Produção de massa seca e nutrição de cultivares de arroz de terras altas sob condição de déficit hídrico e adubação silicatada

Mauad, Munir; Crusciol, Carlos Alexandre Costa; Filho, Hélio Grassi

doi:10.5433/1679-0359.2011v32n3p939

Cited by 23 publications

(33 citation statements)

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“…when under severe drought all plants shown lower N content, in comparison to non stressed plants (Figure 3a), what is in accordance to results found for rice (Mauad;Grassi Filho, 2011) and wheat (Sun et al, 2012). The N content in culm tended to increase in RB plants under moderate water potential, while there was no significant variation (P≤0.05) in culms of plants from other studied genotypes (Figure 3b).…”

Section: Resultssupporting

confidence: 80%

“…Taking into account that the soil water potential was reduced (from ΨNR to ΨS), the reduction of both concentration and accumulation of N and P were already expected in plants subjected to this very low soil water potentials (Figure 3a, 3b, 4a). Were also observed lower levels of N and P in shoots of canola, soybean and wheat plants subjected to intense water deficit (Mauad;Grassi Filho, 2011;Sun et al, 2012;Ali, 2013). The lower levels of N in the leaves and stems (Figure 3 a and b), in comparison to the that observed for P (Figure 4a), may be due to the low transpiration rate (Figure 6b), since it is known that this variable is responsible for regulating the mass flow process, which is preferably used by N to contact with plant roots (Bonfim-Silva; Anicésio; Silva, 2013;Matimati;Verboom;Cramer, 2013).…”

Section: Resultsmentioning

confidence: 99%

“…This ability is especially decisive in initial plant development, when the root system is still under formation (Zhao;Glaz;Comstock, 2010). Certainly the drought affects directly or indirectly the absorption and use of all mineral nutrients by plants (Mauad;Grassi Filho, 2011). However, considering that the macronutrientes are required in large amounts to keep plant growth, the absorption of these elements would be greatly impaired under stressful conditions limiting plant production.…”

Section: Introductionmentioning

confidence: 99%

“…However, the biological phenomena, as the root growth, evapotranspiration, nutrient uptake and its transport and use by the plants, may be very related to specific characteristics of each genotype. Some studies with soybean (Mauad;Grassi Filho, 2011), wheat (Sun et al, 2012) and canola Ali, 2013), suggest that the degree of drought tolerance may be related to the ability of absorption and accumulation of mineral nutrients by plants, when subjected to low soil moisture conditions. In general, drought tolerance is the characteristic of a plant species, or of different varieties of the same species, to adapt in environments with low water potentials (Pincelli;Silva, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Drought-induced alterations in the uptake of nitrogen, phosphorus and potassium, and the relation with drought tolerance in sugar cane

et al. 2017

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Alterações induzidas pela seca na absorção de nitrogênio, fósforo e potássio, e as relações com a tolerância da cana-de-açúcar ao deficit hídrico July, 19, 2016 and approved in November 23, 2016 ABSTRACTAlthough there are evidences that the proper supply of mineral nutrients to plants relieves water stress, little is known on the approach of how the drought affects the absorption and accumulation of nutrients by distinct sugar cane genotypes, or in different parts of a same plant. Thus, the objective of this study was to determine the content and accumulation of N, P and K in the aerial part of plant from three genotypes of sugar cane, submitted to three water potentials in the soil, and check the relationship of these variables with the tolerance of plants to prolonged drought. In order to access this objective, an experiment under greenhouse conditions, comprised by a fatorial 3 × 3, in a randomized block design, and four replicates was carried out. After 90 days from treatment imposition, the plant transpiration rate, plant dry mass, concentration of N, P and K were determined in leaves and culms, as well as in total plant shoot were measured. It was found that tolerance to drought in sugar cane is related to higher levels of N and K in the leaves and stems, and larger accumulations of K and P in the plant shoot. There is high positive correlations among accumulation of N, P and K in the plant shoot and dry matter production by plants submitted to drought. There are intermediate correlations among plant transpiration and nutrient uptake by plants under drought. Plants of the genotype SP81-3250 are more tolerante to prolonged drought, than the RB855453 and IACSP95-5000 plants.Index terms: Saccharum officinarum L.; water limitations; mineral nutrition; soil water potentials; plant growth. RESUMOEmbora existam evidências de que o adequado fornecimento de nutrientes minerais para plantas alivia o estresse hídrico, pouco se sabe sobre a abordagem de como a seca afeta a absorção e acumulação de nutrientes por distintos genótipos de cana-de-açúcar, ou por diferentes partes de uma mesma planta. Assim, o objetivo deste estudo foi determinar o teor e acúmulo de N, P e K na parte aérea da planta de três genótipos de cana-de-açúcar, submetidos a três potenciais hídricos do solo e verificar se existe relação dessas variáveis com a tolerância das plantas ao déficit hídrico prolongado. Para isso, foi realizado um experimento em casa de vegetação, em um esquema fatorial 3×3, em delineamento de blocos casualizados, com quatro repetições. Após 90 dias da imposição dos tratamentos, foi determinada a massa seca e a taxa de transpiração das plantas, a concentração de N, P e K nas folhas e colmos, além do acúmulo desses nutrientes na parte aérea das plantas. Verificou-se que a tolerância à seca em cana está relacionada com níveis mais altos de N e K nas folhas e caules e maiores acumulações de K e P na parte aérea das plantas. Existem fortes correlações positivas entre acúmulo de N, P e K na parte aérea das plantas e produção...

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Drought-induced alterations in the uptake of nitrogen, phosphorus and potassium, and the relation with drought tolerance in sugar cane

et al. 2017

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“…Embora não faça parte do grupo de elementos essenciais para as plantas, relatos na literatura têm demonstrado o efeito benéfico do silício em várias espécies, como no arroz (MAUAD; CRUSCIOL; GRASSI FILHO, 2011), na cana-de-açúcar (SOUZA; KORNDÖRFER; WANGEN, 2010) e em gramíneas forrageiras (SÁVIO et al, 2011).…”

Section: Introductionunclassified

Deposição de sílica e teor de nitrogênio e silício em arroz

et al. 2013

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ResumoA adubação nitrogenada é pratica importante para alcançar altas produtividades, entretanto doses elevadas de nitrogênio podem causar tombamento e tornar as plantas mais suscetíveis a doenças. Numerosos estudos têm demonstrado que muitas gramíneas acumulam silício em seus tecidos, e que a maior parte deste elemento é depositado na folha, o que funcionária como uma barreira mecânica a entrada de doenças. Entretanto elevadas doses de nitrogênio podem diminuir a deposição de sílica nas plantas. O objetivo deste trabalho foi avaliar o teor de nitrogênio e silício na parte aérea, e a deposição de sílica em folhas de plantas de arroz de terras altas em função das doses de Si e N. O delineamento experimental utilizado foi inteiramente casualizado, em esquema fatorial 3 x 2, com cinco repetições. Os tratamentos foram constituídos por três doses de N (5, 75 e 150 mg dm -3 de N) tendo como fonte a uréia e duas doses de Si (0 e 400 mg dm -3 de SiO 2 ) tendo como fonte o silicato de cálcio (Wollastonita). O incremento da adubação com uréia reduziu o teor de Si na planta de arroz e a deposição de sílica na parede externa das células da epiderme das folhas de arroz. Palavras-chave: Oryza sativa, adubação e anatomia vegetal AbstractThe nitrogen fertilization is an important practice to reach high productivity, however, nitrogen high level can cause lodging and make the plants more sensitive to disease. Numerous studies has demonstrate that a lot of grasses accumulate silicon at its tissues, and the biggest part of this element is deposited on the leaf, that would work like a mechanical barrier to diseases come in. However, high levels of nitrogen can reduce the silica deposition at the plants. The objective of this study was to evaluate silicon and nitrogen content in shoot and silica deposition in upland rice leaf as a result of Si and N levels. The experimental design used was completely randomized in factorial schema 3 x 2 with five replications. The treatments consisted from levels of N (5, 75 and 150 mg dm -3 of soil) in urea form and two levels of SiO 2 (0 e 400 mg dm -3 ) in calcium silicate form (Wollastonita). The increased of urea fertilization reduced the silicon content of rice plants and the silica deposition at the external cells wall the epidermal rice leafs.

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Mineral Nutrition of Plants Under Soil Water Deficit Condition: A Review

Bhattacharya

2021

Soil Water Deficit and Physiological Issues in Plants

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Produção de massa seca e nutrição de cultivares de arroz de terras altas sob condição de déficit hídrico e adubação silicatada

Cited by 23 publications

References 7 publications

Drought-induced alterations in the uptake of nitrogen, phosphorus and potassium, and the relation with drought tolerance in sugar cane

Drought-induced alterations in the uptake of nitrogen, phosphorus and potassium, and the relation with drought tolerance in sugar cane

Deposição de sílica e teor de nitrogênio e silício em arroz

Mineral Nutrition of Plants Under Soil Water Deficit Condition: A Review

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