Effects of silicate application on soil fertility and wheat yield

Abstract

An improvement in soil chemical properties and crop development with silicate application has been confirmed in several plant species. The effects of silicate application on soil chemical properties and wheat growth were investigated in the present study. The experiment was carried out in 8-L plastic pots in a greenhouse. Treatments were arranged in a randomized block design in a 3 × 5 factorial: three soils [Rhodic Acrudox (Ox1) ) and Al 3+ phytotoxic; and increases the soil pH, available Ca, Mg and Si, cation exchange capacity (CEC) and soil base saturation. Silicate application did not affect the available P, exchangeable K and availability of micronutrients (Cu, Zn, Fe and Mn) in the three soils. The application of calcium/magnesium silicate in an acid clayey Rhodic Hapludox improves the development and yield of wheat; however, the silicate application in soil with pH higher to 5.3 and high Si availability does not affect the agronomic characteristics and grain yield of wheat. ) e Al 3+ fitotóxico; e aumenta o pH do solo, Ca, Mg e Si disponível, capacidade de troca catiônica (CTC) e saturação por bases. Aplicação de silicato não afetou o P disponível, K trocável e disponibilidade de micronutrientes (Cu, Zn, Fe e Mn) nos três solos. A aplicação de silicato de cálcio/magnésio em um Latossolo Vermelho argiloso ácido melhora o desenvolvimento e a produtividade do trigo; no entanto, a aplicação de silicato em solos com pH superior a 5,3 e alta disponibilidade Si não afeta as características agronômicas e produtividade de grãos do trigo. Palavras-chave: Triticum aestivum L., silício, propriedades químicas, correção da acidez

Assessing Forms of Application of Azospirillum brasilense Associated with Silicon Use on Wheat

“…As this field trial was carried out under irrigation, the stress caused by drought was not evident; moreover, sandy soils are more responsive than clay soils to silicate application [80]. In addition, the increased grain yield is unlikely when the contents of Si available in soil are above than 10.0 mg·kg −1 [37,81]. In this study, the Si content after Si application was above this range (15.8 and 18.4 mg·kg −1 at a depth of 0-0.20 m, in 2015 and 2016, respectively).…”

“…In this study, the Si content after Si application was above this range (15.8 and 18.4 mg·kg −1 at a depth of 0-0.20 m, in 2015 and 2016, respectively). The use of silicate did not negatively affect the crop development or A. brasilense inoculation and numerically provided an increase in grain yield compared to limestone application in 12.2%; being a source of Si, the silicate can neutralize the acidity and toxic Al in tropical soils [35][36][37]. In addition, intensive cropping systems remove large Si amounts from the soil [27]; thus, without adequate Si recycling and uptake by plants, the decrease in Si availability would negatively impact cropping systems if not properly restored [62,82].…”

“…In addition, greater Si availability can result in higher cellulose content in photosynthetic tissues, such as leaves, and lower cellulose content in tissues with a stabilization function, such as culm [67]. Therefore, Si could benefit wheat foliar architecture, promote erectness, improve leaf angle and light interception, avoid excessive self-shading, reduce lodging, delay senescence, and increase the structural rigidity of the tissues [37,68,69].…”

“…In addition, the Si-increased benefits and yields were associated with proline and total sugar accumulation under biotic and abiotic stress conditions [26,65,72]. Silicon use was reported to increase rice [73], maize [74], sugar cane [75], wheat [37,76], sorghum [77], sunflower [78], peanut, soybean, and common bean [79] yields. As this field trial was carried out under irrigation, the stress caused by drought was not evident; moreover, sandy soils are more responsive than clay soils to silicate application [80].…”

Can silicon (Si) fertilization influence the production and nutritional value of Urochloa Convert HD364?

“…A reason for the resistance of Brachiaria grass (syn. Urochloa) in Cerrado soil may be its ability to absorb and accumulate Si in the epidermis of leaves, thereby reducing the toxic effects of aluminum (Al), manganese (Mn), and iron (Fe) and increasing phosphorus (P) availability (COCKER et al, 1998;KORNDÖRFER et al, 2006;SARTO et al, 2015). In addition, it is known that Si in Brachiaria (syn.…”