ALTERAÇÕES NO SISTEMA SOLO-PLANTA EM FUNÇÃO DA REAPLICAÇÃO DE SILICATOS NO SISTEMA PLANTIO DIRETO

Objetivou-se avaliar as alterações químicas ao longo do perfil do solo, o desenvolvimento e a produtividade da cultura da soja (Glycine Max L. “Merr”) em função da aplicação superficial de silicatos na correção da acidez do solo. Este experimento vem sendo conduzido há sete anos, em delineamento com blocos casualizados e parcelas subdivididas. As parcelas foram distribuídas inicialmente pelas formas de aplicação dos corretivos: aplicação com incorporação até 20 cm de profundidade e aplicação em superfície; e na subparcela têm se os corretivos: escória de aciaria, escória de forno de panela, escória do aço, wollastonita, calcário agrícola e calcário agrícola calcinado; além de uma testemunha sem aplicação de material corretivo; com quatro repetições. Os corretivos foram reaplicados manualmente a lanço, sem incorporação para ambas as formas de aplicação adotadas na implantação do sistema plantio direto. A wollastonita, escória do aço inox e escória de aciaria aumentaram os teores de P, K, Ca e Si, e os valores de SB, V% e pH. Para a soja, esses acréscimos foram fundamentais para proporcionar incrementos na produtividade de grãos chegando a 7,0 Mg ha-1 com a aplicação de escória de aciaria, não diferindo estatisticamente da escória do aço inox e da wollastonita.Palavras-chave: acidez do solo; calagem; escória de siderurgia; silício; soja. CHANGES IN THE SOIL-PLANT SYSTEM DUE TO THE REAPPLICATION OF SILICATES IN THE NO-TILLAGE SYSTEM ABSTRACT: The objective of this study was to evaluate the chemical changes along the soil profile, development and yield of the soybean crop (Glycine Max L. "Merr") as a function of the superficial application of silicates in soil acidity correction. This experiment has been conducted for seven years, in a randomized complete block design and subdivided plots. The plots were initially distributed by the application of the correctives: application with incorporation up to 20 cm and surface application; and in the subplot have the correctives: steel slag, ladle furnace slag, stainless steel slag, wollastonite, agricultural limestone and calcined agricultural limestone; as well as a control treatment without the use of correctives; with four replicates. The correctives were reapplied manually, without incorporation for both forms of application adopted in the implantation of the no-tillage system. Wollastonite, stainless steel slag and steel slag increased the contents of P, K, Ca and Si, and the values of SB, base saturation and pH. For soybeans, these additions were essential to provide grain yield increases of 7.0 Mg ha-1 with the application of steel slag, not statistically differing from stainless steel slag and wollastonite.Keywords: acidity of soil; liming; steel slag; silicon; soybean.

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High-capacity adsorbents from stainless steel slag for the control of dye pollutants in water

Environmental Science and Pollution Research ◽

10.1007/s11356-020-12174-0 ◽

2021 ◽

Author(s):

Lorenzo Plaza ◽

Marta Castellote ◽

Roman Nevshupa ◽

Eva Jimenez-Relinque

Keyword(s):

Stainless Steel ◽

Steel Slag ◽

High Capacity ◽

Stainless Steel Slag ◽

Dye Pollutants

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Technical and Economic Viability of Wheat with Forms of Application and Doses of Boron

Journal of Agricultural Science ◽

10.5539/jas.v10n4p306 ◽

2018 ◽

Vol 10 (4) ◽

pp. 306 ◽

Cited By ~ 1

Author(s):

Fernando S. Galindo ◽

Marcelo C. M. Teixeira Filho ◽

Salatiér Buzetti ◽

Eduardo H. M. Boleta ◽

Willian L. Rodrigues ◽

...

Keyword(s):

Experimental Design ◽

Block Design ◽

Leaf Tissue ◽

Economic Viability ◽

No Tillage ◽

Wheat Grain ◽

Economic Return ◽

Randomized Block Design ◽

Tillage System ◽

Irrigated Wheat

Boron is one of the most limiting micronutrients in grains production system in Brazil. In this way, the objective was to evaluate the effect of forms of application and doses of boron in irrigated wheat grain yield evaluating the economic terms in Cerrado region. The experiment was conducted in no-tillage system in an Oxisol with clay texture in Selvíria, MS, Brazil. The experimental design was a randomized block design with four replicates, arranged in a 4 × 3 factorial scheme: four doses of boron (0, 1, 2 and 4 kg ha-1) with boric acid source (B = 17%); and three apllication forms: a) in desiccation of the predecessor straw, together with herbicide; b) at the time of sowing, in soil along with the formulated fertilization seeding and c) via leaf tissue with the application of post emergent herbicide. The application of 2 kg ha-1 provides greater grain yields, but the highest economic return was obtained at the dose of 1 kg ha-1, with application in soil, ensuring profitability from production of irrigated wheat in the Cerrado.

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Molybdenum mixed with glyphosate and alone via foliar spray in no-tillage common bean grown on corn stover

Revista CERES ◽

10.1590/s0034-737x2014000100008 ◽

2014 ◽

Vol 61 (1) ◽

pp. 62-69

Author(s):

Gessimar Nunes Camelo ◽

Geraldo Antonio de Andrade Araújo ◽

Renildes Lucio Ferreira Fontes ◽

Luiz Antonio dos Santos Dias ◽

José Eustáquio de Souza Carneiro ◽

...

Keyword(s):

Common Bean ◽

Corn Stover ◽

Field Experiments ◽

Block Design ◽

Foliar Spray ◽

Cumulative Effect ◽

No Tillage ◽

Randomized Block Design ◽

Tillage System ◽

Mo Content

The effect of molybdenum (Mo) on common bean grown in desiccated corn stover in a no-tillage system was evaluated under two application modes: Mo mixed with the desiccant glyphosate and Mo direct spray to the bean leaves. The treatments (four replicates) were assigned to a completely randomized block design in a split-plot arrangement with the application of Mo (0, 100, 200, 400 and 800 g ha-1) mixed with glyphosate in the main plots and Mo foliar spray (0 and 100 g ha-1) in the sub-plots. The field experiments were carried out in 2009 and 2010 in the municipality of Coimbra, Minas Gerais State, with the common bean cultivar Ouro Vermelho. Mo mixed with glyphosate had neither an effect on common bean yield nor on the Mo and N contents in leaves, however it increased the Mo and N contents in seeds. Application of Mo via foliar spray increased Mo content in leaves and Mo and N contents in seeds. The reapplication of molybdenum with glyphosate for desiccation in subsequent crops caused a cumulative effect of Mo content in bean seeds.

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Pertumbuhan dan Hasil Kedelai di Lahan Rawa Lebak dengan Aplikasi Pupuk Hayati dan Kimia

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) ◽

10.24831/jai.v45i3.14488 ◽

2018 ◽

Vol 45 (3) ◽

pp. 263

Author(s):

Endriani , ◽

Munif Ghulamahdi ◽

Dan Eko Sulistyono

Keyword(s):

Glycine Max ◽

Soil Fertility ◽

Block Design ◽

Randomized Block Design ◽

National Production ◽

Glycine Max L ◽

Number Of Leaves ◽

Four Levels ◽

P Fertilizers ◽

Number Of Branches

Soybean (Glycine max L. Merrill) demand is high in Indonesia, however national production is low, therefore improving productivity is important. The research was aimed to determine the effect of application of biofertilizer containing N- fixing and P- solubilizing bacteria on the growth and production of soybean in lowland swamp. The experiment was conducted at Labuhan Ratu VI Village, District of Labuhan Ratu, East Lampung Regency from September to December 2014. The experiment was arranged in factorial randomized block design with three replications. N and P fertilizers were applied in four levels. Doses of N were 0, 11.25, 22.50, 33.75 kg ha-1, doses of P were 0, 36, 72, 108 P2O5 kg ha-1, in combination with and without biofertilizer application. The results showed that interaction between biofertilizer and N significantly affected number of branches and number of leaves at maximum vegetative phase. The influence of three types of fertilizer had no significant effect on the productivity of soybean in lowland swamp with soil pH of 7.0 and medium soil fertility. It is recommended to apply Biofertilizer + 11,25 kg N ha-1 + 36 kg P2O5 ha-1 to obtain high soybean production in lowland swamp area.<br /><br />Keywords: nitrogen, phosphate, productivity, soil fertility<br /><br />

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PERUBAHAN BENTUK DAN UKURAN BENIH DUA KULTIVAR KEDELAI (Glycine max (L.) Merr.) DI JATINANGOR DAN CIKAJANG

Paspalum: Jurnal Ilmiah Pertanian ◽

10.35138/paspalum.v5i1.31 ◽

2017 ◽

Vol 5 (1) ◽

pp. 1

Author(s):

Siti Rodiah ◽

Zulfatunnisa Zulfatunnisa ◽

Sumadi Sumadi ◽

Anne Nuraini ◽

Meddy Rachmadi ◽

...

Keyword(s):

Glycine Max ◽

Low Temperature ◽

Seed Size ◽

Block Design ◽

Soybean Seed ◽

Growth Environment ◽

Randomized Block Design ◽

Glycine Max L ◽

Improved Cultivars ◽

Size Heterogeneity

The variation of the seed size in each species and individuals might be from of difference species adaptation for a difference environment. This difference may also arise from the constraints of limited formation of seed size. The use of adaptive ciltivars on the growth environment is very influential on the succes in the farm field. This research was aimed to find the adaptation of phase and size seed of two cultivars of soybeans in Jatinangor and Cikajang. This research was held in Jatinangor (Sumedang regency) and Cikajang (Garut regency) from April to July 2016. The design that used in this research was Randomized Block Design (RBD) and Duncan at 5% rate. Improved cultivars that tested in this research were placed at Grobogan and Anjasmoro which were repeated 5 times. The results of experiment showed that adaptation of size seed showed of 100 grains and large seeds. The low temperature condition can increase of variability of seed size. Heterogeneity of environment can not sustain the size of soybean seed. Genetic and environment factors influence significantly for weight of 100 grains and seed size Grobogan in Jatinangor. The weight of 100 grains Grobogan in Jatinangor and Cikajang haved a greater than Anjasmoro. Environmental factors influence yield of soybean, weight of 100 grains of cultivars in Cikajang haved a greater than Jatinangor caused by the seed size.

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Experimental Study on Precipitation Behavior of Spinels in Stainless Steel-Making Slag under Heating Treatment

Processes ◽

10.3390/pr7080487 ◽

2019 ◽

Vol 7 (8) ◽

pp. 487 ◽

Cited By ~ 5

Author(s):

Jianli Li ◽

Qiqiang Mou ◽

Qiang Zeng ◽

Yue Yu

Keyword(s):

Particle Size ◽

Stainless Steel ◽

Steel Slag ◽

Calcium Content ◽

Heating Time ◽

X Ray Diffraction ◽

Stainless Steel Slag ◽

Steel Making ◽

Heating Treatment ◽

The Stability

The stability of chromium in stainless steel slag has a positive correlation with spinel particle size and a negative correlation with the calcium content of the spinel. The effect of heating time on the precipitation of spinel crystals in the CaO-SiO2-MgO-Al2O3-Cr2O3-FeO system was investigated in the laboratory. Scanning electron microscopy with energy-dispersive and X-ray diffraction were adopted to observe the microstructure, test the chemical composition, and determine the mineral phases of synthetic slags, and FactSage7.1 was applied to calculate the crystallization process of the molten slag. The results showed that the particle size of the spinel crystals increased from 9.42 to 10.73 μm, the calcium content in the spinel crystals decreased from 1.38 at% to 0.78 at%, and the content of chromium in the spinel crystal increased from 16.55 at% to 22.78 at% with an increase in the heating time from 0 min to 120 min at 1450 °C. Furthermore, the species of spinel minerals remained constant. Therefore, an extension in the heating time is beneficial for improving the stability of chromium in stainless steel slag.

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