used to improve Po utilization, specifically by better linking plant traits and Po forms, and developing new cropping systems allowing more efficient Po recycling.

Microbial necromass shaped plant traits in a warmer condition

2020 ◽  
Author(s):  
Wioleta Stelmach-Kardel ◽  
Magdalena Frąc ◽  
Agata Gryta ◽  
Bahar S. Razavi
Keyword(s):  
Plant Traits ◽  
Plant Biomass ◽  
Root Exudation ◽  
Root Hairs ◽  
Available P ◽  
Soil Microbiome ◽  
P Availability ◽  
Kinetics Parameters ◽  
Mutant Type ◽  
P Recycling

<p>Among many factors controlling root exudation, root hairs proliferation and warming have strong influence on exudate release as well as microbial substrate utilization and enzyme activities. Thus, the interactions of these two factors are important but least known in the rhizosphere. Phosphorus (P) is the most important growth limiting nutrient in soils. Concerns about a depleting supply of P as fertilizer has boosted research efforts on understanding P cycling and fluxes, as a breakdown of P availability would have disastrous global consequences. Efficient P recycling in temperate ecosystems provides an excellent possibility to study all kind of biogeochemical P transformations – those mobilizing low available P species and those recycling available P – maintaining a high level of microbial biomass P in the ecosystem. Such microbial cycling has been successfully shown for individual C compounds or within compound classes. P recycling, especially within microbial communities, has not been investigated so far. Microbial necromass as a source of available C and N affect microbial P utilization. However, the mechanisms underlying this alteration of biogeochemical transformations within the P cycle are not understood. To clarify these interactions for 21 days, rhizoboxes with Maize wildtype and mutant (rth3, no root hairs) under 20 and 30 °C, with and without necromass addition were incubated. The spatial distribution of acid phosphatase was assessed with MUF-based Zymography. Phosphatase activity as well as enzyme kinetics parameters (Vmax and Km) were determined in bulk and rhizosphere soil of all treatments. <br>Our result showed that necromass addition accelerated microbial activity and phosphates hotspots at high temperature ranges. Necromass had no influence on rhizosphere size but increased hotspots independent of temperature. In treatment without necromass amendment, root-hairs effects on enzyme activity and efficiency was pronounced only at elevated temperature. Necromass addition caused formation of roots with special morphology comparable to root hairs in mutant type (hairless root). This was plant strategy to compensate P limitation and acquire more P under competition with soil microbiome. Consequently, P content in plant biomass after changes of root morphology increased while MBP decreased. This, shows that microbial necromass was decomposed and used as a source of P by plant. Thus, plant by adaptation of their morphology over compete microorganisms for more efficient P uptake.</p>

scholarly journals Phosphorus sources and fractions in an oxisol under no-tilled soybean

2008 ◽  
Vol 65 (4) ◽  
pp. 415-421 ◽  
Author(s):  
Raquel Galvani ◽  
Luiz Fernando Keyti Hotta ◽  
Ciro Antonio Rosolem
Keyword(s):  
Organic Phosphorus ◽  
Control Sample ◽  
Soybean Seed ◽  
Soil Surface ◽  
Phosphorus Fertilization ◽  
Plant Residues ◽  
P Availability ◽  
No Till ◽  
Phosphorus Sources ◽  
P Sources

Phosphorus dynamics in soil can be modified by the use of no-till systems. Brazilian farmers have applied phosphorus fertilizers onto the soil surface to optimize machine field operations despite the lack of research supporting this practice. An experiment was conducted to study the effects of the application of two P sources onto soil surface and soybean seed furrows. The treatments consisted either of the application or not of 80 kg ha-1 of total P2O5 as natural reactive rock phosphate and superphosphate spread on the soil surface over the standing plant residues. At soybean planting, additional treatments (80 kg ha-1 of Natural Phosphate or Superphosphate) were applied at seed furrows. Soil was sampled down to 40 cm deep before soybean planting and after harvest. A control sample was taken from an adjacent non-cropped area. Phosphorus contents increased down to 40 cm after the soybean crop, and the increase was observed mainly in Ca-bound P and organic phosphorus. However, there was a decrease in Fe-bound P, showing that P availability to soybeans was likely related also to this fraction. Phosphorus fertilization with both phosphates decreased occluded P contents on the soil surface layer when compared with the non-cropped area.

scholarly journals PHOSPHORUS FERTILIZATION AND HARVEST INTERVALS INFLUENCE ENERGETIC AND PHYSICAL PROPERTIES OF BRIQUETTES AND LARGE BRANCHES OF MATE

2017 ◽  
Vol 41 (1) ◽  
Author(s):  
Delmar Santin ◽  
Marcelino Breguez Gonçalves Sobrinho ◽  
Angélica de Cássia Oliveira Carneiro ◽  
Eliziane Luiza Benedetti ◽  
Nairam Félix de Barros
Keyword(s):  
Physical Properties ◽  
Basic Density ◽  
Calorific Value ◽  
Average Diameter ◽  
Plant Residue ◽  
Phosphorus Fertilization ◽  
P Availability ◽  
Gross Calorific Value ◽  
Energetic Properties ◽  
Harvest Intervals

ABSTRACT In mate crop, the commercial part consists of leaves and thin branches, while the large branches (LB) are considered unused residues and left in the field, although they may have potential for use as energy. The objective of this paper was to evaluate the influence of phosphorus fertilization and harvest interval in productivity of mate large branches and in their physical and energetic properties, as well as in derived briquettes. In a seven-year-old plantation, doses of 0, 20, 40, 80, 160 and 320 kg.ha-1 of P2O5 were applied considering harvest intervals of 12, 18 and 24 months. Dry mass, average diameter, P content, and physical and energetic properties of LB were determined. With LB, after its transformation into particles and briquetting, physical and energetic properties were determined, as well as P availability in soil. The phosphorus fertilization increased LB productivity in larger harvest intervals, increasing the amount of energy produced per unit of area, but did not change basic density and gross calorific value of wood. Mate harvest intervals did not affect the apparent density and calorific value of briquettes produced by LB. LB harvested at intervals of 18 and 24 months produced wood with higher basic density and gross calorific value. LB or briquettes have adequate energetic and physical properties, being technically a plant residue with great potential for use as energy.

Overwinter changes in Olsen phosphorus in a 24-year crop rotation study in southwestern Saskatchewan

1993 ◽  
Vol 73 (1) ◽  
pp. 123-128 ◽  
Author(s):  
C. A. Campbell ◽  
R. P. Zentner
Keyword(s):  
Cropping Systems ◽  
Soil Testing ◽  
Available Phosphorus ◽  
Canadian Prairie ◽  
Olsen P ◽  
Extractable P ◽  
P Fertilizer ◽  
Soil Test P ◽  
Nutrient Analyses ◽  
Rotation Study

In the Canadian prairie, producers generally sample soils in the autumn for nutrient analyses, whereas calibration of crop responses has been made based on soils sampled in the spring prior to seeding. A recent report suggests that available phosphorus (P) in soil increases between autumn and spring. At Swift Current, Saskatchewan, we have monitored bicarbonate-extractable P (Olsen P) every autumn and spring for the past 24 years, in four cropping systems: continuous wheat (Cont W), fallow-wheat (F-W), and two fallow-wheat-wheat (F-W-W) rotations. The first three systems received nitrogen (N) and P each crop year, with one F-W-W rotation receiving only N. These data were analyzed to test the authenticity of the aforementioned observations. We found that although there were some apparent overwinter increases in Olsen P there were also some decreases. Further, because of the considerable variability in Olsen P, relatively few of the overwinter changes were significant (P = 0.10). Efforts to correlate the changes in Olsen P to overwinter temperature or precipitation were unsuccessful. We concluded that Saskatchewan soil testing laboratories need not make adjustments to P fertilizer recommendations to account for changes in overwinter soil test P levels. Key words: Soil testing, bicarbonate-extractable P, crop rotations, available P

scholarly journals Impact of Cover Crops on the Soil Microbiome of Tree Crops

2020 ◽  
Vol 8 (3) ◽  
pp. 328 ◽  
Author(s):  
Antonio Castellano-Hinojosa ◽  
Sarah L. Strauss
Keyword(s):  
Cover Crops ◽  
Sustainable Management ◽  
Crop Production ◽  
Production Systems ◽  
Cropping Systems ◽  
Soil Nutrient ◽  
Conventional Tillage ◽  
Soil Microbiome ◽  
Nitrogen And Phosphorus ◽  
Tree Crops

Increased concerns associated with interactions between herbicides, inorganic fertilizers, soil nutrient availability, and plant phytotoxicity in perennial tree crop production systems have renewed interest in the use of cover crops in the inter-row middles or between trees as an alternative sustainable management strategy for these systems. Although interactions between the soil microbiome and cover crops have been examined for annual cropping systems, there are critical differences in management and growth in perennial cropping systems that can influence the soil microbiome and, therefore, the response to cover crops. Here, we discuss the importance of cover crops in tree cropping systems using multispecies cover crop mixtures and minimum tillage and no-tillage to not only enhance the soil microbiome but also carbon, nitrogen, and phosphorus cycling compared to monocropping, conventional tillage, and inorganic fertilization. We also identify potentially important taxa and research gaps that need to be addressed to facilitate assessments of the relationships between cover crops, soil microbes, and the health of tree crops. Additional evaluations of the interactions between the soil microbiome, cover crops, nutrient cycling, and tree performance will allow for more effective and sustainable management of perennial cropping systems.

scholarly journals Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
C. Nobile ◽  
D. Houben ◽  
E. Michel ◽  
S. Firmin ◽  
H. Lambers ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Specific Root Length ◽  
Cropping System ◽  
Root Traits ◽  
Sewage Sludges ◽  
P Acquisition ◽  
Acquisition Strategies ◽  
P Content ◽  
P Fertilizer ◽  
Available Soil Phosphorus

Abstract Crops have different strategies to acquire poorly-available soil phosphorus (P) which are dependent on their architectural, morphological, and physiological root traits, but their capacity to enhance P acquisition varies with the type of fertilizer applied. The objective of this study was to examine how P-acquisition strategies of three main crops are affected by the application of sewage sludges, compared with a mineral P fertilizer. We carried out a 3-months greenhouse pot experiment and compared the response of P-acquisition traits among wheat, barley and canola in a soil amended with three sludges or a mineral P fertilizer. Results showed that the P-acquisition strategy differed among crops. Compared with canola, wheat and barley had a higher specific root length and a greater root carboxylate release and they acquired as much P from sludge as from mineral P. By contrast, canola shoot P content was greater with sludge than with mineral P. This was attributed to a higher root-released acid phosphatase activity which promoted the mineralization of sludge-derived P-organic. This study showed that contrasted P-acquisition strategies of crops allows increased use of renewable P resources by optimizing combinations of crop and the type of P fertilizer applied within the cropping system.

scholarly journals Medicago sativa has Reduced Biomass and Nodulation When Grown with Soil Microbiomes Conditioned to High Phosphorus Inputs

2018 ◽  
Vol 2 (4) ◽  
pp. 237-248 ◽  
Author(s):  
Laura M. Kaminsky ◽  
Grant L. Thompson ◽  
Ryan V. Trexler ◽  
Terrence H. Bell ◽  
Jenny Kao-Kniffin
Keyword(s):  
Plant Growth ◽  
Medicago Sativa ◽  
Organic Phosphorus ◽  
Hydrolytic Enzyme ◽  
Microbial Interactions ◽  
Soil Microbiome ◽  
Inorganic P ◽  
Nutrient Regime ◽  
Functional Changes ◽  
Microbiome Composition

Agricultural over-fertilization may adversely impact plant−microbial interactions affecting crop yield. It is unclear if soil microbiomes respond quickly to changes in fertilizer inputs once conditioned to specific nutrient regimes. We conducted a growth chamber study assessing the compositional and functional resilience of root-associated microbiomes of Medicago sativa to nutrient regime changes, and consequences for plant growth. Plants were grown with a common starting soil microbiome under four nutrient treatments: control (no fertilizer), organic phosphorus (compost added), low inorganic P (low triple superphosphate, TSP) and high inorganic P (high TSP). After several conditioning generations, in which microbiomes from rhizospheres of high biomass plants were transferred forward, microbiome composition was distinct across the four treatments. The resulting microbiomes were then transplanted into each of the nutrient treatments, leading generally to functional changes in hydrolytic enzyme activity and taxonomic convergence with other microbiomes transplanted into the same nutrient regime. However, high inorganic P-conditioned microbiomes were resistant to compositional change. Correspondingly, M. sativa grown with high inorganic P-conditioned microbiomes had lower biomass, fewer nodules, and lower %N than plants grown under the same nutrient regime with other microbiomes. These findings suggest that excessive inorganic P fertilization may change microbiomes such that they negatively affect plant growth.

scholarly journals Lettuce Response to Phosphorus Fertilization with Struvite Recovered from Municipal Wastewater

HortScience ◽  
2009 ◽  
Vol 44 (2) ◽  
pp. 426-430 ◽  
Author(s):  
Ricardo González-Ponce ◽  
Esther G. López-de-Sá ◽  
César Plaza
Keyword(s):  
Phosphate Rock ◽  
Municipal Wastewater ◽  
P Uptake ◽  
Environmental Benefits ◽  
Phosphorus Fertilization ◽  
Single Superphosphate ◽  
Loamy Sand Soil ◽  
P Fertilizer ◽  
P Rate ◽  
Spanish Research

Struvite (MgNH4PO4·6H2O) production is widely studied as a way to remove phosphorus (P) from wastewater and generate a potentially marketable P fertilizer, but its effects on crops have yet to be researched more thoroughly. This study was conducted to evaluate struvite recovered by the Spanish Research Council (CSIC) pilot process (STR) as a source of P for lettuce (Lactuca sativa L.) by comparing its effectiveness with that of single superphosphate (SUP), a common P fertilizer derived from phosphate rock. In a greenhouse pot experiment, a P-deficient loamy sand soil was amended with either SUP or STR at P rates of 0, 4, 8, 12, 16, and 20 mg·kg−1. Nitrogen and potassium were uniformly supplied to all treatments. The response of lettuce head fresh weight and P uptake to P rate exhibited statistically significant quadratic relationships for both SUP and STR. With respect to SUP, STR was significantly more effective in increasing lettuce yield and P uptake, probably because of the larger amount of magnesium (Mg) incorporated with this material and a synergistic effect on P uptake. This work supports previous findings based on other test crops in suggesting that STR can be a P source attractive to the fertilizer market with additional agronomic and environmental benefits such as providing available Mg and nitrogen, helping attenuate consumption of phosphate rock, and reducing release of P by discharge of treated wastewaters to surface and groundwater systems.

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