Sufficiency ranges and crop nutrient removals for peppermint (<i>Mentha</i> X <i>piperita</i> L.) established from field and pot fertilizer experiments

Arrobas, Margarida; Ferreira, I.Q.; Afonso, Sandra; Rodrigues, M. Ângelo

doi:10.1080/00103624.2018.1474909

Cited by 10 publications

(11 citation statements)

References 29 publications

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“…N is a limiting factor for plant growth, particularly in potted plants with reduced space for root expansion (Ferreira et al, 2020;Rodrigues et al, 2018), and can be taken up to luxury consumption levels when available in the soil (Havlin et al, 2014). Thus, the lower N concentration in the control and K-silicate treatments was mainly the result of a dilution effect, which occurs due to the increase in plant biomass for the same amount of N available in the growing medium (Arrobas, Ferreira, et al, 2018b;Jarrel & Beverly, 1981).…”

Section: Discussionmentioning

confidence: 95%

Metalaxyl-M, phosphorous acid and potassium silicate applied as soil drenches show different chestnut seedling performance and protection against Phytophthora root rot

et al. 2021

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The application as soil drenches of three commercial products containing metalaxyl, phosphorous acid or potassium silicate, were studied as a means of controlling Phytophthora in chestnut (Castanea sativa Mill.) seedlings. In the metalaxyl treatment no plant deaths were recorded, whereas with the phosphorous acid and potassium silicate applications, and in the untreated control, the mortality rate was respectively 33.3, 44.4 and 77.8%. The presence of Phytophthora was detected in plants and soils at the end of the experiment which means that the three products did not eliminate the pathogen, and that they only gave temporary protection to the plant. In the treatments receiving metalaxyl or phosphorous acid, the plants showed a sharp drop in growth compared to the surviving plants of the control. Soil analyses revealed a high increase in exchangeable acidity, a high reduction in pH and a high increase in Mn levels in the soils treated with the products containing metalaxyl or phosphorous acid. In these treatments, elemental tissue analysis and nutrient recovery by plants revealed Mn levels far above the upper limit of the sufficiency range, with the toxicity of Mn being the suspected cause for the strong reduction in plant growth. These results indicate that when applying such products to the soil, their concentration and/or their ability to influence the soil pH should be evaluated and adequate measures of pH adjustment undertaken. In the case of phosphorous acid, its use can be replaced by phosphite salts. K-silicate did not show adverse effects on plant growth but provided less protection against Phytophthora than metalaxyl or phosphorous acid.

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Section: Discussionmentioning

confidence: 95%

Metalaxyl-M, phosphorous acid and potassium silicate applied as soil drenches show different chestnut seedling performance and protection against Phytophthora root rot

et al. 2021

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“…This thesis is supported by the increase in organic C and Kjeldahl N in the soil, revealing that part of the applied N is still in organic form. The increase in the production of grapes and, above all, the increase in weeds' dry matter yield gave rise to a dilution effect, which normally contributes to the reduction of the concentration of nutrients in the tissues (Arrobas et al, 2018;Jarrell & Beverly, 1981). Many other inefficiencies of N use may have contributed to the result.…”

Section: Discussionmentioning

confidence: 99%

“…Considering that the usual soil organic matter content in perennial crops in the region is low (Arrobas et al, 2018;Rodrigues & Arrobas, 2020;Rodrigues et al, 2015), and given also the scarcity of farmyard manure, the possibility of using this resource is very attractive for some farmers. In this study, results are reported of the effect of the application of the compost 'Ferti Trás-os-Montes' in an experimental vineyard at the rate of 20 t ha −1 over three consecutive years.…”

Section: Introductionmentioning

confidence: 99%

“…When pH increases, more functional groups undergo dissociation of H + ions, leaving behind an increasing number of negatively charged sites (Weil & Brady, 2017). However, the increase in CEC did not cause an increase in the concentration of Ca and Mg in the tissues, probably because of a dilution effect that usually results from either the stimulus to dry matter yield (Arrobas et al, 2018;Jarrell & Beverly, 1981) and/or eventually through ion antagonism caused by K that occurs when K supply is abundant (Hawkesford et al, 2012).…”

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confidence: 99%

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The safe use of compost derived from municipal solid waste depends on its composition and conditions of application

Arrobas

Carvalho

Raimundo

et al. 2021

Soil Use and Management

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Municipal solid waste compost (MSWC) is a source of organic C and other nutrients, which, when free from potential contaminants, can be used as a soil amendment. This study was carried out over three years in a vineyard with soil pH close to neutral under an experimental design consisting of two treatments (with and without MSWC). Application of MSWC is currently authorized under national legislation to be used in vineyards, orchards and forests at a maximum rate of 10 t ha −1 year −1 . In this study, for experimental purposes, a double rate (20 t ha −1 year −1 ) was used. The accumulated grape yield increased in the amended plot by 28% and the dry biomass of weeds between rows by 119%. The MSWC significantly increased some relevant soil properties such as organic C, pH, cation exchange capacity (CEC) and extractable P, K and B. The concentration of K increased significantly in several tissues, and the concentration of P decreased.However, the concentration of K, P and other essential nutrients in the leaves remained within their sufficiency ranges. Tissue levels of heavy metals (Cr, Cd, Pb and Ni) did not increase with the MSWC application, and the values in the pulp remained below the limits established for foodstuffs. The results from this study indicate that the continuous application of the MSWC does not seem to be sustainable, because of the risk of causing nutritional disorders. Products with similar composition should therefore be used only on more acidic soils and should never exceed the legally established rates.

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“…The concentration of almost all the nutrients analysed varied significantly with the year, irrespective of plant tissue and sampling date. This great dynamic in tissue nutrient concentrations depends on diverse factors; one of the most relevant of these is the dilution/concentration effect related to nutrient uptake and carbon assimilation, and plant growth [34,40], which does not justify further development here. SPAD readings and chlorophyll fluorescence and OJIP transient variables presented inconclusive results, they too are probably related to the concentration of nutrients in the tissues and dilution/concentration effects [37].…”

Section: Discussionmentioning

confidence: 99%

Response of Hops to Algae-Based and Nutrient-Rich Foliar Sprays

2021

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Over recent years, some hopyards of northeast Portugal have presented poorly developed plants and reduced productivity. In this study, an attempt was made to improve the homogeneity of hop fields and restore their productivity by using plant biostimulants as foliar sprays. The experimental apparatus included four field trials carried out in four plots of different plant vigour, as evaluated by farmers over previous years (weak, fair, good and very good). The experiments were arranged as a factorial of foliar treatment (two plant biostimulants containing extracts of seaweed algae and an untreated control) and year (2017 and 2018). The plot and the year influenced greatly almost all the measured variables related to tissue nutrient concentration and crop performance. In the control plots, cone dry matter (DM) yield varied from 83.3 to 394.4 g plant−1 from the weak to the very good plots. In 2018, cone DM yield was significantly higher than in 2017. The use of foliar sprays influenced less the elemental composition of plant tissue than the plot or the year. The use of foliar sprays only increased significantly crop yield in the plot of weak plant vigour. The foliar treatments did not increase α- and β-acid concentration in the cones; in the control treatment of the most productive plot, the values were, respectively, 11.2 and 3.9%. Although seaweed extracts tend to help plants cope with several abiotic and biotic stresses, they showed to be effective in mitigating the stress that is affecting these plants, which probably is poor soil drainage caused by the flooding irrigation system, only under conditions of severe stress.

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Sufficiency ranges and crop nutrient removals for peppermint (Mentha X piperita L.) established from field and pot fertilizer experiments

Cited by 10 publications

References 29 publications

Metalaxyl-M, phosphorous acid and potassium silicate applied as soil drenches show different chestnut seedling performance and protection against Phytophthora root rot

Metalaxyl-M, phosphorous acid and potassium silicate applied as soil drenches show different chestnut seedling performance and protection against Phytophthora root rot

The safe use of compost derived from municipal solid waste depends on its composition and conditions of application

Response of Hops to Algae-Based and Nutrient-Rich Foliar Sprays

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