scholarly journals DOSE AND MODE OF APPLICATION OF THE WATER-ABSORBENT COPOLYMER ON GROWTH OF BERMUDAGRASS

Irriga ◽  
2018 ◽  
Vol 1 (01) ◽  
pp. 168 ◽  
Author(s):  
Leandro José Grava De Godoy ◽  
Marcos Renato Villaron Xavier e Barbosa ◽  
Marcelo Vieira Ferraz ◽  
Luis Augusto Saes ◽  
Marcos Vieira Ferraz
Keyword(s):  
Dry Matter ◽  
Cynodon Dactylon ◽  
Experimental Period ◽  
Linear Increase ◽  
Soil Medium ◽  
Sandy Substrate ◽  
Randomized Design ◽  
Mode Of Application ◽  
Completely Randomized Design ◽  
Medium Texture

DOSE AND MODE OF APPLICATION OF THE WATER-ABSORBENT COPOLYMER ON GROWTH OF BERMUDAGRASS  LEANDRO JOSÉ GRAVA DE GODOY1; MARCOS RENATO VILLARON XAVIER E BARBOSA2; MARCELO VIEIRA FERRAZ1; LUIS AUGUSTO SAES2 E MARCOS VIEIRA FERRAZ3 1Professor Assistente Doutor do curso de Engenharia Agronômica, Universidade Estadual Paulista, Câmpus Experimental de Registro, Registro, SP, Brasil, [email protected]; [email protected] do curso de Engenharia Agronômica, Universidade Estadual Paulista, Câmpus Experimental de Registro, Registro, SP, Brasil, [email protected]; [email protected]ós-doutorando, Departamento de Horticultura, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Câmpus de Botucatu, SP, Brasil, [email protected].  1 ABSTRACT The present study aimed to evaluate the effects of water-absorbent copolymer in the growth of Bermudagrass, planted in a sandy substrate and soil medium texture. The treatments consisted of five doses of the copolymer (0, 25, 50, 75 or 100 g m-2), and two application modes (dry and hydrated) in a completely randomized design with five replications. During the experimental period turfs were subjected to a period of 10 days without watering. For the sandy substrate, when subjected to water stress, there was linear increase on dry mater production of clippings (growth) in function doses of water-absorbent copolymer. The major dry mater of roots was achieved by application of the copolymer at a dose of 56 g m-2 hydrated. For the soil medium textured copolymer hydrated in doses 50-54 g m-2 water-absorbent copolymer showed greater production of dry mater of clippings of Bermudagrass cv. Celebration applied in powder and hydrated forms respectively. For medium textured soil this water-absorbent copolymer did not influence the intensity of green color, not the green coverage rate of the turfgrass. The application of hydrated copolymer reduced the dry matter of roots in the soil of medium texture. Keywords:  Hydrogel, Cynodon dactylon (L.) Pers, Maintenance, Turfgrass.  GODOY, L. J. G.; XAVIER E BARBOS, M. R. V.; FERRAZ, M. V.; SAES, L. A.; FERRAZ, M. V.DOSES E MODOS DE APLICAÇÃO DE COPOLÍMERO HIDROABSORVENTE NO CRESCIMENTO DA GRAMA BERMUDA  2 RESUMO Com o presente estudo, objetivou-se avaliar os efeitos do copolímero hidroabsorvente no crescimento da grama bermuda, plantada em substrato de areia e solos de textura média. Os tratamentos consistiram da aplicação de cinco doses do copolímero (0; 25; 50; 75; 100 g m-2), e dois modos de aplicação (seco e hidratado), num delineamento inteiramente casualizado com cinco repetições. Durante o período experimental as gramas foram submetidas a um período sem irrigação de 10 dias. Para o substrato arenoso quando submetido a estresse hídrico houve efeito linear do copolímero sobre a produção de fitomassa seca de aparas (crescimento). A maior fitomassa de raízes foi alcançada com a aplicação do copolímero na dose de 56 g m-2 de forma hidratada. Já para o solo de textura média o copolímero na forma hidratada nas doses de 50 a 54 g m-2 do copolímero proporcionou maior produção de fitomassa seca de aparas da grama bermuda cv. Celebration aplicados em pó e de forma hidratada, respectivamente. Para o solo de textura média este copolímero não influenciou a intensidade de cor verde, nem a taxa de cobertura verde do gramado. A aplicação do copolímero hidratado reduziu a fitomassa seca das raízes, em solo de textura média. Palavras-Chave: Hidrogel, Cynodon dactylon (L.) Pers, Manutenção, Gramado. 

scholarly journals Nutrients exportation by Tifdwarf bermudagrass from golf course greens

2020 ◽  
Vol 26 (3) ◽  
pp. 422-431 ◽  
Author(s):  
Caroline de Moura D’Andréa Mateus ◽  
Regina Maria Monteiro de Castilho ◽  
Patrick Luan Ferreira dos Santos ◽  
Flávia Diniz Mota ◽  
Leandro José Grava de Godoy ◽  
...  
Keyword(s):  
Dry Matter ◽  
Cynodon Dactylon ◽  
Golf Course ◽  
Golf Courses ◽  
Fertilization Program ◽  
Paulo State ◽  
Randomized Design ◽  
Management Techniques ◽  
Completely Randomized Design ◽  
One Year

Abstract One of the management techniques used in greens (final areas of the holes) of golf course is the fertilizer. To correct fertilization program of these areas should know the consumption of nutrients throughout the plant cycle. The objective was to determine the export of nutrients by clipping of Tifdwarf bermudagrass (Cynodon dactylon (L.) Pers. x Cynodon transvaalensis Burtt-Davey) used in golf courses greens in the four weather seasons, as information to improve nutritional management. The research project was conducted in two golf courses in Sao Paulo State. Four greens were studied in each field, for a period of one year, using a 4x2 factorial (weather seasons x golf courses) in a completely randomized design. The production of dry matter and nutrient concentration were evaluated, and the absorption and exportation of nutrients by leaf clippings was subsequently calculated. The amount of nutrients exported by turfgrass clippings was different between the two golf courses. The summer was the season of greatest accumulation and export of nutrients in FG, except for Fe. Autumn was the season of greatest accumulation and export of nutrients in FCA, except for Mn and Zn. Considering the amount of nutrients exported by the greens clippings of the Tifdwarf bermudagrass from the two golf courses studied, the macronutrients were exported in the following order: N>K>Ca>P>S>Mg (21.8, 4.3, 2.0, 1.9, 1.8, 0.7 g m-2) and the micronutrients were exported in the following order: Fe>Zn>Mn>Cu>B (257.8, 27.4, 23.6, 7.8, 6.0 mg m-2).

scholarly journals Initial Development of Eucalyptus According to Different Desiccation Periods of Signalgrass

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
Y. GRAAT ◽  
A.L. BACHA ◽  
M.P. NEPOMUCENO ◽  
P.L.C.A. ALVES
Keyword(s):  
Dry Matter ◽  
Control Sample ◽  
Experimental Period ◽  
Initial Development ◽  
Randomized Design ◽  
Urochloa Decumbens ◽  
Completely Randomized Design ◽  
Red Latosol ◽  
Eucalyptus Urograndis ◽  
Herbicide Glyphosate

ABSTRACT: This study aimed at evaluating the effects of different desiccation periods of Urochloa decumbens on the initial development of Eucalyptus urograndis (clone C-219H). The experiment was conducted in 100 liter concrete boxes, previously filled with Dark-Red Latosol. U. decumbens was sown in all plots, except for the control sample without covering. After 95 days from sowing, the herbicide glyphosate (dose of 1,424 g a.e. ha-1) was sprayed at intervals of 0 (Apply-Plant), 7, 14, 21, 28 and 35 days before eucalyptus planting, plus a control sample without covering, totaling seven treatments. A completely randomized design with six replications was used. Eucalyptus plants were evaluated 30, 60 and 90 days after planting (DAP), when the height of the plants and the diameter of the stem were determined. At the end of the experimental period (90 DAP), the leaf area and the dry matter of leaves and stem were measured. It is possible to conclude that the Apply-Plant modality was harmful to some of the eucalyptus characteristics (E. urograndis - C-219H), while planting the seedlings in periods over 14 days after the desiccation of U. decumbens plants promoted a better development of the culture.

scholarly journals Yellow grease in sheep diets: intake and digestibility

2021 ◽  
Vol 73 (3) ◽  
pp. 684-692
Author(s):  
A.C. Rêgo ◽  
C.S.B. Oliveira ◽  
L.E.F. Afonso ◽  
J.C. Azevedo ◽  
O.R. Machado Neto ◽  
...  
Keyword(s):  
Nitrogen Balance ◽  
Nutrient Intake ◽  
Crude Protein ◽  
Dry Matter ◽  
Dietary Supplementation ◽  
Experimental Period ◽  
Neutral Detergent Fiber ◽  
Yellow Grease ◽  
Randomized Design ◽  
Completely Randomized Design

ABSTRACT This study aimed to assess the effects of yellow grease supplementation on the intake, digestibility, and nitrogen balance in sheep. Twenty Santa Inês lambs with a mean age of 95 ± 10 d and body weight of 19.29 ± 3.17kg were evaluated in a completely randomized design. The diets were supplemented with oil at concentrations of 0, 20, 40, 60, and 80 gkg-1 of dry matter (DM) of the concentrate. The diets were based on roughage and concentrate (50:50). The experimental period lasted 19 d and included 14 adaptation days and five collection days for the total supplied diet, orts, feces, and urine. Supplementation with yellow grease had no significant effect on the intake of DM, crude protein (CP), neutral detergent fiber (NDF), or non-fiber carbohydrates (NFC). However, the ether extract (EE) intake increased linearly with supplementation of yellow grease. Moreover, no effect was observed for DM, CP, NDF, and NFC digestibility and nitrogen balance. EE digestibility increased linearly with the yellow grease dietary supplementation. Thus, sheep dietary supplementation with yellow grease may be used at a level of up to 80 gkg-1 of DM of concentrate without impairing nutrient intake and digestibility.

scholarly journals Ingestive Behavior of Ovine Fed with Marandu Grass Silage Added with Naturally Dehydrated Brewery Residue

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Daniele de Jesus Ferreira ◽  
Anderson de Moura Zanine ◽  
Rogério de Paula Lana ◽  
Alexandre Lima de Souza ◽  
Marinaldo Divino Ribeiro ◽  
...  
Keyword(s):  
Dry Matter ◽  
Experimental Period ◽  
Ingestive Behavior ◽  
Maximum Point ◽  
Quadratic Effect ◽  
Grass Silage ◽  
Maximum Value ◽  
Linear Behavior ◽  
Randomized Design ◽  
Completely Randomized Design

The objective was to evaluate the ingestive behavior of ovine fed Marandu grass silage with dehydrated brewery residue added. The experiment had a completely randomized design with five treatments and four repetitions, with the treatments levels of inclusion being of 0, 10, 20, 30, and 40% natural matter of naturally dehydrated brewery residue for 36 hours to the marandu grass silage. 20 ovines were used and the experimental period was 21 days, 15 being for adaptation to diets. The use of brewery byproduct promoted quadratic effect (P<0.05) for the consumption of dry matter with maximum point value estimated at adding 23.25% additive. Ingestion efficiency and rumination efficiency of dry matter (g DM/hour) were significant (P<0.05), by quadratic behavior, and NDF ingestion and rumination efficiency showed crescent linear behavior. The DM and NDF consumption expressed in kg/meal and in minutes/kg were also significant (P<0.05), showing quadratic behavior. Rumination activity expressed in g DM and NDF/piece was influenced (P<0.05) by the adding of brewery residue in marandu grass silage in quadratic way, with maximum value estimated of 1.57 g DM/bolus chewed in inclusion of 24.72% additive in grass silage. The conclusion is that intermediary levels adding of 20 to 25% dehydrated brewery residue affects certain parameters of ingestive behavior.

scholarly journals Nutritional value of pre-dried banana tree pseudostem ammoniated with protected urea

2020 ◽  
Vol 41 (4) ◽  
pp. 1345
Author(s):  
João Paulo Sampaio Rigueira ◽  
Nathália Gonçalves de Jesus ◽  
Eleuza Clarete Junqueira de Sales ◽  
Vicente Ribeiro Rocha Júnior ◽  
Alexandre Soares dos Santos ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Crude Protein ◽  
Dry Matter ◽  
Linear Increase ◽  
Neutral Detergent Fiber ◽  
Control Group ◽  
Banana Tree ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Different Doses

The objective of this study was to evaluate the chemical composition, pH and rumen degradability of banana tree pseudostems pre-dried and ammoniated with different doses of urea (0, 0.5, 1.0, 1.5 and 2.0% in natural matter). The experiment consisted of five treatments (doses of urea) with six replications, following a completely randomized design. There was a linear increase in the pH (P < 0.01) of the banana tree pseudostems pre dried with the inclusion of urea. There was no difference (P > 0.05) in dry matter, ash, neutral detergent fiber, acid detergent fiber, lignin, non-fibrous carbohydrates and total digestible nutrients; the averages were 31.58, 18.82, 46.43, 9.30, 11.87 and 42.52%, respectively. The inclusion of 2% urea increased the crude protein content (P < 0.01) by 42.75%, the soluble fraction "a" by 31.82%, and the potential and effective degradability of dry matter by 15.49% compared to that of the control group (without urea). The potentially degradable fraction, time of colonization and ruminal repletion of the neutral detergent fiber of the pre-dried banana tree pseudostems were not altered with the inclusion of urea (P > 0.05). The ammonization of the pre-dried banana tree pseudostems with 2% of urea improved the chemical composition and rumen degradability of the dry matter.

Haematological and serum biochemical indices of growing rabbits fed graded levels of Yam peel meal as replacement for maize

2020 ◽  
Vol 47 (4) ◽  
pp. 167-175
Author(s):  
I. B. Amaza ◽  
A. Maidala ◽  
C. E. Isidahomen
Keyword(s):  
Biochemical Analysis ◽  
Experimental Period ◽  
Blood Chemistry ◽  
Feeding Trial ◽  
Randomized Design ◽  
Serum Biochemical ◽  
Inclusion Level ◽  
Completely Randomized Design ◽  
Biochemical Indices ◽  
Dietary Treatments

Haematological and serum biochemical parameters are indicators of physiological, nutritional and pathological status of animals. Investigation of these parameters provide information for diagnostic purposes. The study was conducted to determine the influence of feeding graded levels of yam peel meal (YPM) as a replacement for maize on haematology; blood chemistry was evaluated in rabbits. Thirty- six (New Zealand white X Chinchilla) were randomly assigned to four dietary treatments in a completely randomized design with nine rabbits per treatment. The rabbits were fed diets containing 0, 12.5, 25 and 37.5% of Yam peel meal (YPM) as a replacement for maize, designated as T1, T2, T3 and T4, respectively. The experimental diets and clean drinking water were supplied ad libitum throughout the experimental period of nine weeks. At the end of the feeding trial, three rabbits per treatment were randomly selected for hematological and serum biochemical analysis. All the haematological and serum biochemical indices except AST were affected (P<0.05) by dietary inclusion of YPM. Although most of the parameters investigated were affected by rabbits fed test ingredient, the values fell within the normal literature reference values for rabbits. It can therefore be concluded that up to 37.5% inclusion level of YPM can be fed to growing rabbits without deleterious effects on health status.

scholarly journals MORPHOPHYSIOLOGICAL RESPONSES OF COWPEA GENOTYPES TO IRRIGATION WATER SALINITY

2017 ◽  
Vol 30 (4) ◽  
pp. 1001-1008
Author(s):  
JOÃO PEDRO ALVES DE AQUINO ◽  
ANTÔNIO AÉCIO DE CARVALHO BEZERRA ◽  
FRANCISCO DE ALCÂNTARA NETO ◽  
CARLOS JOSÉ GONCALVES DE SOUZA LIMA ◽  
RAYLSON RODRIGUES DE SOUSA
Keyword(s):  
Irrigation Water ◽  
Dry Matter ◽  
Arid Regions ◽  
Stem Diameter ◽  
Water Salinity ◽  
Productive Capacity ◽  
Randomized Design ◽  
Irrigation Water Salinity ◽  
Water Salt ◽  
Completely Randomized Design

ABSTRACT Cowpea is broadly cultivated worldwide, especially in semi-arid or arid regions where soil or irrigation water salt contents can negatively influence the species’ productive capacity. The objective of this study was to evaluate the morphophysiological responses of cowpea genotypes to irrigation water salinity. The experiment was conducted in a greenhouse, under a completely randomized design with nine replications and in a 5x3 factorial scheme. Treatments consisted of five levels of irrigation water electrical conductivity - EC (EC0: 0.55; EC1: 1.60; EC2: 3.20; EC3: 4.80 and EC4: 6.40 dS m-1), applied from the 15th day after sowing (DAS), and three cowpea genotypes (G1: BRS Imponente; G2: MNC04-795F-168 and G3: MNC04-795F-159). EC increases at 35 DAS promoted stem diameter reductions of 8.0% (G1), 11.4% (G2), and 7.7% (G3), indicating different resistance to salinity by each genotype. Leaf area reductions at 25 and 38 DAS were 30.9% and 38.8% for EC0 and EC4, respectively. The BRS Imponente cultivar presented a performance superior to those of G2 and G3 in relation to stem diameter and stem dry matter at 25 DAS, and root-shoot and root-leaf ratios at 38 DAS.

scholarly journals Competitive analysis of soybean and sudangrass using replacement series design

Revista CERES ◽  
2016 ◽  
Vol 63 (5) ◽  
pp. 668-675
Author(s):  
Mauro Antônio Rizzardi ◽  
Alana Cristina Dorneles Wandscheer ◽  
Andrea Ferreira Hoffmann
Keyword(s):  
Competitive Analysis ◽  
Dry Matter ◽  
Rio Grande ◽  
Agricultural Crops ◽  
Rio Grande Do Sul ◽  
Replacement Series ◽  
Series Design ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Agricultural Areas

ABSTRACT Competition is the best known form of direct interference of weeds on agricultural crops. However, there is relatively little information on the competition of the weed sudangrass on soybean, which has been common in agricultural areas in the southern of Rio Grande do Sul. The objective of this study was to evaluate the competition between sudangrass and soybeans using replacement series experiments. The experiment was carried out in a greenhouse in a completely randomized design with four replications. The treatments consisted of soybean and sudangrass associations. The experimental units were 8-L plastic pots, in the proportions 0: 8, 2: 6, 4: 4, 6: 2, 8: 0, corresponding to 0, 25, 50, 75 and 100% of the crop and weed respectively. Shoot, root and total dry matter and plant height were analyzed through diagrams applied to replacement series and competitive indices. Soybean showed competitive superiority in coexistence with sudangrass in relation to shoot, root and total dry matter. The intraspecific competition was more significant for the crop and inter-specific competition was more important for the weed.

scholarly journals Tolerance of Annual Winter Species to Protoporfirinogen Oxidase Inhibiting Herbicides (Protox)

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
C. ALVES ◽  
L. GALON ◽  
R.R. KAIZER ◽  
F.L. WINTER ◽  
C.M. HOLZ ◽  
...  
Keyword(s):  
Leaf Area ◽  
Plant Species ◽  
Analysis Of Variance ◽  
Dry Matter ◽  
Stem Diameter ◽  
F Test ◽  
Tolerant Species ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Linear Regressions

ABSTRACT: The use of plant species for the phytoremediation of soils contaminated with herbicides is an alternative that has been emphasized to minimize the effects of the persistence of agrochemicals in the environment. The objective of this study was to evaluate the tolerance potential of winter species in soils contaminated with sulfentrazone and fomesafen. The experiment was in a completely randomized design with four replications. Doses of fomesafen (0.0, 0.125, 0.250, and 0.5 kg ha-1) and sulfentrazone (0.0, 0.3, 0.6 and 1.2 kg ha-1) were applied during the pre-emergence of phytoremediate species (black oat, vetch, birdsfood trefoil, radish and lupin). Forty five days after the emergence of the species, the phytotoxicity (%), leaf area (cm2), stalk and/or stem diameter (mm), height (cm) and dry matter (g) variables of the plants were evaluated. Data were submitted to analysis of variance by F test; when significant, linear or non linear regressions were applied to evaluate the effect of herbicide doses on the studied species. Birdsfood trefoil was the less tolerant species to fomesafen and sulfentrazone. Black oat was less affected by the application of fomesafen doses, but it was highly susceptible to sulfentrazone. Radish presented tolerance only up to the fomesafen dose of 0.25 kg ha-1; as for sulfentrazone, the species showed tolerance. The most tolerant species to fomesafen and sulfentrazone, regardless of the dose, was the lupine, which is a possible alternative for the phytoremediation of soils contaminated with these herbicides.

scholarly journals Size and vigor of Anadenanthera colubrina (Vell.) Brenan seeds harvested in Caatinga areas

2017 ◽  
Vol 39 (4) ◽  
pp. 363-373 ◽  
Author(s):  
Jaciara de Souza Bispo ◽  
Danielle Carolina Campos da Costa ◽  
Samara Elizabeth Vieira Gomes ◽  
Gilmara Moreira de Oliveira ◽  
Janete Rodrigues Matias ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Dry Matter ◽  
Folk Medicine ◽  
Germination Percentage ◽  
Climate Variations ◽  
Randomized Design ◽  
Mother Plants ◽  
Physiological Quality ◽  
Completely Randomized Design

Abstract: Angico is a species found in several environments in Brazil, with several applications. It is used in the timber industry and mainly in folk medicine. In order to verify a variation in the biometric characteristics and the quality of seeds from different mother-plants in different harvesting years, the following variables were studied: moisture content, diameter, density, electrical conductivity, fresh and dry matter of seedlings, germination percentage and kinetics, in a completely randomized design with a 2x3 factorial arrangement (lots x size). The obtained results showed that angico seeds from different lots showed different physiological quality, possibly due to the climate variations to which mother-plants were submitted in the different years. Seed size directly interferes with seedling growth under both controlled and greenhouse conditions, and it can be used as a vigor indicator for angico seeds.

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