Nitrogen and potassium in the cultivation of Piatã grass in Brazilian Cerrado soil

Morais, Léa P. V. X. C. de; Bonfim-Silva, Edna Maria; Pacheco, Adriano Bicioni; Abreu, Joadil Gonçalves de; Silva, Tonny José Araújo da; Polizel, Analy Castilho

doi:10.1590/1807-1929/agriambi.v20n11p984-989

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…For leaves, NUE also had a slight increase (10.3%), but this difference was not enough to be detected by Tuckey test at p ≤ 0.05. The observed tendency of NUE increase with K dose is related to the fact that K is responsible for activation of many enzymes in plant N uptake and photosynthesis, translocation of assimilates and protein synthesis (Prajapati & Modi, 2012;Morais et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…Antelope grass is considered an invasive species (López Rosas et al, 2015), that may lead to future environmental problems. Pasture grasses usually are very responsive to N availability in the soil (Paiva et al, 2012;Costa et al, 2013;Gazola et al, 2019), and this response can be more evident under suitable K supply (Prajapati & Modi, 2012;Sanchês et al, 2013;Morais et al, 2016). In addition, antelope grass plant characteristics (Clayton et al, 2006) are very different from those of capimaçú (Machado et al, 2013), which may lead to differences in plant growth responses to N and K fertilization.…”

Section: Introductionmentioning

confidence: 99%

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The amazonian capim-açú is less nitrogen dependente than antelope grass to produce leaf dry matter

Araújo

Cazetta

Rodrigues

et al. 2021

Rev. bras. eng. agríc. ambient.

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The Maranhão floodplain is dominated by native grasses like capim-açú (Paspalum plicatulum, Mich.). Due to scarce information on nutrient demands of native species, farmers are replacing native pastures by exotic and potentially invasive species such as antelope grass (Echinochloa pyramidalis, Lam). The aim of this study was to compare the growth of capim-açú and antelope grass, under varying N and K doses, to better understand the potential of capim-açú to be used as forage. The experiment was carried out in pots, consisting of a 2 × 5 × 2 factorial scheme (2 species × 5 N doses × 2 K doses) with four repetitions, in a completely randomized design. The N doses of 0, 50, 100, 150 and 200 mg dm-3 were combined with 10 and 30 mg dm-3 K2O. The capim-açú produces higher leaf to stem ratio aboveground by using lower nitrogen and potassium doses than antelope grass. Leaf, stalk, and total dry matter production of both studied species do not respond to potassium doses.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The amazonian capim-açú is less nitrogen dependente than antelope grass to produce leaf dry matter

Araújo

Cazetta

Rodrigues

et al. 2021

Rev. bras. eng. agríc. ambient.

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“…In the assimilation of sulfur, potassium activates an enzyme that participates as an enzyme activator in cysteine synthesis (Yang et al, 2007) and therefore, the synergism when these two nutrients were used. Similarly, potassium is also able to increase the efficiency of nitrogen functions in the plant, thus, when potassium is associated with nitrogen fertilization, there is an increase in the production of forage mass (MORAIS et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, fertilization with potassium associated with nitrogen increases the potassium concentration in the leaf of Urochloa brizantha cv. BRS Piata (MORAIS et al, 2016) and crude protein in Urochloa brizantha cv. Xaraes (OLIVEIRA et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Morphological characteristics and production of Xaraes and Zuri grass fertilized with combinations of sulfur and potassium

Mota¹,

Lourenço²,

Motta³

et al. 2021

Bol. Ind. Anim.

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Sulfur and potassium are essential elements for the development of forages as part of protein synthesis, nutrient transport, activation of photosynthesis enzymes and stomatal activity. Thus, this study aimed was to evaluate the production and morphology of Xaraes grass (Urochloa brizantha cv. Xaraes) and Zuri grass (Megathyrsus maximus cv. Zuri) fertilized with combinations of sulfur (S) and potassium (K) (only S, only K, with S and K, and without both), and identify which of these nutrients should be prioritized in maintenance fertilization. Two experiments were conducted in the greenhouse, in a completely randomized design. The first experiment was utilized the Xaraes grass and the second experiment the Zuri grass. Each experimental plot consisted of 5 dm3 pots with five plants per pot. All treatments were fertilized 200 mg/dm3 per pot with nitrogen. On treatments fertilized with sulfur it were applied ammonium sulfate (21% N and 24% S) as nitrogen supply, thus, it was applied 228 mg/dm3 of sulfur per plot. On treatments without sulfur, the nitrogen source was urea (46% N). The treatments with potassium were fertilized 100 mg/dm3 with potassium, utilizing potassium chloride (58% K2O). The harvest was performed when the plants reached the height of 35 and 75 cm, for xaraes and zuri respectively. For Xaraes grass, the fertilization with S and K in different combinations had a significant effect (P<0.05) on forage mass, leaves number and tillers per pot, individual tiller mass, leaf blade, stem + sheath, and dead material, as well as relative forage mass. For Zuri grass, the combinations of S and K showed statistical difference (P<0.05) just on leaf blade mass and dead material, and the number of leaves per pot, as well as on relative leaf blade mass. Based on the results obtained in the two experiments, the S and K combination in the maintenance fertilization of xaraes grass improves the forage development, however, S does not increase the productive indexes of zuri grass.

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“…The thinning was performed ten days after sowing, maintaining five plants per vase. Nitrogen and potassium fertilization, in the form of urea and potassium chloride, were applied with doses of 100 and 70 mg dm -3 for the BRS Piatã palisadegrass, and 200 and 70 mg dm -3 for BRS Quênia guineagrass, respectively [7,8,9].…”

Section: Methodsmentioning

confidence: 99%

Investigating the Optimal Day for Nitrogen Fertilization on Piatã palisadegrass and Quênia guineagrass after Defoliation

Faria

Avelino

Cabral³

et al. 2019

JEAI

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Considering that nitrogen is the main macronutrient limiting pasture productivity, the aim of this study was to investigate the most appropriate day for nitrogen fertilization of the grasses Brachiaria brizantha BRS Piatã and Panicum maximum BRS Quênia. The experiment was conducted in a greenhouse in the city of Rondonópolis, located in the state of Mato Grosso, Brazil, using a completely randomized design. The treatments consisted of five nitrogen fertilization periods: 0; 2; 4; 6 and 8 days after defoliation. The dry mass of the leaf blade (DMLB), dry mass of stem + sheath (DMSS), dry mass of residue (DMRES) and root dry mass (RDM) were evaluated. The non-structural carbohydrate of the grass roots was also quantified. The later nitrogen fertilization after defoliation reduced DMLB (P< .01) and DMSS (P< .01) of the BRS Piatã palisadegrass, and DMRES of both grasses (P< .01). Higher levels of water soluble carbohydrates were observed when nitrogen fertilization was performed on grass cutting (day 0). Nitrogen fertilization of the BRS Piatã palisadegrass close the time of defoliation is recommended. For Quênia guineagrass, nitrogen can be applied between the cutting day and the eighth day after defoliation. For the root system, there is a higher content of water soluble carbohydrates in the BRS Piatã palisadegrass and greater accumulation of starch in the BRS Quênia guineagrass.

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Nitrogen and potassium in the cultivation of Piatã grass in Brazilian Cerrado soil

Cited by 9 publications

References 9 publications

The amazonian capim-açú is less nitrogen dependente than antelope grass to produce leaf dry matter

The amazonian capim-açú is less nitrogen dependente than antelope grass to produce leaf dry matter

Morphological characteristics and production of Xaraes and Zuri grass fertilized with combinations of sulfur and potassium

Investigating the Optimal Day for Nitrogen Fertilization on Piatã palisadegrass and Quênia guineagrass after Defoliation

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