Disponibilidade de zinco para milho em resposta à localização de fósforo no solo

Muner, Lúcio Herzog De; Ruíz, Hugo Alberto; Venegas, Víctor Hugo Álvarez; Neves, Júlio C. L.; Freire, Fernando José; Freire, Maria Betânia Galvão dos Santos

doi:10.1590/s1415-43662011000100005

Cited by 17 publications

(15 citation statements)

References 15 publications

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“…Tito et al [38] analyzing increasing doses of zinc in beans, also found no significant effect on the weight of the roots. However, it had a significant effect on the dry mass of stems and grains, corroborating [39] that researched about corn, and disagreeing with [40] for the cultivation of sorghum. Regarding Cr, [41] observed that the reduction in dry matter of shoots and roots of soybeans occurred at 40 mg Cr +3 L −1…”

Section: Resultssupporting

confidence: 71%

Effect of Copper, Zinc, Cadmium and Chromium in the Growth of Crambe

Tito¹,

Chaves²,

Fernandes³

et al. 2014

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Crambe is a promising crop for biodiesel production. However, there is no much information available about techniques and research regarding the best performance in different regions to explore its potential. The objective of this study was to evaluate the effect of cadmium, chromium, copper and zinc in the development of crambe. The study was carried out in a greenhouse and it consisted of four independent experiments in completely randomized design, with three replications. Four metals with five levels were applied: 0, 10, 15, 20 and 25 mg•kg −1 for copper, cadmium, chromium; and 0, 20, 30, 40 and 50 mg•kg −1 for zinc, in order to evaluate the growth of crambe. Data were subjected to analysis of variance and comparison of means by Tukey test at 1 and 5% significance. Despite doses of cadmium, chromium, copper and zinc in growing crambe have influenced in some of the evaluated variables of the plants, in general, their development was similar in relation to doses and the metals applied. The importance of cultivating crambe is related to grain production, based on this, copper and cadmium decreased this production.

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Section: Resultssupporting

confidence: 71%

Effect of Copper, Zinc, Cadmium and Chromium in the Growth of Crambe

Tito¹,

Chaves²,

Fernandes³

et al. 2014

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“…os maiores incrementos nas variáveis fenológicas ocorreram para 60 -75 mg de P dm -3 no substrato. a aplicação de doses crescentes de P provocou aumento linear no teor de P disponível no substrato, independentemente da adubação com zinco (Figura 1a Muner (2011), plantas bem supridas em P e zn apresentam expressivas médias de massa seca e produção. contudo, plantas adubadas com P, na ausência de aplicação de zn, demonstraram sinais de toxidez de P, em virtude do acúmulo desse nutriente no tecido e da ineficiência de utilização pela planta, o que possivelmente está relacionado ao efeito sinegístico desempenhado pelo zn.…”

Section: Resultsunclassified

Crescimento inicial de pitaia em função de combinações de doses de fósforo-zinco

et al. 2014

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Com o objetivo de avaliar a interferência da relação fósforo-zinco sobre o crescimento inicial de pitaia para fornecer informações que subsidiem a definição de sistemas de produção mais adequados para a exploração desta cultura no Brasil, realizou-se o experimento, testando cinco doses de P (0; 75; 150; 225 e 300 mg dm-3) e Zn (0; 2; 4; 6 e 8 mg dm-3), sendo os níveis de cada nutriente arranjados em esquema fatorial 5x5, com quatro blocos. Para a interação significativa (p<0,05), procedeu-se ao ajuste em superfícies de resposta do tipo Y = β0 + β1(A) + β2(A)² + β3(B) + β4(B)² + β5(A).( B) + e. As estimativas das correlações fenotípicas foram obtidas considerando apenas o intervalo das doses de P e Zn que promoveram as melhores respostas do acesso de pitaia para os caracteres estudados. A aplicação de P e Zn, e a interação P x Zn afetam a disponibilidade de ambos os nutrientes no substrato, sistema radicular e parte aérea, influenciando, assim, o crescimento inicial de plantas de pitaia. Os rendimentos mais satisfatórios ocorrem quando há 60 - 75 mg de P dm-3 e 3,0 - 4,0 mg de Zn dm-3 no substrato, e 4,5 - 6,0 g kg-1 de P e 150 mg de Zn kg-1 na parte aérea. Esses níveis foram obtidos para a combinação de 150 - 225 mg dm-3 de P, com 4 - 6 mg dm-3 de Zn. Os teores de P e Zn na parte aérea e o somatório do comprimento dos cladódios (SCC) säo os caracteres explicativos que apresentam maiores efeitos diretos sobre a massa seca dos cladódios (MSC).

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“…Values increased and corresponded to 21.23 and 22.21 mg kg -1 when the dose was halved and when the dose was absent, respectively. The use of high P doses could impair the assimilation of the Zn micronutrient (MUNER et al, 2011) wherein the deficiency is relatively common mainly due to the low amount in the cerrado soils (VENDRAME et al, 2007). Table 5.…”

Section: Resultsmentioning

confidence: 99%

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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Disponibilidade de zinco para milho em resposta à localização de fósforo no solo

Cited by 17 publications

References 15 publications

Effect of Copper, Zinc, Cadmium and Chromium in the Growth of Crambe

Effect of Copper, Zinc, Cadmium and Chromium in the Growth of Crambe

Crescimento inicial de pitaia em função de combinações de doses de fósforo-zinco

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

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