Efeito da adubação com fósforo do capim Mombaça em solos com texturas arenosa e argilosa

Oliveira, Paulo Sérgio Rabello de; Deminicis, Bruno Borges; Castagnara, Deise Dalazen; Gomes, F. C.

doi:10.4321/s0004-05922012000300008

Cited by 8 publications

(9 citation statements)

References 15 publications

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“…The quantity of P in the soil after the application of phosphate fertilizer can directly influence the response of the plant, the crops being capable of adapting according to the quantity of this nutrient in the soil solution (Oliveira el al., 2011). Similar results have been reported in the literature, some researches like Oliveira et al (2012), studying soils with different P absorption capacities reported that the plant absorbs less P in soil with a greater quantity of clay in comparison to a sandy soil, because of the greater competition between the soil and the plant for the nutrient (P), the plant perfects the use of P in the production of dry matter. The increase in dosages of phosphate brings about a greater response in the plant in relation to the dry matter, in that the 150 mg dm -3 dosage (moderate dosage) the production of dry matter was not affected by the soil (Figure 4b).…”

Section: Second Cycle Of Sugar Canesupporting

confidence: 88%

Natural Phosphate and Humic Substances Applied In Quartzipsamment and Kandiudult Cultivated with Sugar Cane

Bezerra¹,

Prado²,

Shigaki³

2015

JAES

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It is known that use of natural reactive phosphate associated with humic substances will be able to increase phosphorus absorption the the efficiency of phosphate fertilization in the production of sugar cane.Objective of this study is to evaluate the effects of phosphorus levels in the absence and presence of enriched peat extract with humic substances. The study was conducted in a greenhouse in the municipality of Chapadinha, in the state of Maranhão, Brazil, in an entirely randomized 2x2x3+2 delineation with three repetitions in Quartzipsamment and Kandiudult, in the absence and presence of 520 L ha-1 of the peat extract, three doses of phosphorus (75, 150 and 300 mg dm-3) in the natural reactive phosphate form and two controls. The experimental unit consisted of a vase filled with 20kg of soil containing a RB867515 of sugar cane. The accumulation of phosphorus and dry matter on the aerial part of the sugar cane were evaluated, 180 days after planting and 120 days after the first cutting. The associated natural phosphate and humic substances demonstrated greater increments in the sugar cane for the two cycles and different soils compared to the isolated phosphate.

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Section: Second Cycle Of Sugar Canesupporting

confidence: 88%

Natural Phosphate and Humic Substances Applied In Quartzipsamment and Kandiudult Cultivated with Sugar Cane

Bezerra¹,

Prado²,

Shigaki³

2015

JAES

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“…In the present study, liming increased the benefit of phosphorus fertilisation by 45 and 30% in the second and third cuttings, respectively, thereby contributing to pasture quality since leaf blades are the morphological parts of forage grasses with the highest crude protein content and are thus preferred by grazing animals (CECATO et al, 2014). These results corroborate those found by Teles et al (2011) and Oliveira et al (2012), who observed positive responses in GBDM yield of Brachiaria brizantha cv. MG-4 and Panicum maximum cv.…”

Section: Yield Characteristicssupporting

confidence: 82%

Lime and phosphate application as mycorrhizae stimulation to enhance growth and yield of Marandu grass

Santiago

Nóbrega

Santiago

et al. 2017

SCA

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Pastures are important food sources for Brazilian cattle herds. However, inadequate management of soil fertility has emerged as a major cause of low yield rates and of progressive degradation of these areas. The objective of the present study was to evaluate growth, by means of morphogenetic and structural characteristics, and yield of Brachiaria brizantha Stapf. cv. Marandu as functions of the application of the mycorrhizae stimulant formononetin, associated with lime and phosphate application. The experimental design was completely randomised with four replications, and the treatments were arranged in a 2 x 2 x 5 factorial scheme, consisting of two liming treatments (with and without limestone), two formononetin treatments (with and without application) and five P 2 O 5 doses (0, 25, 50, 100 and 200 mg dm -3 ). Three shoot cuttings were carried out after a first standardisation cutting to evaluate the morphogenetic and structural characteristics as well as the dry matter yield of different morphological fractions. Liming and phosphate application at the dose of 141 mg dm -3 P 2 O 5 increased growth and yield of Marandu grass, and these practices are essential for the cultivation of this pasture grass in Yellow Latosol of the Cerrado region of Piauí, Brazil. The application of formononetin increased stem elongation rate, total number of tillers and green stem dry matter, and decreased dead dry matter of Marandu grass, which are effects that contribute to the improvement of pasture quality. Key words: Brachiaria brizantha. Mycorrhizae. Pastures. Soil acidity. ResumoAs pastagens constituem importante fonte alimentar para os rebanhos brasileiros, entretanto, o manejo inadequado da fertilidade dos solos têm-se destacado como uma das principais causas dos baixos índices produtivos e da progressiva degradação destas áreas. O objetivo do presente estudo foi avaliar o crescimento, através das características morfogênicas e estruturais, e a produção da Brachiaria brizantha Stapf. cv. Marandu em função da aplicação do estimulante de micorrização formononetina associado a calagem e a fosfatagem. O delineamento experimental adotado foi o inteiramente casualizado, com quatro repetições, sendo os tratamentos dispostos num esquema fatorial 2 x 2 x 5, constituídos por dois tratamentos de calagem (com e sem calcário), dois de formononetina (com e sem aplicação) e cinco doses de P 2 O 5 (0, 25, 50, 100 e 200 mg dm -3 ). Foram realizados três cortes da parte aérea, após um primeiro corte de uniformização, para realização das avaliações das características morfogênicas e estruturais, bem como a produção de massa seca das diferentes frações morfológicas. A calagem e a fosfatagem na dose de 141 mg dm -3 de P 2 O 5 incrementaram o crescimento e a produção do capimMarandu, devendo ser práticas indispensáveis ao cultivo desta forrageira em Latossolo Amarelo do Cerrado piauiense, Brasil. A aplicação de formononetina promoveu aumento da taxa de alongamento do colmo, número total de perfilho, massa seca de colmo verde e diminuiu a...

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“…The preferential allocation of P in the stem is because of the highest daily increase in stem biomass and the highest SPC in comparison to LPC (Table 2). As the plant grows there is a greater investment in stem biomass, allowing stem elongation in order to improve the distribution of photosynthetically active radiation inside the canopy (PARSONS et al, 2011). With this, there is a preferential allocation of nutrients to the plant's stem, as observed in the present study.…”

supporting

confidence: 69%

“…For the transition and dry seasons, there was a certain isonomy in the partition of P between the canopy fractions; however, from the age 45 DAC to harvest in the dry season the plant partitioned more P to the leaf ( Figure 3B). This response may be related to the increase in leaf area index from 1.90 to 2.70, observed between ages 54 and 63 DAC, and a consequent increase in leaf biomass, indicating that rainfall occurred at the end of the dry season (Figure 1), which stimulated plant growth and demanded a higher amount of P, as this is fundamental in energy metabolism and biomass production (OLIVEIRA et al, 2012;DIAS et al, 2015). A larger partition of K was observed in the stem of elephant grass cv.…”

mentioning

confidence: 99%

Accumulation and partition of macronutrients in Pennisetum purpureum cv. Roxo managed under different growth ages and seasons

Maranhão

Cândido

Soares

et al. 2018

Rev. bras. saúde prod. anim.

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SUMMARY The objective of this study was to evaluate the macronutrient accumulations in leaf, stem, and shoot of elephant grass cv. Roxo. The treatments consisted of seven growth ages (9, 18, 27, 36, 45, 54, and 63 days) and three growing seasons (rainy, transition, and dry). A completely randomized design and a split-plot time arrangement were used, where the ages were the plots and the seasons the subplots, with three replications. Interaction between the factors age and season of cultivation for the contents and the daily accumulation rates of N, P, K, Ca, Mg, and S in leaf, stem, and shoot fractions were calculated. The margins of daily accumulation of nutrients N, P, K, Mg, and S presented positive linear behavior in all seasons studied; however, with variation in the magnitude of the response between them. The daily accumulation rate of Ca in the canopy was adjusted to a linear model for the rainy and dry seasons and to a quadratic model for the transition season, reaching a maximum of 4.60 kg ha-1 at 59.76 days of growth. The accumulation of nutrients in elephant grass cv. Roxo showed the following decreasing order: K > N > P > Mg > Ca > S in the rainy and transition seasons, while in the dry season the following decreasing order was observed: K > P > N > Ca > Mg > S.

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Efeito da adubação com fósforo do capim Mombaça em solos com texturas arenosa e argilosa

Cited by 8 publications

References 15 publications

Natural Phosphate and Humic Substances Applied In Quartzipsamment and Kandiudult Cultivated with Sugar Cane

Natural Phosphate and Humic Substances Applied In Quartzipsamment and Kandiudult Cultivated with Sugar Cane

Lime and phosphate application as mycorrhizae stimulation to enhance growth and yield of Marandu grass

Accumulation and partition of macronutrients in Pennisetum purpureum cv. Roxo managed under different growth ages and seasons

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