scholarly journals Nitrogen fertilization and glyphosate doses as growth regulators in Esmeralda grass

2019 ◽  
Vol 23 (12) ◽  
pp. 930-936 ◽  
Author(s):  
Raíssa P. D. Gazola ◽  
Salatiér Buzetti ◽  
Rodolfo de N. Gazola ◽  
Regina M. M. de Castilho ◽  
Marcelo C. M. Teixeira Filho ◽  
...  
Keyword(s):  
Block Design ◽  
N Fertilization ◽  
N Application ◽  
Foliar N ◽  
Leaf Chlorophyll ◽  
Randomized Block Design ◽  
Matter Production ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Main Factor

ABSTRACT Despite maintaining the green color in turfgrasses, nitrogen (N) fertilization affects shoot growth and, consequently, the frequency of cuts, the main factor in the costs of turfgrass maintenance. Therefore, this study aimed to evaluate N fertilization and the use of glyphosate as a growth regulator in Esmeralda grass (Zoysia japonica Steud.). The experiment was conducted in the field, from August 2014 to July 2015, using a randomized block design in a 5 x 4 factorial scheme with four repetitions and 20 treatments, namely: control (without N), 15 g m-2 of N in soil without foliar N; 30 g m-2 of N in soil without foliar N; 15 g m-2 of N in soil with foliar N (1% urea in 200 L ha-1) and 30 g m-2 of N in soil with foliar N combined with glyphosate doses (0, 200, 400 and 600 g ha-1 active ingredient (a.i.)). The N doses were split into five applications along the year. The following variables were evaluated: height, leaf chlorophyll index and foliar accumulation of nitrogen, phosphorus and potassium. Fertilization with 15 g m-2 of N in soil without foliar N application, split into five times along the year, was adequate for the turfgrass, while foliar fertilization did not promote benefits. The glyphosate dose of 400 g ha-1 a.i. was effective in reducing the growth of Esmeralda grass, without compromising its color and promoted less N, P and K accumulation in the leaves, reducing the height and dry matter production.

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

2017 ◽  
Vol 41 (2) ◽  
pp. 117-127 ◽  
Author(s):  
Thais Ramos da Silva ◽  
Jairo Osvaldo Cazetta ◽  
Samira Domingues Carlin ◽  
Bruna Robiati Telles
Keyword(s):  
Sugar Cane ◽  
Block Design ◽  
Dry Mass ◽  
Plant Transpiration ◽  
Randomized Block Design ◽  
Matter Production ◽  
Prolonged Drought ◽  
Phosphorus And Potassium ◽  
Positive Correlations ◽  
Relationship Of

ABSTRACT Although 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.

scholarly journals Yield performance of upland rice cultivars at different rates and times of nitrogen application

2012 ◽  
Vol 36 (2) ◽  
pp. 475-483 ◽  
Author(s):  
José Hildernando Bezerra Barreto ◽  
Ismail Soares ◽  
José Almeida Pereira ◽  
Antonio Marcos Esmeraldo Bezerra ◽  
José Aridiano Lima de Deus
Keyword(s):  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
N Fertilization ◽  
Rice Cultivars ◽  
Nitrogen Application ◽  
N Application ◽  
Yield Performance ◽  
Randomized Block Design ◽  
N Rates

Nitrogen is the most important nutrient for rice (Oryza sativa L) yields. This study aimed to evaluate the response of upland rice cultivars to N rate and application times in a randomized block design, in subdivided plots with four replications. The studied factors were five rice cultivars (BRS MG Curinga, BRS Monarca, BRS Pepita, BRS Primavera, and BRS Sertaneja), three application times (100 % at planting, 50 % at planting - 50 % at tillering and 100 % at tillering) and four N rates (0, 50, 100, and 150 kg ha-1). All cultivars responded to increased rates and different times of N application, especially BRS Primavera and BRS Sertaneja, which were the most productive when 50 % N rates were applied at sowing and 50 % at tillering. The response of cultivar BRS Monarca to N fertilization was best when 100 % of the fertilizer was applied at tillering.

scholarly journals Carbon and carbon dioxide accumulation by marandu grass under nitrogen fertilization and irrigation

Revista CERES ◽  
2016 ◽  
Vol 63 (3) ◽  
pp. 387-393
Author(s):  
Elisângela Dupas ◽  
Salatiér Buzetti ◽  
Flávio Henrique Silveira Rabêlo ◽  
André Luís Sarto
Keyword(s):  
Carbon Dioxide ◽  
Organic Matter ◽  
Rainy Season ◽  
Block Design ◽  
N Fertilization ◽  
Dry Season ◽  
Organic Matter Production ◽  
Randomized Block Design ◽  
Matter Production ◽  
N Rates

ABSTRACT Nitrogen (N) is the most limiting nutrient for growth of forage grasses, especially in conditions of low water availability. Therefore, it is important to evaluate the effect of N fertilization and irrigation on the accumulation of carbon (C) and carbon dioxide (CO2) by marandu grass in the Cerrado Paulista, in the rainy and dry seasons. Experiments were conducted to evaluate N fertilization in each season, with and without irrigation. Five N rates were used (0, 50, 100, 150 and 200 kg ha-1 per cutting), using urea as N source, totaling 0, 300, 600, 900 and 1200 kg ha-1 in the rainy season and 0, 100, 200, 300 and 400 kg ha-1 in the dry season. The experiments were arranged in a split-plot randomized block design. There was no significant interaction (p > 0.05) between N and time of fertilization in the irrigated experiment. However, N promoted a quadratic effect in organic matter production (OMP), accumulation of C and CO2 by marandu grass, while there was no influence of the seasons. In the non-irrigated experiment, the interaction between N rates and seasons was significant (p < 0.05) only for the rainy season. Organic matter production and C and CO2 accumulation was greater in the rainy season than in the dry season. Irrigation provided increases of approximately 20% in C and CO2 accumulation. The use of N and irrigation increases the accumulation of C and CO2 by marandu grass, and this increase is higher during the rainy season.

scholarly journals Yield and nutrient uptake in niger (Guizotia abyssinica) as influenced by different levels of nitrogen, phosphorus, potassium and sulphur

2021 ◽  
Vol 17 (2) ◽  
pp. 502-508
Author(s):  
P. Bora ◽  
P. C. Bora ◽  
K. Kurmi ◽  
S. Kalita
Keyword(s):  
Seed Yield ◽  
Block Design ◽  
Phosphorus Uptake ◽  
First Year ◽  
Randomized Block Design ◽  
Phosphorus And Potassium ◽  
Major Nutrients ◽  
Nitrogen Phosphorus ◽  
Different Levels ◽  
Sulphur Uptake

A field experiment was conducted during the Rabi seasons of 2016-17 and 2017-18 at Instructional-Cum-Research (ICR) Farm, Assam Agricultural University, Jorhat to study the effect of different levels of primary major nutrients (nitrogen, phosphorus and potassium) as well as secondary nutrient (sulphur) on the uptake of the same by niger and yield of the crop. The experiment was laid out in Factorial Randomized Block Design and replicated thrice. The treatments consisted of three NPK levels viz., F1 (20-10-10 kg N-P2O5-K2O ha-1), F2 (25-12.5-12.5 kg N-P2O5-K2O ha-1), F3 (30-15-15 kg N-P2O5-K2O ha-1) and three sulphur levels viz., S1 (no sulphur), S2 (10 kg S ha-1), S3 (20 kg S ha-1). Application of F3 (30-15-15 kg N-P2O5-K2O ha-1) and S3 (20 kg sulphur ha-1) significantly increased the nitrogen, phosphorus, potassium and sulphur uptake by seed and stover as well as their total uptake by niger as compared to other treatments during both the years of study. Seed yield and protein content (%) of seed of niger were also increased significantly by application of F3 (30-15-15 kg N-P2O5-K2O ha-1) and S3 (20 kg sulphur ha-1) as compared to other treatments during both the years. Interaction effects of NPK (F) and sulphur (S) were found to be significant in respect of seed yield, nitrogen, phosphorus, potassium and sulphur uptake by seed as well as total nitrogen uptake by niger during both the years and phosphorus uptake by niger was found to be significant only in the first year of study.

scholarly journals Dry matter production and chemical composition of Massai grass submitted to nitrogen rates and cutting heights

2016 ◽  
Vol 37 (4Supl1) ◽  
pp. 2487
Author(s):  
Giselle Abadia Campos Pereira ◽  
Leni Rodrigues Lima ◽  
Joelson Antônio Silva ◽  
Rosemay Lais Galati ◽  
Joanis Tilemahos Zervoudakis ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Dry Matter ◽  
Block Design ◽  
N Fertilization ◽  
Linear Increase ◽  
Dry Matter Production ◽  
Randomized Block Design ◽  
Matter Production ◽  
N Rates ◽  
Nitrogen Rates

The study was carried out in a greenhouse with a 4X4 factorial arrangement randomized block design in order to evaluate the effects of nitrogen rates (0, 50, 100 and 150 mg dm-3) associated with cutting heights (10, 15, 20 and 25 cm) on dry matter production and the chemical composition of Massai grass. The seeding was done in pots with 11 kg of soil. 10 plants were kept per pot, and there were two cuts every 35 days. Nitrogen fertilization was split between the two cuts, where the first N application occurred after the uniformity cut and the second after the first cut. In each cut the plants were separated and weighed for botanical component evaluation: leaf blade and stem + sheath. After this, the samples were homogenized and analysed for dry matter (DM), crude protein (CP) and neutral detergent fibre (NDF) content. In the first cut, the N fertilization caused a linear increase in DM production of 0.058 g pot-1 per each 1 mg dm-3 of N applied, as well as causing an increase of 0.549% in CP percentage, a 0.0124 pot-1 g increase in CP production and a reduction of 0.055% in NDF. In the second cut, N rates promoted a quadratic effect on DM production. A maximum DM production of 16.48 g pot-1 with 107.27 mg dm-3 of N was observed while CP production content was increased by 0.0092 g pot-1 for each 1 mg dm-3 N applied. In terms of linear responses to DM and PB, as well as the use efficiency calculated for Massai grass, recommended N doses range between 50 and 100 g dm-3.

scholarly journals Grazing height and nitrogen fertilization strategy in black oat/maize succession

2021 ◽  
Vol 42 (4) ◽  
pp. 2539-2554
Author(s):  
Felipe Luiz Chiamulera Deifeld ◽  
◽  
André Brugnara Soares ◽  
Daniel Schmitt ◽  
Tangriani Simioni Assmann ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Block Design ◽  
Average Daily Gain ◽  
Grazing Intensity ◽  
N Fertilization ◽  
Pasture Management ◽  
Pasture Production ◽  
N Application ◽  
Randomized Block Design ◽  
Grain Crop

This study was developed to examine the effect of combining nitrogen (N) fertilization strategies and pasture management heights on animal and grain production in an Integrated Crop-Livestock System. The experiment was carried out in the municipality of Abelardo Luz - SC, Brazil, between April 2017 and April 2018. A randomized-block design was adopted, with the treatments arranged in a 2×2 factorial arrangement with three replicates. The first factor was the height of the pasture managed under continuous grazing: high (HH, 20 cm) or low (LH, 12 cm). The second factor corresponded to the N application times: in the winter, in the pasture (NP), and in the summer, in the grain crop (NG), in a single N rate of 200 kg ha-1 as topdressing. The forage species used during the pasture phase was black oat (Avena strigosa Schreb), and the pasture was grazed by Nellore × Charolais crossbred steers with an initial body weight of 260 kg. The summer crop was maize (Zea mays). Average daily gain (ADG) and herbage allowance were higher in HH than in LH, whereas animal load was higher in HH. Between the N application times, the animal load was higher in NP. Pasture management height and N fertilization strategy did not affect the variables of number of rows per ear, number of grains per row, thousand-grain weight, or total grain yield, which overall averaged 14,090 kg ha-1. In conclusion, the inversion of nitrogen fertilization between the periods of winter pasture production and grain crop and the management height of the black oat pasture do not compromise the production of maize grains in the summer, or animal production per area. However, steer performance is greater (higher ADG) when the pasture is managed at 20 cm, whereas a high grazing intensity significantly reduces straw on the soil.

scholarly journals Effect of Activator on Levels of C, N, P and K Compost of Salak Sidimpuan Leaf Midrib

2019 ◽  
Vol 6 (3) ◽  
pp. 342-347
Author(s):  
Rizky Amnah ◽  
Meiliana Friska
Keyword(s):  
Total Nitrogen ◽  
Total Phosphorus ◽  
Block Design ◽  
Cow Manure ◽  
Randomized Block Design ◽  
Speed Up ◽  
Phosphorus And Potassium ◽  
Total Potassium ◽  
Nitrogen Phosphorus ◽  
Leaf Midrib

Salak Sidimpuan leaf midrib is abundant pruning waste. Salak Sidimpuan leaf midrib can becomposted containing a number of nutrients (carbon, Nitrogen, phosphorus, and potassium) for plantgrowth. To speed up the process of composting of salak leaf midrib can be done by giving a numberof activators. This study aims to see the effect of activator on the level of elements C, N, P and Kcompost of salak Sidimpuan leaf midribs. This study used a one-factor randomized block design with4 levels of treatment of activator, K0 = control, K1 = chopped midribs+cow manure fertilizer, K2 =chopped midribs+EM4, K3 = chopped midribs+cow manure fertilizer+EM4) with three replications.Data were analyzed with ANOVA and continued with DMRT test at 5% level if the F test showed areal effect. The results showed that the K2 with treatment chopped salak Sidimpuan leaf midrib andEM4 activator tended to give the best results in reducing the levels of C-organic and C/N ratio aswell as increasing total Nitrogen, total phosphorus and total potassium after composting comparedto other activator delivery treatments.

scholarly journals Agronomic efficiency for nitrogen, phosphorus, and potassium in bean cultivars

2020 ◽  
Vol 36 (5) ◽  
Author(s):  
Jéssica Schroder Pacheco ◽  
Cecília Leão Pereira Resende ◽  
Rafael Correia Mendes ◽  
Helton Santos Pereira ◽  
Fabricio Rodrigues
Keyword(s):  
Block Design ◽  
Agronomic Efficiency ◽  
Adequate Dose ◽  
A Value ◽  
Randomized Block Design ◽  
Grain Formation ◽  
Market Niche ◽  
Phosphorus And Potassium ◽  
High Degree ◽  
Nitrogen Phosphorus

The aim of this investigative study was to identify and categorize new bean cultivars regarding their efficiency and responsiveness to nitrogen, phosphorus, and potassium, both individually and simultaneously, as well as to stipulate the cultivars that would suit each niche market based on this classification. Three experiments were conducted in the field separated by nutrients adopting the randomized block design in a factorial scheme (11 x 4) of 11 cultivars in four doses with three replications. Grain yield was the variable investigated and the means were the basis for the classification separated by in four availabilities: low, partial, adequate dose, and nutritional excess. Genetic variability was observed among the bean cultivars for efficiency and responsiveness (agronomic efficiency) to nitrogen, phosphorus, and potassium. The following cultivars: BRS Agreste, BRS Estilo, BRS Notável, and Pérola revealed the greatest values of efficiency and responsive ratings for nitrogen, phosphorus, and potassium, with indications for low and high technological levels. On the contrary, the cultivars BRS Ametista and BRS Sublime based on the efficiency and non-responsive classification showed a low ability to acquire or utilize the nutrients for grain formation. The BRS Pontal cultivar for all three nutrients displayed a high degree of efficiency with a value exceeding the average under different conditions of stress, suggesting that a more rustic cultivar best suits the market niche of small farmers.

scholarly journals Mombaça grass yield as a function of nitrogen fertilization based on the use of the chlorophyll meter

2021 ◽  
Vol 42 (6supl2) ◽  
pp. 4085-4102
Author(s):  
Lorrayne Lays Ferreira Leite ◽  
◽  
Clarice Backes ◽  
Leandro José Grava de Godoy ◽  
Alessandro José Marques Santos ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Block Design ◽  
Management Strategies ◽  
N Fertilization ◽  
Control Treatment ◽  
Agronomic Efficiency ◽  
N Application ◽  
Chlorophyll Meter ◽  
Randomized Block Design ◽  
Tiller Density

The objective of this study was to evaluate the yield and agronomic efficiency of mombaça grass achieved with the management of nitrogen fertilization, based on the nitrogen sufficiency index (NSI) calculated using measurements obtained with a chlorophyll meter. The experiment was conducted in the field, in São Luís de Montes Belos - GO, Brazil, from November 2016 to May 2018, as a randomized-block design with six treatments and five replicates. Treatments consisted of six N fertilization management strategies (M), namely, M1 - reference, with 150 kg ha-1 N per application; M2 - recommended, with 50 kg ha-1 N per application; M3 - 50 kg ha-1 N when NSI < 98%; M4 - 50 kg ha-1 N when NSI < 94%; M5 - 50 kg ha-1 N when NSI < 90%; and M6 - control treatment, without N application. The NSI was monitored based on the relative chlorophyll content obtained with the chlorophyll meter. Forage canopy height, tiller density, and yield were evaluated. At the end of the 2nd cycle, the recommended, reference, NSI98%, NSI94%, and NSI90% treatments had received 1,050, 350, 300, 250, and 0 kg N ha-1. Control treatment obtained the lowest dry biomass yield, whereas the recommended, NSI98%, and NSI94% treatments showed the highest. Thus, N doses between 1,950 and 300 kg ha-1, in the second cycle, provided statistically equivalent yields in mombaça grass. Considering the DM of both evaluation cycles, the highest yield was achieved with the NSI98% and NSI94% treatments. The application of N doses of 250 to 1050 kg ha-1 provided similar yields. Therefore, the adoption of a nitrogen sufficiency index below 98% and 94% as a parameter allows a reduction and rational use of nitrogen fertilizer.

scholarly journals GROWTH AND LEVELS OF N, P AND K IN ROOTSTOCKS OF TAMARIND TREES USING ORGANIC SUBSTRATES AND DOSES OF PHOSPHORUS

2016 ◽  
Vol 29 (2) ◽  
pp. 274-282 ◽  
Author(s):  
EDUARDO CASTRO PEREIRA ◽  
JOSÉ MARIA DA COSTA ◽  
FRANCISCO MICKAEL DE MEDEIROS CÂMARA ◽  
WAGNER CÉSAR DE FARIAS ◽  
VANDER MENDONÇA
Keyword(s):  
Organic Compound ◽  
Dry Matter ◽  
Maximum Dose ◽  
Block Design ◽  
Dry Mass ◽  
Organic Substrates ◽  
Randomized Block Design ◽  
Phosphorus And Potassium ◽  
Goat Manure ◽  
Nitrogen Phosphorus

ABSTRACT: The aim of this study was to evaluate different organic substrates and phosphorus doses on the growth and leaf content of nitrogen, phosphorus and potassium in rootstocks of Tamarindus indica L. The experiment was performed in a greenhouse nursery located on the campus of the Universidade Federal Rural do Semi-Árido (UFERSA), from March to October 2013. The treatments consisted of three organic sources at a concentration of 40% (v/v) (bovine manure, goat manure and a commercial organic compound) and four doses of simple superphosphate (0, 0 kg m-3, 2.5 kg m-3, 5.0 kg m-3 and 7.5 kg m-3). The experiment was conducted in a randomized block design (RBD), with 12 treatments (substrates), four replications and 10 plants per plot, totaling 480 plants. The goat manure and the organic compound were the most suitable treatments for the production of rootstocks of the tamarind tree. The maximum dose of 7.5 g kg-1 of simple superphosphate caused the highest levels of phosphorus and potassium in the dry mass of shoots. The nutrients in the dry matter of shoots accumulated in the following order: N > K > P.

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