Caracterização Morfológica Em Pastos De Capim-Marandu Submetidos a Frequências De Desfolhação E Níveis De Adubação

Medica, Jéssica Abreu de Sá; Reis, Natani Silva; Santos, Manoel Eduardo Rozalino

doi:10.1590/1089-6891v18e-40460

Cited by 13 publications

(12 citation statements)

References 12 publications

(15 reference statements)

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“…High values of LBL and PL were observed at cutting height H2 (Table 2). These results at the highest cutting height corroborated with those of Medica et al (2017), since the increase in the cut-off interval provides greater time in free growth, favoring greater LBL and PL. The same author points out that in conditions of fertilization, the Marandu grass under high dose of fertilizer presents longer leaves than the lowest doses of fertilizer, regardless of the cut-off height range, and the same was observed in this study.…”

Section: Resultssupporting

confidence: 74%

Morphogenic and Structural Characteristics of Marandu Grass Affected by Fertigation With Treated Sewage Effluent and Cutting Height

Dantas¹,

Faria

Costa

et al. 2020

Eng. Agríc.

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The response of biomass flow components of forage from the interaction between fertigation with wastewater and cutting height during the year is little known. The objective of this work was to verify the responses of morphogenic and structural characteristics of Urochloa brizantha as a function of fertigation application strategies with sewage treatment plant effluent (TSE), complemented with urea (U), associated with harvest with two plant heights during the dry and rainy periods. The forage cutting heights were 30 cm (H1) and 40 cm (H2), and nitrogen fertilization doses were 9.1 (D1), 12.1 (D2), 22.5 (D3), 26.6 (D4), and 34.0 (D5) kg of N per Mg-1 of dry matter (DM) produced, applied by TSE via fertigation, plus 7.5 kg N per Mg-1 of DM produced, applied in the form of urea by cover in all treatments. Factor analyses for the dry and rainy periods identified two processes that correspond to forage mass growth and leaf development. Analysis of variance showed that treatments D5H2 and D5H1 presented superior responses over the other treatments, in the dry, and rainy periods. The treatment D5H2 stood out in the process of forage mass growth, and D5H1 in leaf development.

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Section: Resultssupporting

confidence: 74%

Morphogenic and Structural Characteristics of Marandu Grass Affected by Fertigation With Treated Sewage Effluent and Cutting Height

Dantas¹,

Faria

Costa

et al. 2020

Eng. Agríc.

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“…It is worth to highlight that, even if we did not assess the length of the pseudostem, its growth directly relates to the development of the stem. Medica et al (2017) observed that plants become higher as submitted to longer cutting intervals, due to the higher interspecific competition for the sunlight. This competition causes the elongation of the stem to expose the leaves to the higher layer of the pasture.…”

Section: Discussionmentioning

confidence: 99%

Structural and Productive Characteristics of Urochloa Cultivars Submitted to Different Defoliation Frequencies in Semiarid Region

Oliveira

Neto

Santos

et al. 2019

JAS

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This study assessed the effect of three cutting intervals (30, 45 and 60 days) on structural and production features of five different cultivars (Urochloa Brizantha: Marandu, Piatã and Xaraés; Urochloa decumbens: Basilisk; Urochloa hybrid: Mulato I). The experiment was carried out in a completely randomized design. The interaction between the defoliation frequency and the cultivars not significant to the length and width of the leaf blade, the diameter of the stem, and the number of living leaves. There was no effect of the cutting intervals on the width of the leaf blade, and the number or living leaves. The length and width of the leaf blade were highest in the Xaraés grass. The diameter of the stem, the height canopy and the forage mass grew as a function of the cutting interval. Cv. Xaraés displayed the highest heights and was the most productive. Stems and leaves masses, and the accumulation rates grew with the increase of the cutting intervals. The ratio leaf blade stem decreased as increasing the cutting intervals. Urochloa pastures should be handled with defoliation frequencies up to 45 days. Cv. Xaraés displays a high dry matter production and we suggest its use in intensive production systems.

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“…In their report, Silva et al (2009) noted that as the nitrogen fertilization increased there was a corresponding decrease in the time of the appearance of new leaves arising from an increased production of new cells, indicating the multiplication of leaf units. In fact, Rodrigues et al (2008) and Medica et al (2017) proposed that leaves are highly significant for the productive system, as they are the chief photosynthetic organs and the primary nutrient source for grazing ruminants. The number of tillers displayed a remarkable interaction between the nitrogen and potassium doses at the time of all the three cuts.…”

Section: Number Of Leavesmentioning

confidence: 99%

Interaction between nitrogen and potassium in fertilization of the piatã grass (Urochloa brizantha): productive and phytometric characteristics

Bonfim-Silva¹,

Morais²,

Pacheco³

et al. 2018

Aust J Crop Sci

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In this study, the aim was to determine the phytometric and productive features of Urochloa brizantha cv. BRS Piatã cultivated in Oxisol under the influence of the nitrogen and potassium doses applied. The completely randomized experimental design was adopted in a 5x5 factorial scheme, supplying five doses of nitrogen (0, 100, 200, 300 and 400 mg dm-3) and five doses of potassium (0, 90, 180, 270 and 360 mg dm-3), with four replications. Three shoots were cut at 30-day intervals. Plant height, number of leaves, number of tillers, leaf dry mass, stem dry mass and leaf /stem ratio were assessed. The leaf dry mass at the 370, 287 and 259 mg dm-3 doses of nitrogen in combination with the 360 mg dm-3 potassium doses revealed the biggest yields (7.8, 16.9 and 11.5 g pot-1) for the first, second and third cuts, respectively. Therefore, it was revealed that nitrogen and potassium affected the phytometric characteristics in this grass in an isolated manner by doses of nitrogen potassium. The nitrogen and potassium doses interacted positively to present significantly productive characteristics at all the three cutting procedures performed in the Piatã grass when the nitrogen to potassium ratio was maintained at about 1: 1.

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Caracterização Morfológica Em Pastos De Capim-Marandu Submetidos a Frequências De Desfolhação E Níveis De Adubação

Cited by 13 publications

References 12 publications

Morphogenic and Structural Characteristics of Marandu Grass Affected by Fertigation With Treated Sewage Effluent and Cutting Height

Morphogenic and Structural Characteristics of Marandu Grass Affected by Fertigation With Treated Sewage Effluent and Cutting Height

Structural and Productive Characteristics of Urochloa Cultivars Submitted to Different Defoliation Frequencies in Semiarid Region

Interaction between nitrogen and potassium in fertilization of the piatã grass (Urochloa brizantha): productive and phytometric characteristics

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