Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil

Soratto, Rogério Peres; Sandaña, Patricio; Fernandes, Adalton Mazetti; Martins, Jéssyca Dellinhares Lopes; Job, André Luiz Gomes

doi:10.1016/j.eja.2020.126020

Cited by 16 publications

(11 citation statements)

References 43 publications

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“…In other words, the spurious correlation between the C i and M variables may lead to misleading observed exponents. For example, prior work has reported an

N \propto M^{- 0.33}

scaling relationship primarily from crop species (Ågren, 2008; Huang et al ., 2018; Gómez et al ., 2019; Soratto et al ., 2020). Thus, the spurious correlation problem is pervasive but often overlooked in elemental stoichiometry, which is one of the key reasons why some empirical evidence supports the third‐power scaling laws.…”

Section: Discussionmentioning

confidence: 99%

The scaling of elemental stoichiometry and growth rate over the course of bamboo ontogeny

Ouyang,

Tian,

Niklas

et al. 2023

New Phytologist

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Summary Stoichiometric rules may explain the allometric scaling among biological traits and body size, a fundamental law of nature. However, testing the scaling of elemental stoichiometry and growth to size over the course of plant ontogeny is challenging. Here, we used a fast‐growing bamboo species to examine how the concentrations and contents of carbon (C), nitrogen (N) and phosphorus (P), relative growth rate (G), and nutrient productivity scale with whole‐plant mass (M) at the culm elongation and maturation stages. The whole‐plant C content vs M and N content vs P content scaled isometrically, and the N or P content vs M scaled as a general 3/4 power function across both growth stages. The scaling exponents of G vs M and N (and P) productivity in newly grown mass vs M relationships across the whole growth stages decreased as a −1 power function. These findings reveal the previously undocumented generality of stoichiometric allometries over the course of plant ontogeny and provide new insights for understanding the origin of ubiquitous quarter‐power scaling laws in the biosphere.

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“…In other words, the spurious correlation between the C i and M variables may lead to misleading observed exponents. For example, prior work has reported an

N \propto M^{- 0.33}

Section: Discussionmentioning

confidence: 99%

The scaling of elemental stoichiometry and growth rate over the course of bamboo ontogeny

Ouyang,

Tian,

Niklas

et al. 2023

New Phytologist

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“…The "classical" method, which has been widely used for establishing critical dilution curves, proceeds in two steps e.g. (Bélanger et al 2015;Cadot et al 2018;Soratto et al 2020;Fontana et al 2021): (1) the lowest non-limiting K fertilization rate for shoot biomass (4) Kc = a × SB b was identified on each sampling date in 2018 as previously described for the limiting soil K conditions and (2) the K c curve defined by Eq. ( 2) was fitted to the data of shoot biomass and K concentration for that non-limiting K fertilization rate by nonlinear least squares.…”

Section: Discussionmentioning

confidence: 99%

“…This gives a specific critical value for a given shoot biomass. For N (Greenwood et al 1990;Justes et al 1994;Colnenne et al 1998;Debaeke et al 2012) and P (Bélanger et al 2015;Cadot et al 2018;Soratto et al 2020;Fontana et al 2021), studies were carried out to develop critical dilution curves for many crop species. For K, critical dilution curves have so far only been investigated for vegetables and grasslands (Salette and Huché 1991;Greenwood and Stone 1998;Gómez et al 2019) whereas those for cereal or oilseed crops have never been investigated to our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Long-term K fertilization effects on soil available K, grain yield, and plant K critical value in winter wheat

Fontana

Hirte

Bélanger

et al. 2022

Nutr Cycl Agroecosyst

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This study takes advantage of Swiss long-term field experiments (> 30 yrs) with different K fertilization rates at three sites to (i) test the possibility to generalize linear relationships between K extracts (ammonium acetate, K-AA; ammonium acetate EDTA, K-AAE; water, K-H2O; and water saturated with CO2, K-CO2), (ii) determine the K fertilization effect on soil exchangeable K, (iii) determine the K fertilization effect on shoot biomass and grain yield of winter wheat, (iv) analyze the possibility to derive a soil K critical value, and (v) determine a critical plant K (Kc) dilution curve as a function of shoot biomass (SB) using a “classical” and a Bayesian method. Shoot biomass during the growing season, grain yield, and four soil extracts were measured in 2018 after more than 30 years with four to five rates of K fertilization. Unpublished data of soil K-AAE concentrations, and grain yield and K concentrations since the start of the experiments were also used to analyze the relationship between soil K-AAE and the cumulative K budget. The K-AA and K-AAE concentrations can be converted from one to the other [K-AAE = 26.8 + (1.11 × K − AA)], while the relationship between K-H2O and K-CO2 depends on soil pH. The K-AAE concentrations were positively related to the cumulative K budget for K-AAE ranges from a minimal K concentration up to a K holding capacity that were specific to each site. The lack of K fertilization during several decades decreased shoot biomass in 2018 and grain yield over the course of the experiments at only one of the three sites. The K-AAE values corresponding to non-limiting soil K conditions at this site (50—75 mg K kg−1) were close to the critical values previously reported but the large range suggests that more soil parameters should be taken into account to improve the accuracy of the fertilization guidelines. The Bayesian and “classical” methods used for estimating the Kc curve yielded similar results (Kc = 58.21 × SB−0.45) that should be confirmed in future studies under a range of pedoclimatic conditions along with the effect of other nutrients and wheat cultivars.

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“…The relative grain yield of wheat, rape, and maize increases with the increasing PNI values up to about 100 and then decreases, likely because of antagonism with zinc [ 230 ]. The relative potato tuber yields are also closely related to the PNI, validating the critical phosphorus dilution curve as a useful diagnostic tool for improving the phosphorus fertilisation of potato crop systems in the tropical region of Brazil [ 231 ]. Not only yield but also quality can be related to the PNI.…”

Section: Methods Related To the Specific Environments And Nutrients R...mentioning

confidence: 99%

Plant Nutrition—New Methods Based on the Lessons of History: A Review

Kulhánek,

Asrade,

Suran

et al. 2023

Plants

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As with new technologies, plant nutrition has taken a big step forward in the last two decades. The main objective of this review is to briefly summarise the main pathways in modern plant nutrition and attract potential researchers and publishers to this area. First, this review highlights the importance of long-term field experiments, which provide us with valuable information about the effects of different applied strategies. The second part is dedicated to the new analytical technologies (tomography, spectrometry, and chromatography), intensively studied environments (rhizosphere, soil microbial communities, and enzymatic activity), nutrient relationship indexes, and the general importance of proper data evaluation. The third section is dedicated to the strategies of plant nutrition, i.e., (i) plant breeding, (ii) precision farming, (iii) fertiliser placement, (iv) biostimulants, (v) waste materials as a source of nutrients, and (vi) nanotechnologies. Finally, the increasing environmental risks related to plant nutrition, including biotic and abiotic stress, mainly the threat of soil salinity, are mentioned. In the 21st century, fertiliser application trends should be shifted to local application, precise farming, and nanotechnology; amended with ecofriendly organic fertilisers to ensure sustainable agricultural practices; and supported by new, highly effective crop varieties. To optimise agriculture, only the combination of the mentioned modern strategies supported by a proper analysis based on long-term observations seems to be a suitable pathway.

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Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil

Cited by 16 publications

References 43 publications

The scaling of elemental stoichiometry and growth rate over the course of bamboo ontogeny

The scaling of elemental stoichiometry and growth rate over the course of bamboo ontogeny

Long-term K fertilization effects on soil available K, grain yield, and plant K critical value in winter wheat

Plant Nutrition—New Methods Based on the Lessons of History: A Review

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