Desenvolvimento do capim vetiver cultivado em diferentes ambientes e adubado com esterco bovino

<p>The objective of this work was to evaluate the development of vetiver grass (Chrysopogon zizanioides L. Roberty) cultivated in PVC columns and fertilized with bovine manure levels under different ambient conditions. The experiment was installed in a completely randomized design, with three replications, in a factorial scheme 5 x 2 being five levels of bovine manure (0%, 10%, 20%, 30% and 40%) and two types of environments (free and protected environment with 80% opening shade), totalizing 30 experimental units. Evaluations were carried out regarding plant height and number of shoots to 15, 30, 45 and 60 days after transplanting (DAT). At 60 DAT at the end of the experiment, the plants were separated to determine the root length and the production of green and dry mass of the aerial part and the root. The results obtained showed that the absence of bovine manure contributed to the greater development of the root system of vetiver grass plants. The 10% level of bovine manure provided a greater number of sprouts and increase in the green mass of the aerial part and green dry mass of the root. The free environment provided the greatest development of vetiver grass plants.</p>

Download Full-text

Ruellia simplex cuttings propagation produced on carnauba waste substrate

Revista Agro mbiente On-line ◽

10.18227/1982-8470ragro.v14i0.6185 ◽

2020 ◽

Vol 14 ◽

Author(s):

Taciella Fernandes Silva ◽

Klayton Antonio Do Lago Lopes ◽

Janaiane Ferreira Dos Santos ◽

Ana Paula De Almeida Sousa ◽

Francisca Gislene Albano-Machado ◽

...

Keyword(s):

Root System ◽

Aerial Part ◽

Ornamental Plants ◽

Dry Mass ◽

Fresh Mass ◽

Randomized Design ◽

Shoot Number ◽

Significant Difference ◽

Number Of Leaves ◽

Completely Randomized Design

The production of quality seedlings is necessary for the trading of ornamental plants. Seedling quality depends on several factors, among these factors, the substrate is highlighted. Thus, this study aimed to evaluate the effect of substrates based on bagana of carnauba, in the production of Ruellia simplex seedlings, by vegetative propagation. A completely randomized design was adopted, with six treatments and four replications. The treatments (substrates) were composed of bagana of carnauba (BC) and soil, in the following proportions: BC0 - 0% BC + 100% of soil; BC20 - 20% BC + 80% of soil; BC40 - 40% BC + 60% of soil; BC60 - 60% BC + 40% of soil; BC80 - 80% BC + 20% of soil; BC100 - 100% BC + 0% of soil. The plot consisted of a plant. After 45 days of cutting, it was evaluated: number of shoots; number of leaves per shoot; diameter of the highest shoot; length of the highest shoot; root length; inflorescence number; number of flowers per inflorescence; leaf area; root volume; aerial part fresh mass; root system fresh mass; aerial part dry mass; and root system dry mass. There was a significant difference for the variables, number of leaves per shoot, diameter and length of the highest shoot, number of flowers per inflorescence, fresh and dry mass of the aerial part. Having a direct relationship between the increase in the proportion of bagana of carnauba volume and the inflorescence number, the substrate 100% of bagana of carnauba is indicated.

Download Full-text

GROWTH RESPONSE OF BEHA GRASS (Brachiaria humidicola) FERTILIZED WITH GOAT MANURE

Indonesian Journal Of Animal Agricultural Science (IJAAS) ◽

10.33772/ijaas.v2i3.14080 ◽

2021 ◽

Vol 2 (3) ◽

Author(s):

Budiman Budiman ◽

Natsir Sandiah ◽

La Malesi

Keyword(s):

Plant Height ◽

Root Length ◽

New Production ◽

Brachiaria Humidicola ◽

Randomized Design ◽

Length Data ◽

Number Of Leaves ◽

Completely Randomized Design ◽

Goat Manure ◽

Difference Test

This study aimed to determine the best dosage of goat manure as a natural fertilizer on Beha grass(Brachiaria humidicola). This study used 64 poles of Beha grass grown in polybags divided into 16plots, and it used a completely randomized design (CRD) to analyze the data. This study consist of 4treatments that is P0 (0 ton/ha of goat manure), P1 (10 ton/ha of goat manure), P2 (15 ton/ha of goatmanure), and P3 (20 ton/ha of goat manure). This study's variables were plant height, number of leaves,numbers of tillers, new production, and root length. Data analysis used ANOVA variance continued withreal honest difference test. The result of this study showed that averages of plant height (cm) wereP0=26, P1=50.5, P2=51.5, and P3=52.75. Averages of the number of leaves were P0=22, P1=110,P2=160, and P3=185. Averages of numbers of tillers were P0=7, P1=25, P2=37, and P3=38. Averages ofnew production (g) were P0=17.75, P1=123.5, P2=178, and P3=192.25. Averages of root length (cm)were P0=37.8, P1=39.5, P2=41.775, and P3=49.5. Fertilization with natural fertilizer from goat manurehas a genuine effect (P<0.01) on the growth of Beha grass. The best dosage of fertilization with goatmanure was 15 ton/ha.

Download Full-text

EMISSÃO DE ÓXIDO NITROSO ASSOCIADO AO USO DE UREIA NO CULTIVO DE MELÃO AMARELO

Nativa ◽

10.31413/nativa.v6i6.5459 ◽

2018 ◽

Vol 6 (6) ◽

pp. 600

Author(s):

Vanessa Cláudia Vasconcelos Segundo ◽

Renato Innecco ◽

Ebenézer De Oliveira Silva

Keyword(s):

Leaf Area ◽

Aerial Part ◽

Dry Mass ◽

Nitrogen Fertilizers ◽

Root Part ◽

Randomized Design ◽

Number Of Leaves ◽

Completely Randomized Design ◽

Brazilian Northeast ◽

Total Soil Nitrogen

O meloeiro tem grande importância econômica para o Nordeste brasileiro. Entretanto, em seu cultivo utiliza-se insumos que podem prejudicar o ambiente; como, os fertilizantes nitrogenados. Objetivou-se avaliar a emissão de N2O em cultivo de meloeiro amarelo ‘Goldex’. O experimento foi instalado em delineamento inteiramente casualizado, com cinco repetições. Os tratamentos foram: 0 (controle), 1,0; 1,5 e 2 vezes a quantidade de nitrogênio recomendada para cada estádio. Foi analisado o fluxo de N2O, área foliar, número de folhas, massa seca da parte aérea, massa seca dos frutos, massa seca da parte radicular, nitrogênio total do solo, das plantas e N (NH4+ e NO3-) do solo. O fluxo de N2O teve comportamento temporal irregular durante a fase de plântulas e crescente na floração. Os tratamentos afetaram significativamente a área foliar, número de folhas, massa seca da parte aérea, massa seca da parte radicular, nitrogênio da parte aérea e parte radicular das plantas e do solo. A aplicação de nitrogênio, em dosagens superiores à recomendada, não aumentou a produção do meloeiro. E o cálculo do fator de emissão mostrou que a emissão do N2O não atingiu valores prejudiciais ao ambiente.Palavras-chave: fator de emissão, efeito estufa e nitrogênio. NITROUS OXIDE EMISSION ASSOCIATED WITH UREA USE THE YELLOW MELON CROP ABSTRACT: The melon has great economic importance for the Brazilian Northeast. However, in its cultivation uses inputs that can harm the environment; Such as nitrogen fertilizers. The objective of this study was to evaluate the emission of N2O in yellow 'Goldex' cultivar. The experiment was installed in a completely randomized design with five replications. The treatments were: 0 (control), 1.0; 1.5 and 2 times the amount of nitrogen recommended for each stage. N2O flux, leaf area, leaf number, shoot dry mass, fruit dry mass, dry mass of the root portion, total soil nitrogen, of the plants and N (NH4 + and NO3 -) of the soil were analyzed. The flow of N2O had irregular temporal behavior during the seedling phase and increased in flowering. The treatments affected significantly the leaf area, number of leaves, dry mass of the aerial part, dry mass of the root part, nitrogen of the aerial part and root part of the plants and the soil. The application of nitrogen, in dosages higher than the recommended one, did not increase the production of the melon. And the calculation of the emission factor showed that the emission of N2O did not reach values harmful to the environment.Keywords: emission fator, greenhouse and nitrogen.

Download Full-text

High dilution preparations for organic production system of broccoli

Agronomía Colombiana ◽

10.15446/agron.colomb.v35n1.58586 ◽

2017 ◽

Vol 35 (1) ◽

pp. 53-58 ◽

Cited By ~ 1

Author(s):

Edwin Pulido ◽

Pedro Boff ◽

Tatiana Duarte ◽

Mari Inês Boff

Keyword(s):

Plant Height ◽

Root Length ◽

Field Experiments ◽

Dry Mass ◽

Organic Production ◽

Stem Diameter ◽

High Dilution ◽

Organic System ◽

Randomized Design ◽

Fresh And Dry Mass

The aim of this study was to evaluate the influence of high dilution preparations on seedlings growth and production of broccoli under organic system. Three experiments were conducted in a greenhouse with completely randomized design. Two others experiments were conducted under field conditions, and the experimental design was randomized in blocks. Both designs were done with four replications and nine treatments. The treatments consisted of high dilution preparations of Arnica montana, Silicea terra, Carbo vegetabilis and Sulphur at 6CH or 30CH, water was used as control. In greenhouse, plant height, root length and stem diameter of seedlings were evaluated, along with the fresh and dry mass of shoot and root. In field, fresh and dry mass of inflorescences, plant heigh and stem diameter were evaluated. Silicea terra at 30CH increased the stem diameter, root length and dry mass of shoot and root in the broccoli seedlings. Sulphur at 6CH increased the fresh and dry mass of broccoli inflorescences. Silicea terra at 6CH, Carbo vegetabilis, and Sulphur at 30CH increased the plant height in field experiments. This suggests that high dilution preparations can be utilized to increase the biomass production and others desirable characteristics of broccoli crop under organic system.

Download Full-text

Biochar as an alternative substrate for the production of sugarcane seedlings

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v25n12p826-832 ◽

2021 ◽

Vol 25 (12) ◽

pp. 826-832

Author(s):

Mauro F. C. Mota ◽

Eulina F. Damião ◽

Matheus R. Torres ◽

Rodinei F. Pegoraro ◽

Leidivan A. Frazão ◽

...

Keyword(s):

Particle Size ◽

Plant Height ◽

Dry Mass ◽

Leaf Length ◽

Particle Sizes ◽

Alternative Substrate ◽

Aerial Parts ◽

Randomized Design ◽

Completely Randomized Design ◽

Important Form

ABSTRACT Biochar, which has emerged as an important form of the transformation and final disposal of biomass, can be used directly in soil or in seedling nurseries. In this study, the use of biochar of different particle sizes and percentages was evaluated in replacement to a conventional substrate used in the production of sugarcane seedlings. To this end, an experiment was carried out based on a completely randomized design, with a 5 × 4 factorial scheme, consisting of five different percentages of biochar (with 0, 25, 50, 75, and 100% v/v substitution of the conventional substrate) and four particle sizes (<1, 2, 4, and 9 mm), with nine repetitions. As seedling growth variables, the average sprouting time, sprouting speed index, plant height, leaf number, leaf length, and width + 2, as well as the dry mass of the aerial parts and roots were evaluated. Irrespective of the percentage of commercial substrate replaced with biochar, sprouting time was found to be shorter when 6-mm-diameter biochar particles were used. With respect to the sprouting speed index, it was found that regardless of particle size, the highest value occurred when biochar was used to replace 42% of the commercial substrate. The substitution of the commercial substrate with biochar had the effect of reducing the growth of sugarcane seedlings.

Download Full-text

Crescimento e produção de alface em resposta a níveis de drilocomposto e NPK

Colloquium Agrariae ◽

10.5747/ca.2020.v16.n3.a368 ◽

2020 ◽

Vol 16 (3) ◽

pp. 18-26

Author(s):

Angelita Aparecida Coutinho Picazevicz ◽

Arnaldo Libório Santos Filho ◽

Leonardo dos Santos França Shockness ◽

Luana Silva Lima ◽

Karoliny Fim da Silva ◽

...

Keyword(s):

Aerial Part ◽

Dry Matter ◽

Dry Mass ◽

Root Mass ◽

Randomized Design ◽

Completely Randomized Design ◽

Npk Fertilization

The objective was to evaluate the effects of levels of compost and fertilization with NPK on growth and production of lettuce. The experiment was carried out in a greenhouse, in a completely randomized design in a 6 x 2 factorial scheme, with four replications, considering six levels of compost (0; 25; 50; 75; 100 and 125 g plant-1) and absence and presence fertilization with NPK. The evaluated parameters were number of total and commercial leaves, mass of fresh commercial and total aerial part, mass of commercial and total dry aerial part, dry root mass and total dry mass. There was an interaction between the drilocomposite and NPK fertilization for the evaluated parameters, except for root dry matter. The fertilization with NPK increased the growth and production of lettuce when there was no application of the compost. Likewise, that the levels of this fertilizer increased the growth and production of lettuce only in the absence of NPK. The application of drilocomposite increases the growth of lettuce plants and can replace fertilization with NPK.

Download Full-text

MANAGEMENT OF VOLUNTEER CASTOR BEAN IN THE GLYPHOSATE-RESISTANT SOYBEAN CROP

Planta Daninha ◽

10.1590/s0100-83582016340300015 ◽

2016 ◽

Vol 34 (3) ◽

pp. 545-553 ◽

Cited By ~ 2

Author(s):

V.S. ROCHA ◽

A.G.F. COSTA ◽

D.M.B.M. TROVÃO ◽

J.H. ZONTA ◽

V. SOFIATTI ◽

...

Keyword(s):

Leaf Area ◽

Plant Height ◽

Castor Bean ◽

Dry Mass ◽

Stem Diameter ◽

Root Volume ◽

Soybean Crop ◽

Randomized Design ◽

Chlorimuron Ethyl ◽

Completely Randomized Design

ABSTRACT The goal of this study was to evaluate the management of volunteer castor bean with herbicide applications used in pre and post-seeding of soybean crop resistant to glyphosate. Two experiments were conducted in a greenhouse in a completely randomized design with three replications. The first experiment corresponded to applications of desiccation with treatments: glyphosate (1,080 g ha-1); glyphosate + 2,4-D (1,080 + 670 g ha-1); glyphosate + carfentrazone-ethtyl (1,080 + 20 g ha-1); glyphosate + flumioxazin (1,080 + 25 g ha-1); glyphosate + saflufenacil (1,080 + 35 g ha-1); glyphosate + chlorimuron-ethyl (1,080 + 12.5 g ha-1); diuron + paraquat (300 + 600 g ha-1); and the control without application. In the second experiment, the treatments corresponded to doses of 0, 90, 180, 360, 720, 1,440, 2,880 and 5,760 g ha-1 of glyphosate for applications in post-emergence in soybean RR. The applications took place when the castor bean plant had four to six true leaves. The evaluations done in both experiments were: control and plant height at 7, 14 and 21 days after application (DAA); and stem diameter, leaf area, root volume, dry mass of shoots and roots at 21 DAA. The treatments with diuron + paraquat and glyphosate associated with 2,4-D, carfentrazoneethyl, flumioxazin or saflufenacil are more efficient for castor bean control in desiccation in pre-seeding of soybean. Glyphosate doses from 720 g ha-1 are effective to control castor bean in post-emergence of the glyphosate-resistant soybean crop.

Download Full-text

Initial Growth of Amburana cearensis in Decomposed Buriti Stem Substrate and Nitrogen Doses

Journal of Agricultural Science ◽

10.5539/jas.v10n7p497 ◽

2018 ◽

Vol 10 (7) ◽

pp. 497

Author(s):

Augusto Matias de Oliveira ◽

Wéverson Lima Fonseca ◽

Tiago De Oliveira Sousa ◽

Hingrid Raiany Santos Teixeira ◽

Fernandes Antonio de Almeida ◽

...

Keyword(s):

Native Species ◽

Significant Interaction ◽

Aerial Part ◽

Slow Growth ◽

Dry Mass ◽

Initial Growth ◽

Initial Development ◽

Randomized Design ◽

Completely Randomized Design

One of the difficulties of producing native species seedlings is slow growth. The objective of this study was to evaluate the initial development of Amburana cearensis (Allem.) A. C. Smith in relation to the concentration decomposed buriti stem substratum and nitrogen doses. A completely randomized design was used in a factorial arrangement of 3 × 5 (proportions of decomposed buriti stem × nitrogen doses), with six replicates. The treatments were formulated substrates comprised of decomposed buriti stem manually mixed with soil (Dystrophic Yellow Latosol) in three proportions (0, 25 and 50%) and five nitrogen doses (0, 100, 200, 300 and 400 mg dm-3) applied in treatments. There was no significant interaction between the DRM and ND factors. However, there was an isolated effect for the following variables: Plant height (PH), stem diameter (SD), leaf number (LN), leaf area (LA), dry mass of the aerial part (DMA) and root length (RL). The best concentrations of the substrate for the variables PH, LA and DMA were 25% and 50%, whereas for SD, LN and RL, the best result was 50%. ND and other variables had good responses under recommended doses ranging from a minimum of 264.82 mg dm-3, observed in DMA, and a maximum of 400 mg dm-3, observed in RL. Both factors positively the quality of umburana seedlings.

Download Full-text

Perbandingan Tingkat Kesesuaian Pohon Akasia (Acacia Auriculiformis),Cemara Bundel (Cupressus Retusa), Dan Kerai Payung (Filicium Decipiens) Sebagai Tempat Hidup Anggrek Dendrobium

Jurnal Sylva Lestari ◽

10.23960/jsl2543-52 ◽

2017 ◽

Vol 5 (2) ◽

pp. 43

Author(s):

Muhammad Andry Kesuma ◽

Indriyanto Indriyanto ◽

Yusnita Yusnita

Keyword(s):

Plant Height ◽

Root Length ◽

High Frequency ◽

Host Tree ◽

Acacia Auriculiformis ◽

Experimental Unit ◽

Host Trees ◽

Randomized Design ◽

Number Of Leaves ◽

Completely Randomized Design

Dendrobium (Orchidaceae) is one of the most popular orchid genera consisting more than 2000 species, which is widely known for its long vaselife, various, shapes and colors, high frequency of flowering per year and long and flexible stalks, so it is easily assembled for flower arrangements. The objectives of this research was to study the effects of different host trees and position of plant attachment at the tree on growth of Dendrobium seedlings. This experiment was conducted with treatments arranged factorally (3 X 2) in a completely randomized design with three replicates. The first factor was the species of host three consisted of Akasia (Acacia auriculiformis), Cemara Bundel (Cupressus retusa) and Kerai Payung (Filicium decipiens) and the second factor was position of plant attachment on the tree, which consisted of attachment at the bottom ( 0,5 m above ground ) and the upper was ( 1,5 m above ground ). Each experimental unit consisted of two Dendrobium seedlings. The results showed that in general both host trees and position of attachment did not affect number of shoots, number of leaves, plant height and the longest root length. however, different host trees and its interaction with the position of attachment affected the number of roots, resulted in the highest number of roots obtained in Kerai Payung (Fillicium decipiens) at 1,5 m above ground.Keywords: Acacia auriculiformis, Cupressus retusa, host tree, Filicium decipiens, orchid.

Download Full-text

Aluminum toxicity reduces the nutritional efficiency of macronutrients and micronutrients in sugarcane seedlings

Ciência e Agrotecnologia ◽

10.1590/1413-7054202044015120 ◽

2020 ◽

Vol 44 ◽

Author(s):

Carolina Eggers Borges ◽

Jairo Osvaldo Cazetta ◽

Francisco Bruno Ferreira de Sousa ◽

Kamilla Silva Oliveira

Keyword(s):

Root System ◽

Aerial Part ◽

Dry Matter ◽

Aluminum Toxicity ◽

Mineral Nutrients ◽

Nutrient Accumulation ◽

Randomized Design ◽

Matter Production ◽

Use Efficiency ◽

Completely Randomized Design

ABSTRACT Although the effects of aluminum on the content and accumulation of mineral nutrients in crops have been studied, but nothing is known about its effect on the nutritional efficiency of sugarcane. Therefore, this study aimed to evaluate the effect of aluminum toxicity on nutritional efficiency, nutrient accumulation, and growth of sugarcane seedling. Sugarcane seedlings of the genotype IACSP95-5000, obtained from one-bud mini-cuttings (3 cm), were used in the test. Seedlings were subjected to treatments in a completely randomized design, with eight Al concentrations in the nutrient solution (0, 10, 20, 30, 40, 50, 60, and 70 mg L−1) and three replicates, totaling 24 experimental units. Analyses determined the contents, accumulation, and absorption, transport, and use efficiency of macronutrients, micronutrients, and aluminum, in addition to dry matter production. The results show that Al affected all variables analyzed, with a decrease in the nutritional efficiency of macronutrients and micronutrients and a drastic decrease in the accumulation of macronutrients in the aerial part, which reflected in the decrease in the dry matter of the plants. The root system was the most affected, with a decrease in growth of up to 60%. Aluminum reduced the use efficiency of nutrient in decreasing order: Ca (69%)> N (60%)> K (59%)> Mg (50%)> S (49%)> P (40%). As for micronutrients, the following decreasing order was observed: Fe (73%)> Zn (59%) = Cu (59%)> Mn (25%).

Download Full-text