Fixação biológica de nitrogênio e teores foliares de nutrientes na soja em função de doses de molibdênio e gesso agrícola

Gelain, Evandro; Rosa, Edgard Jardim; Mercante, Fábio Martins; Fortes, Danilo Gomes; Souza, Fábio Régis de; Rosa, Yara Brito Chaim Jardim

doi:10.1590/s1413-70542011000200005

Cited by 12 publications

(11 citation statements)

References 12 publications

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“…The increase in Ca and S in the leaf contents was expected since this corrective is a source of these nutrients. Increases in Ca and S concentrations in soybean leaves were also observed in other studies (CAIRES et al, 2003;JORIS;CHURKA, 2011;GELAIN et al, 2011).…”

Section: Resultssupporting

confidence: 85%

Gypsum and Phosphorus in Improving Biometric and Nutritional Attributes of Soybean/Second Season Corn Succession

et al. 2018

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-The objective with this work was to evaluate the effect of the agricultural gypsum, associated with phosphate fertilization, on the nutrition, development and yield of soybean and corn in succession, under no-tillage system. The experiment was conducted at Universidade Federal de Goiás, Regional Jataí, in a randomized blocks design 5x3 factorial arrangement, with 4 replicates. The first factor consisted of the gypsum doses (0, 1, 2, 4 and 8 Mg ha-1) and the second the phosphorus doses (0, 50 and 100% of the recommended dose). Leaf nutrient contents, leaf area index, SPAD index, dry plant mass, final plant population, one thousand grain mass and grain yield were evaluated in the crops. In the soybean, the number of pods was also obtained and in the corn the average ear length, number of rows per ear, number of grain per ear and number of ears. Phosphorus doses increase leaf Mg contents in soybean and corn. The application of gypsum reduces the Mg and K leaf contents and increases the Ca, S, and Mn contents in the two cultures. Gypsum provides increases in the SPAD index in soybean plants. The unbalance of the N / K ratio in corn leaves, provided by the increase of the gypsum doses, reduces the leaf area of this crop. Doses of P and gypsum do not influence the yield of soybeans and maize.

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Section: Resultssupporting

confidence: 85%

Gypsum and Phosphorus in Improving Biometric and Nutritional Attributes of Soybean/Second Season Corn Succession

et al. 2018

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“…A decrease in Mg concentration in corn leaf tissue after PG application was reported also by Raij et al (1998) and Caires et al (2004). For wheat, Caires et al (2002) reported no effect of PG application on Mg leaf concentration, while Rampim et al (2011) also observed a decline in leaf Mg, and the studies of Caires et al (2003; and Gelain et al (2011) found increasing PG application rates related to a decrease in Mg concentration in soybean leaves.…”

Section: Macronutrient Plant Leaf Tissue Concentrationsmentioning

confidence: 53%

Do Rates and Splitting of Phosphogypsum Applications Influence the Soil and Annual Crops in a No-Tillage System?

Vicensi

Müller

Kawakami

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:Applications of phosphogypsum (PG) provide nutrients to the soil and reduce Al 3+ activity, favoring soil fertility and root growth, but allow Mg 2+ mobilization through the soil profile, resulting in variations in the PG rate required to achieve the optimum crop yield. This study evaluated the effect of application rates and splitting of PG on soil fertility of a Typic Hapludox, as well as the influence on annual crops under no-tillage. Using a (4 × 3) + 1 factorial structure, the treatments consisted of four PG rates (3, 6, 9, ) and three split applications (P1 = 100 % in 2009; P2 = 50+50 % in 2009 and 2010; P3 = 33+33+33 % in 2009, 2010 and 2011), plus a control without PG. The soil was sampled six months after the last PG application, in stratified layers to a depth of 0.8 m. Corn, wheat and soybean were sown between November 2011 and December 2012, and leaf samples were collected for analysis when at least 50 % of the plants showed reproductive structures. The application of PG increased Ca 2+ concentrations in all sampled soil layers and the soil pH between 0.2 and 0.8 m, and reduced the concentrations of Al 3+ in all layers and of Mg 2+ to a depth of 0.6 m, without any effect of splitting the applications. The soil Ca/Mg ratio increased linearly to a depth of 0.6 m with the rates and were found to be higher in the 0.0-0.1 m layer of the P2 and P3 treatments than without splitting (P1). Sulfur concentrations increased linearly by application rates to a depth of 0.8 m, decreasing in the order P3>P2>P1 to a depth of 0.4 m and were higher in the treatments P3 and P2 than P1 between 0.4-0.6 m, whereas no differences were observed in the 0.6-0.8 m layer. No effect was recorded for K, P and potential acidity (H+Al). The leaf Ca and S concentration increased, while Mg decreased for all crops treated with PG, and there was no effect of splitting the application. The yield response of corn to PG rates was quadratic, with the maximum technical efficiency achieved at 6.38 Mg ha -1 of PG, while wheat yield increased linearly in a growing season with a drought period. Soybean yield was not affected by the PG rate, and splitting had no effect on the yield of any of the crops. Phosphogypsum improved soil fertility in the profile, however, Mg 2+ migrated downwards, regardless of application splitting. Splitting the PG application induced a higher Ca/Mg ratio in the 0.0-0.1 m layer and less S leaching, but did not affect the crop yield. The application rates had no effect on soybean yield, but were beneficial for corn and, especially, for wheat, which was affected by a drought period during growth.

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“…This effect is related to the Mo content contained in the product, 23.54%. According to Gelain et al (2011), Mo is an essential element for the activity of nitrate reductase, which reduces nitrate to nitrite, which is directly related to the supply of the N to the plant. According to the authors, the application of molybdenum fertilizer via seed treatment is more indicated because it is more practical and effective in relation to the soil or foliar applications.…”

Section: Methodsmentioning

confidence: 99%

Biostimulants on mineral nutrition and fiber quality of cotton crop

Silva

Santos

Oliveira

et al. 2016

Rev. bras. eng. agríc. ambient.

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Biostimulants are used in cotton (Gossypium hirsutum L.) to balance vegetative and reproductive growth as well as to increase cotton seed yield and fiber quality. Therefore, in order to study the efficiency of seed treatment with biostimulants, nutrition, production and technological quality for the cotton fiber, a field experiment was installed. The study was conducted at the Alvorada farm research field, in Luis Eduardo Magalhães municipality - BA. The experiment was arranged in a completely randomized block design with four replicates and five treatments (control group, untreated group, Booster®, Stimulate®, Improver® and Biozyme®). Leaf contents of nutrients, yield and technological quality of the fiber were evaluated. The results showed that application of biostimulants in the seeds increased the N, K, S and Fe contents in the cotton leaf, but there was no influence on the crop yield. However, these products caused changes in the fiber characteristics, related to length uniformity, micronaire, length and strength of the fiber.

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Fixação biológica de nitrogênio e teores foliares de nutrientes na soja em função de doses de molibdênio e gesso agrícola

Cited by 12 publications

References 12 publications

Gypsum and Phosphorus in Improving Biometric and Nutritional Attributes of Soybean/Second Season Corn Succession

Gypsum and Phosphorus in Improving Biometric and Nutritional Attributes of Soybean/Second Season Corn Succession

Do Rates and Splitting of Phosphogypsum Applications Influence the Soil and Annual Crops in a No-Tillage System?

Biostimulants on mineral nutrition and fiber quality of cotton crop

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