scholarly journals Nutrient accumulation at the initial growth of pitaya plants according to phosphorus fertilization

2016 ◽  
Vol 46 (3) ◽  
pp. 230-237 ◽  
Author(s):  
Rodrigo Amato Moreira ◽  
Maria do Céu Monteiro da Cruz ◽  
Denison Ramalho Fernandes ◽  
Enilson de Barros e Silva ◽  
Jéssica de Oliveira
Keyword(s):  
Nutrient Uptake ◽  
Phosphorus Fertilization ◽  
Initial Growth ◽  
Nutrient Accumulation ◽  
Adequate Nutrition ◽  
Fertilizer Recommendation ◽  
Macro And Micronutrients ◽  
Maximum Expression

ABSTRACT The knowledge about the amount of nutrient uptake in pitaya plants helps the balanced fertilizer recommendation for the crop, providing adequate nutrition and contributing to the maximum expression of this species potential. This research was carried out in order to evaluate the growth, nutrient accumulation and efficiency of absorption, transportation and use of P by pitaya according to phosphorus fertilization. A randomized blocks design was used, with five doses of P (0 mg dm-3, 20 mg dm-3, 40 mg dm-3, 80 mg dm-3 and 160 mg dm-3) incorporated into the soil, with four replications, three pots per plot and one cutting per pot. Differences in the nutrient accumulation of all doses were evident in the pitaya shoots and roots, as well as in the efficiency of absorption, transport and use of P, according to phosphorus fertilization. The nutrient accumulation in the pitaya roots was ranked in the following order: N > K > Ca > S > P > Mg > Fe > Mn > Zn > B ≥ Cu. For the shoots, the order was: K > N > Ca > S > Mg > P > Mn > Fe > Zn > B ≥ Cu. The initial growth of pitaya plants was maximum with 81 mg dm-3 of P, in a Red-Yellow Dystrophic Latosol. The application of 44-67 mg dm3 of P to the soil promoted the highest accumulation of macro and micronutrients in the pitaya.

scholarly journals Production and Nutrient Accumulation of Common Bean Cultivars under Competition with Weed

2019 ◽  
Vol 37 ◽  
Author(s):  
C.G. COELHO ◽  
L.P. DALVI ◽  
L.S.G. OLIVEIRA ◽  
F.L. OLIVEIRA
Keyword(s):  
Grain Yield ◽  
Common Bean ◽  
Chlorophyll Content ◽  
Nutritional Quality ◽  
Initial Growth ◽  
Nutrient Accumulation ◽  
Randomized Design ◽  
Crop Cycle ◽  
Bean Yield ◽  
Completely Randomized Design

ABSTRACT: Improper management of weeds is one of the causes of low bean yield, as it is very susceptible to interference due to their slow initial growth. This study aimed to evaluate the influence of dayflower on grain yield and nutrient accumulation of bean cultivars. The experiment was carried out in a screened house, in 5 L pots, in a 2 x 4 factorial scheme. Factor 1 corresponded to the presence or absence of weeds, and factor 2 bean cultivars: BRS Pontal, BRS Agreste, BRS Ametista and BRS Estilo. The experiment was arranged in a completely randomized design with five replications. The coexistence of bean and weed was maintained throughout the crop cycle. Chlorophyll content, number of pods per plant, number of grains per plant, nutrients contents (N - nitrogen, P - phosphorus, K - potassium, Ca - calcium, Mg - magnesium, Mn - manganese, Fe - iron and Zn - zinc) in grains were evaluated. Competition with weeds negatively influenced chlorophyll content, number of pods, yield and N content in grains. The interaction was significant to P, Mg and Fe contents in grains, demonstrating that competition with weeds may impair allocation of these nutrients, resulting in grains of inferior nutritional quality. The cultivar BRS Agreste was more efficient to accumulate P and Mg in grains in competition with dayflower.

scholarly journals Crescimento inicial da berinjeleira sob adubação nitrogenada e fosfatada e irrigada com água de reúso

2015 ◽  
Vol 10 (3) ◽  
pp. 34 ◽  
Author(s):  
Aldair de Souza Medeiros ◽  
Reginaldo Gomes Nobre ◽  
Eliane da Silva Ferreira ◽  
Whalamys Lourenço de Araújo ◽  
Manoel Moises Ferreira de Queiroz
Keyword(s):  
Reclaimed Water ◽  
Weather Conditions ◽  
Dry Mass ◽  
Industrial Sector ◽  
Treated Wastewater ◽  
Intermittent Flow ◽  
Phosphorus Fertilization ◽  
Initial Growth ◽  
Nitrogen And Phosphorus ◽  
Sand Filter

<p><span>A utilização da água vem gerando alguns conflitos devido o aumento da escassez hídrica em todo o mundo, os setores de maior consumo são a agricultura responde por 70%, o setor industrial 22% e 8% corresponde ao uso doméstico. Objetivou-se com este trabalho avaliar os efeitos causados pelas doses de nitrogênio e fósforo e a irrigação com água de reúso doméstica pós-tratada em filtro de areia com fluxo intermitente durante o crescimento inicial da berinjeleira na região semiárida paraibana. O experimento foi realizado em ambiente protegido, no Centro de Ciências e Tecnologia Agroalimentar (CCTA/UFCG), Campus de Pombal – PB, e cujos tratamentos resultaram na combinação de dois fatores: quatro doses de adubação nitrogenada (N<sub>1 </sub>- 3,55; N<sub>2</sub> - 6,2; N<sub>3</sub> - 8,9; N<sub>4</sub> - 11,55 g de N/vaso) e quatro doses de adubação fosfatada (P<sub>1</sub> - 15,28; P<sub>2</sub> - 26,74; P<sub>3</sub> - 38,2; P<sub>4</sub> - 49,66 g de P/vaso) correspondendo respectivamente a 40; 70; 100; 130% conforme indicação de adubação para a cultura da berinjela quando cultivada em vasos, irrigada com água de reúso pós-tratada em filtro de areia intermitente (AR). O delineamento experimental adotado foi o de blocos inteiramente casualizados, com os tratamentos arranjados em esquema fatorial 4 x 4, com quatro repetições. Conclui-se que a prática da irrigação com água de reúso surge como uma fonte hídrica e nutricional para a cultura da berinjela, nas condições edafoclimáticas do semiárido; Doses de 3,55 g de N e 15,28 g de P por planta quando se utiliza água de reúso na irrigação de plantas de berinjela são suficientes para suprir as necessidades nutricionais da cultura. A massa fresca da folha de plantas de berinjela decresceu linearmente com o incremento das doses de N aplicadas. A produção de massa fresca e seca da parte aérea de plantas de berinjela irrigadas com água de reúso com 40% da adubação com N e P não diferiu das plantas que receberam 100% indicação de N e P.</span></p><p align="center"><strong><em>Eggplant early growth under nitrogen and phosphate and irrigated with reuse water</em></strong></p><p><strong>ABSTRACT - </strong>The use of water has generated some conflicts due to increasing water scarcity around the world, the largest consumer sectors are agriculture accounts for 70 %, the industrial sector 22% and 8% corresponds to the household. The objective of this study was to evaluate the effects caused by nitrogen and phosphorus and irrigation with reclaimed water post- treated domestic sand filter with intermittent flow during the initial growth of eggplant in Paraíba semi-arid region.The experiment was conducted in a greenhouse, in the Science and Technology Center Agrifood (CCTA / UFCG), Campus de Pombal - PB, and the treatments resulted in the combination of two factors: four doses of nitrogen (N1 - 3.55; N2 - 6.2; N3 - 8.9; N4 - 11.55 g N / pot) and four doses of phosphorus fertilization (P1 - 15.28; P2 - 26.74; P3 - 38.2; P4 - 49 66 g P / pot) corresponding respectively to 40; 70; 100; 130% as fertilizer indication for eggplants when grown in pots irrigated with treated wastewater post-intermittent sand filter (AR). The experimental design was a completely randomized design, with treatments arranged in a factorial 4 x 4, with four replications. We conclude it the practice of irrigation with reclaimed water emerges as a water and nutrient source for the eggplant crop, soil and weather conditions in the semiarid; Doses of 3,55 g of N and 15,28 g P per plant when using reclaimed water in irrigation eggplants are sufficient to meet the nutritional needs of the crop. The fresh weight of eggplants sheet decreased linearly with increasing N rates. The production shoot fresh and dry mass of eggplant plants irrigated with reclaimed water to 40% of fertilization with N and P did not differ from plants that received 100 % of N and P indication.</p><p><span><br /></span></p>

scholarly journals Nutrient Stocks and Distribution in Ghanaian Cocoa Ecosystems

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
A. M. Mohammed ◽  
J. S. Robinson ◽  
A. Verhoef ◽  
D. J. Midmore
Keyword(s):  
Eastern Region ◽  
Nutrient Element ◽  
Sharp Distinction ◽  
Fertilizer Recommendation ◽  
Nutrient Stocks ◽  
Nutrient Stock ◽  
Cocoa Production ◽  
Macro And Micronutrients ◽  
Cocoa Tree ◽  
Main Factor

There is a paucity of information on nutrient stocks and distribution in the cocoa ecosystem for the management of production sites to improve its productivity. Apart, sites with long histories of cocoa production could differ in nutrient stocks and distribution relative to recent production regions. Therefore, some existing cocoa farms in Ghana were sampled on the basis of shade management (shaded and unshaded) and production site longevity (Eastern region > Western North region) to determine the nutrient stock and distributions in them. Over 93% of the total ecosystems’ elementary nutrients were stored in the soil. Higher nutrient stocks occurred under shaded cocoa ecosystem. Nutrient element concentrations in cocoa tree biomasses followed the order: N > Ca > K > Mg > P > S > Al = Fe > Zn = Mn, and mostly concentrated in leaf > root = husk > branch > stem. On average, region as a main factor affected nutrient distributions. There was a sharp distinction between macronutrient and micronutrient accumulations in favour of Eastern region and Western North region, respectively. Therefore, the regional distinction with respect to macro- and micronutrients could be used as a guide to fertilizer recommendation for cocoa systems in the two regions.

Seasonal biomass accumulation and nutrient uptake of wheat, barley and oat on a Black Chernozem Soil in Saskatchewan

2006 ◽  
Vol 86 (4) ◽  
pp. 1005-1014 ◽  
Author(s):  
S. S. Malhi ◽  
A. M. Johnston ◽  
J. J. Schoenau ◽  
Z. L. Wang ◽  
C. L. Vera
Keyword(s):  
Nutrient Uptake ◽  
Uptake Rate ◽  
Accumulation Rate ◽  
Biomass Accumulation ◽  
Growing Season ◽  
Early Growth ◽  
Growth Stages ◽  
Nutrient Accumulation ◽  
Maximum Biomass ◽  
Cereal Species

Dry matter and nutrient accumulation in the growing season are the main factors in the determination of seed yield and nutrient use efficiency. Field experiments were conducted with spring wheat (Triticum aestivum L.), barley (Hordeum vulgare L.) and oat (Avena sativa L.) in 1998 and 1999 at Melfort, Saskatchewan, Canada, to determine the biomass accumulation and plant nutrient uptake at different growth stages, and their relationship with days after emergence (DAE) and growing degree days (GDD). All crops generally followed a similar pattern of biomass and nutrient accumulation in the growing season, which increased continuously with growing time, with much faster increase at early growth stages than at late growth stages. Maximum biomass accumulation rate and amount usually occurred at late boot stage (46–47 DAE or 443–460 GDD) and ripening stage (89–90 DAE or 948–1050 GDD), respectively. Maximum rate of nutrient uptake occurred at tillering to stem elongation stages (22–36 DAE or 149–318 GDD). Maximum amount of nutrient uptake generally occurred at the beginning of flowering to medium milk stages (61–75 DAE or 612–831 GDD), except for P in 1998 when it occurred at late milk to ripening stages (80–90 DAE or 922–1050 GDD). In general, the maximum nutrient uptake rate and amount, respectively, occurred earlier than maximum biomass accumulation rate and amount. For various cereal species/cultivars, maximum biomass accumulation rate was 204–232 kg ha-1 d-1, and maximum uptake rate of N, P, K and S, respectively, was 3.2–5.7, 0.30–0.60, 3.85–7.05 and 0.45–0.60 kg ha-1 d-1. The findings suggest that a sufficient supply of nutrients from soil and fertilizers at early growth stages is of great importance for optimum crop yield. Key words: Barley, biomass accumulation, cereals, growth stages, nutrient uptake, oat, wheat

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