Potassium leaching in different soils as a function of irrigation depths

Mendes, Walter da Costa; Júnior, José Alves; Cunha, Paulo César Ribeiro da; Silva, Anderson Rodrigo da; Evangelista, Adão Wagner Pêgo; Casaroli, Derblai

doi:10.1590/1807-1929/agriambi.v20n11p972-977

Cited by 59 publications

(32 citation statements)

References 15 publications

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“…0 9 -0 2 -1 3 0 9 -1 6 -1 3 0 9 -3 0 -1 3 1 0 -1 4 -1 3 1 0 -2 8 -1 3 1 1 -1 1 -1 3 1 1 -2 5 -1 3 1 2 -0 9 -1 3 1 2 -2 3 -1 3 0 1 -0 6 -1 4 0 1 -2 0 -1 4 0 2 -0 3 -1 4 0 2 -1 7 -1 4 than 70mm day -1 . This has possibly optimized the K + displacement process in the soil profile and corroborates Mendes et al (2016), who observed an increase in the leaching of K + with the increase in the applied water depth. Such event tends to get worse in relation to mineral fertilization, in which nutrient release is much faster into the soil, causing faster displacement under intense rainfall conditions in the region.…”

Section: Chemical Changes In Soilsupporting

confidence: 84%

The release of macronutrients from second crop corn straw and their behaviour in a red-yellow latosol

et al. 2019

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Crop residues left on the soil function as a nutrient reservoir and as a ground cover in agricultural systems. The aim of the present study is to assess the chemical alterations in the soil after the decomposition of different amounts of straw from corn as second crop. The climate of the region is classified as hot tropical and the soil is categorized as Red-Yellow Latosol (Typic hapludox) in the cerrado-amazon ecotone. The experiment was set up in randomized blocks in September 2013 after harvesting the second crop corn, comprised of corn straw rates (0, 14.18 and 42.54 t ha-1) with six repetitions. The content of macronutrients, H+Al, pH and base saturation in the soil profile were assessed. The straw rates were added to litter bags and stored on the soil, where they were kept for 154 days throughout the rainy period. Subsequently, the soil characteristics were assessed in layers 0 to 0.05, 0.05 to 0.10, 0.10 to 0.15, 0.15 to 0.20 and 0.20 to 0.40 m. The Ca+2 and Mg+2 elements were only released by the straw on the first 0.05 m of soil. However, K circulated in the soil profile reaching depth of 0.40 m. There was reduction in K+ saturation in treatments without straw. No alterations were observed in the other nutrients and studied attributes. According to the results, it is important to distribute the cultural remains of maize homogeneously in the area during harvesting to avoid the appreciation of soil fertility spots, especially of K.

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Section: Chemical Changes In Soilsupporting

confidence: 84%

The release of macronutrients from second crop corn straw and their behaviour in a red-yellow latosol

et al. 2019

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“…This precipitation rate facilitated vertical movement of fertilizers. Mendes et al (2016) observed an increase in K leaching as increase in the applied water blade. The highest K + values were observed in the 1st and 2nd collections in the layer to 0.05 m depth at the rate of 320 kg ha -1 K2O with 181 and 169 mg dm -3 , respectively.…”

Section: Effect On Soil Chemical Propertiesmentioning

confidence: 86%

“…K is a nutrient that moves on the soil by diffusion. In high concentrations, it remains as solution on the soil; thus, it can be leached (Lange et al, 2008;Mendes et al, 2016). The accumulated precipitation from fertilization until the soil collection was 1,872, 2,127 and 4,265 mm, for the first, second and third year, respectively, as the normal precipitation for the area.…”

Section: Effect On Soil Chemical Propertiesmentioning

confidence: 99%

Fertilization with potassium (K) in the soybean-corn succession affects behavior of plants and in the soil (oxisol)

et al. 2019

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The potassium fertilizer recommendations are almost entirely made by the main culture in the field, without taking into account the predecessor and successor cultures. The nutrients in crop residues represent a reserve for subsequent crops. Therefore, knowledge of the absorption and cycling capacity of nutrient through the culture, and efficient fertilization should consider the entire system are important. This study aimed to evaluate the effect of potassium levels in soybean and corn, changes in nutrient stocks in the soil profile, absorption and accumulation in plant tissues and soybean, corn and Urochloa crop production during the two agricultural years. The study was performed in an oxisol in the cerrado-amazon ecotone, with potassium rates (0, 40, 80, 160 and 320 kg ha-1 K2O). The rates applied in soybean (first crop) and three harvests of residual effect of the applied doses (maize-soybeans-maize) were evaluated. After harvesting the first crop, plots were subdivided (with or without the presence of Urochloa in corn spacing) in order to understand effect of Urochloa to increase the potassium cycling in the system. The grain yield and dry matter of Urochloa, extraction, and export of nutrients and their concentration in the leaf were evaluated. During the experiment, the chemical changes caused in the soil were also evaluated. In the first year, corn yield and the cumulative grain yield of the other crops were increasingly influenced by K2O rates. The rates provided increased K concentration and a decrease in Ca and Mg in plant materials. The Ca and Mg elements showed a decreased trend in the soil influenced by the applied rates of up to 130 days after fertilization. The K showed higher levels influenced by rates even after 619 days. We do not recommend the application of high doses of K due to the large losses caused by leaching.

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“…Some conditioning factors for a better absorption and assimilation of nutrients by wheat plants include low cation exchange capacity, environmental conditions during experiment and nitrogen topdressings. Water deficit or excess are other predominant features responsible for the leaching or volatilization of potassium and nitrogen (Mendes et al, 2016). Flumignan et al (2013) verified a 3-fold increase in treatment efficiency of properly water supplied plants, while studying irrigation influence on wheat production.…”

Section: Yield Grainsmentioning

confidence: 87%

Morphological development and yield of wheat irrigated under nitrogen and potassium fertilization in Cerrado Oxisol

Bonfim-Silva¹,

Freitas²,

Silva³

et al. 2018

Aust J Crop Sci

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This study aimed at assessing the effects of nitrogen-potassium interaction on dry matter and grain yield of irrigated wheat (Triticum aestivum L.) grown in the Brazilian Cerrado. The experiment was conducted for two consecutive cropping seasons (2014 and 2015), between March and August. The experiment was arranged in a randomized block design. Treatments consisted of five nitrogen and five potassium doses in a factorial scheme (5×5). The analyzed variables consisted of the shoot and spike dry weights, and grain yield. In both years (2014 and 2015), isolated effects of nitrogen and potassium doses were observed on the assessed traits. In 2014, the highest results were achieved by the respective nitrogen and potassium doses: 145.02 and 148.32 kg ha -1 for shoot dry weight, 133.79 and 139.85 kg ha -1 for spikes, and 119.14 and 138.83 kg ha -1 for grain yield. Yet in 2015, no significant results were identified, while nitrogen doses showed a linear effect on shoot and spike dry weights, potassium rates revealed such effect on grain yield. Although nitrogen showed a higher response in terms of dry weight for shoot and spikes, potassium induced the largest increases in productivity. Thus, for greater efficiency of fertilization, a careful analysis of the level of soil fertility, the expected productivity and the technological level employed is necessary. It should be emphasized that the management of fertilization has specificities every year, requiring constant adaptation.Keywords: BRS 254 wheat; Cerrado wheat production; nitrogen-potassium ratio; nitrogen and potassium fertilizations; Triticum aestivum. Abbreviations: ANOVA_variance analysis; CAPES_coordination for improvement of higher education personnel; CEC_cation exchange capacity; CNPq_national council for scientific and technological development; EMBRAPA_brazilian agricultural research company; ET o _reference evapotranspiration; FAO_ food and agriculture organization of the united nations; FAPEMAT_research support foundation of the state of mato grosso; FTE_fritted trace elements; KCL_potassium chloride; O.M._organic matter; SAS_statistical analysis software; SB_sum of bases; SDW_shoot dry weight; SpDW_spike dry weight; V_base saturation; WY_wheat yield;

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Potassium leaching in different soils as a function of irrigation depths

Cited by 59 publications

References 15 publications

The release of macronutrients from second crop corn straw and their behaviour in a red-yellow latosol

The release of macronutrients from second crop corn straw and their behaviour in a red-yellow latosol

Fertilization with potassium (K) in the soybean-corn succession affects behavior of plants and in the soil (oxisol)

Morphological development and yield of wheat irrigated under nitrogen and potassium fertilization in Cerrado Oxisol

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