Chemical composition of soybean seeds subjected to fertilization with rock dusts

Abstract

. Rock dusts in association with organic sources have been used in agriculture to improve soil chemical characteristics and food composition. In this context, this study aimed to evaluate the effect of the rock dusts siltstone, tephrite, and olivine melilitite pure or combined and associated or not with cattle manure on the chemical composition of soybean seeds of the cultivar BRS 232 grown on a Cambisol and Nitisol subjected to these treatments and conventional fertilization. For this, an experiment was carried out with pots in a greenhouse using a Cambisol and Nitisol to cultivate the soybean from January to May 2019 until seed production. The seeds were harvested, ground, and sieved through a 1 mm mesh sieve to determine the nutrient, phytate, and crude protein contents. The effects of the rock dusts on the chemical composition of seeds were directly related to the chemical characteristics of the evaluated soils. The tested rock dusts had a more pronounced response in the Cambisol (poorer soil) than in the Nitisol (more fertile). The contents and accumulation of nutrients in the seeds, as well as the total dry matter production in both soils subjected to the treatments with the rock dusts olivine melilitite and siltstone + olivine melilitite, pure and combined with manure, were similar and, in some cases, higher than the treatments subjected to conventional fertilization. The combination of manure and rock dusts provided an increase in the concentration of nutrients in both soils, resulting in their higher availability for plants and directly reflecting on the chemical composition of seeds.

Changes in vineyard soil parameters after repeated application of organic-inorganic amendments based on spent mushroom substrate

“…Significant correlations were found between soil OC content and P, K, Ca or Mg content (r = 0.89-0.99, p range = 0.050-0.000) in S1, and r = 0.84-0.99, p range = 0.050-0.000 in S2) after both years of amendment application, indicating that SMS and SMS + OF could be potential sources of P and K in soils. The organic amendments' potential for improving the available nutrient content of a degraded soil has been reported following the application of other organic wastes in general (Amoah-Antwi et al, 2020;Bonanomi et al, 2020) or these wastes combined with rock dust (Basak et al, 2021;Cunha et al, 2022;Swoboda et al, 2022). In turn, the significant correlation found between the nutrients P and K for the two experimental periods and for both soils (p = 0.000-0.05) points to a similar origin.…”

“…Mineral nutrients are extracted from the soil with each harvest, and need to be adequately replaced by fertilisers or other amendments to avoid their total extraction and depletion and improve soil quality. In this context, the application of rock dust to soil after weathering or intensive soil management practices is now considered a natural resource for soil re-mineralisation (Cunha et al, 2022). It provides a large amount of nutrients, and has been recommended for its potential beneficial effects on increasing cation exchange capacity, pH, and mineral content (Swoboda et al, 2022).…”

“…It provides a large amount of nutrients, and has been recommended for its potential beneficial effects on increasing cation exchange capacity, pH, and mineral content (Swoboda et al, 2022). Some authors (Basak et al, 2021;Cunha et al, 2022) have reported a good performance in the productivity of plants subjected to the use of rock dust, mainly those with a long cycle, compared to plants subjected to conventional fertilisation. The literature is not clear about the best types of rock dust to use, but glacial and primary minerals, such as dolerite or feldspars, have been studied (Cunha et al, 2022).…”

“…Some authors (Basak et al, 2021;Cunha et al, 2022) have reported a good performance in the productivity of plants subjected to the use of rock dust, mainly those with a long cycle, compared to plants subjected to conventional fertilisation. The literature is not clear about the best types of rock dust to use, but glacial and primary minerals, such as dolerite or feldspars, have been studied (Cunha et al, 2022). Moreover, the performance of rock dust can be improved by mixing these products with organic wastes, such as manure, sewage sludge and crop residues, to obtain nutrient-enriched materials, although the benefit of this compost will depend on the physical, biological and chemical nature of the mineral and organic materials that are co-composted (Basak et al, 2021;Meena and Biswas, 2014).…”

The Impact Ground Phonolite Rock’s Potassium Solubilization in Tropical Soil Depends on the Cultivated Forage Species

“…One strategy that can be used to accelerate the solubilization of low-solubility minerals is the cultivation of plants with known solubilizing action by increasing the amount of K available in the soil [ 6 , 9 ]. Plants have the capacity to chemically change the rhizosphere both through the release of H + and OH − ions via the electrochemical balance and through the exudation of organic acids of low molecular weight (e.g., oxalate, citrate, and malate), which induces the dissolution of primary silicate minerals, such as potassic feldspars [ 2 , 10 , 11 ]; therefore, it is plant-dependent in the short term [ 10 , 12 , 13 , 14 ].…”