scholarly journals Yield components and morphogenesis of Aruana grass in response to nitrogen supply

2004 ◽  
Vol 61 (6) ◽  
pp. 632-639 ◽  
Author(s):  
José Lavres Jr. ◽  
Maria Del Carmen Ferragine ◽  
Luciana Gerdes ◽  
Roberto Wagner Cavalcanti Raposo ◽  
Michelle Nazaré Xavier da Costa ◽  
...  
Keyword(s):  
Block Design ◽  
Morphological Characteristics ◽  
Panicum Maximum ◽  
Yield Attributes ◽  
Randomized Block Design ◽  
Appearance Rate ◽  
Leaf Appearance Rate ◽  
Set Up ◽  
N Rates ◽  
Leaf Appearance

Areas with Aruana grass (Panicum maximum Jacq.) in Brazilian pastures, especially those used by sheep, have expanded due to yield and morphological characteristics of this grass that are favorable to these animals. Nevertheless, the knowledge concerning yield attributes of this grass in relation to nitrogen fertilization is very limited. The objective of this research was to evaluate yield and physiological attributes in this forage grass when grown in nutrient solutions containing N rates. The experiment was carried out in a greenhouse with plastic pots containing ground quartz as substrate, during the Spring season. Six N rates in the solution (14, 112, 210, 294, 378, and 462 mg L-1), with 70% N-NO3- and 30% N-NH4+ were tested. Experimental units were set up in a completely randomized block design, with four replications. Plants were harvested at 35 days after the seedlings were transplanted to the pots and again at 28 days after the first harvest. After the second harvest, the roots were taken from the substrate. In both growing periods, dry matter yield for plant tops and roots, leaf area, number of expanded green leaves, number of tillers, leaf appearance rate, and phyllochron were significantly affected by the N rates, and the data were adjusted to a second-order model. Aruana grass required high rates of N to show maximum response in those variables.

scholarly journals Effects of stubble height and season of the year on morphogenetic, structural and quantitative traits of Tanzania grass

2021 ◽  
Vol 9 (3) ◽  
pp. 256-267
Author(s):  
Nauara Moura Lage Filho ◽  
Aline Da Rosa Lopes ◽  
Aníbal Coutinho Do Rêgo ◽  
Felipe Nogueira Domingues ◽  
Cristian Faturi ◽  
...  
Keyword(s):  
Stem Elongation ◽  
Block Design ◽  
Climatic Conditions ◽  
Elongation Rate ◽  
Panicum Maximum ◽  
Area Index ◽  
Appearance Rate ◽  
Leaf Appearance Rate ◽  
Guinea Grass ◽  
Leaf Appearance

The objective of this study was to evaluate regrowth period (RP), morphogenetic, structural and productive characteristics of the guinea grass cultivar Tanzania [Megathyrsus maximus (syn. Panicum maximum)] under different stubble heights (SH) during dry (DS) and rainy (RS) seasons in the eastern Amazon region. The treatments were: 5, 15, 25, 35, 45 and 55 cm SH, distributed in a randomized complete block design with 6 replicates. In the 2 seasons, RP decreased linearly with increase in SH, and was considerably shorter in the RS (47 d). Leaf appearance rate decreased linearly from 0.071 to 0.051 leaves/tiller/d with increasing SH, and it was higher during the RS. Increase in SH increased leaf elongation rate, stem elongation rate and leaf area index. In the RS, climatic conditions favored the morphogenesis, resulting in higher herbage accumulation (8,693 kg DM/ha) than in the DS (2,597 kg DM/ha). In associating seasons with SH, we recommend that Tanzania grass be managed at SH between 35 and 45 cm in the DS, resulting in RP from 61 to 64 days, and at SH of 35 cm in the RS, resulting in RP of 41 days. Studies to test this management strategy seem warranted.

scholarly journals Corn production for silage intercropped with forage in the farming-cattle breeding integration

2014 ◽  
Vol 34 (4) ◽  
pp. 738-745 ◽  
Author(s):  
Veridiana Z. de Mendonça ◽  
Luiz M. M. de Mello ◽  
Francisco C. B. L. Pereira ◽  
José O. da R. Silva ◽  
Élcio H. Yano
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Morphological Characteristics ◽  
Ground Cover ◽  
Dry Matter Production ◽  
Panicum Maximum ◽  
Corn Yield ◽  
Corn Production ◽  
Randomized Block Design ◽  
Matter Production

Corn cropping for silage, due to the plant material exportation, intercropping with forage provides greater ground cover and straw formation for the Direct Planting System (DPS) continuity. The objective of this study was to evaluate corn production for silage in DPS intercropped with four forages (Urochloa brizantha cv. Marandu, U. ruziziensis cv. Ruziziensis, Panicum maximum cv. Tanzânia and P. maximum cv. Áries). We applied three sowing methods (in row together with corn fertilizer; by no-till sowing simultaneously to corn sowing and at V4 corn stage) and corn without intercropping. The experiment was conducted in autumn/ winter of 2010, in Selvíria - MS, in a randomized block design in factorial arrangement (4 x 3 + 1) and 4 replications. For corn, we evaluated plant height, basal stem diameter, initial and final stand and silage production and for forage dry matter production. Morphological characteristics and corn yield were not affected by intercropping when compared to sole corn crop. Forage dry matter production sown in corn row with fertilizer is a highlight, which in addition to providing greater productivity, harnesses the operation during sowing.

scholarly journals Morphogenic and structural characteristics of Panicum cultivars during the establishment period in the Brazilian Northeast

2020 ◽  
Vol 43 ◽  
pp. e50984
Author(s):  
Ana Beatriz Graciano da Costa ◽  
Gelson dos Santos Difante ◽  
Antonio Leandro Chaves Gurgel ◽  
Emmanuel Lievio de Lima Veras ◽  
Jéssica Gomes Rodrigues ◽  
...  
Keyword(s):  
Population Density ◽  
Leaf Blade ◽  
Structural Characteristics ◽  
Stem Elongation ◽  
Elongation Rate ◽  
Panicum Maximum ◽  
Appearance Rate ◽  
Leaf Appearance Rate ◽  
Leaf Appearance ◽  
Brazilian Northeast

This study aimed to evaluate the morphogenic and structural characteristics of six Panicum maximum cultivars during the establishment period. A completely randomized block design with four replicates and six treatments (Tamani, Mombaça, Massai, Tanzania, Aruana and Zuri cultivars) was used. Morphogenic (leaf appearance rate, leaf elongation rate e stem elongation rate), structural (final leaf length, tiller population density e number of leaves per tiller) and productive (forage mass, leaf blade mass, stem mass, senescent material mass and leaf:stem ratio) characteristics were evaluated. There was no difference (p > 0.05) between the cultivars in terms of the number of live leaves per tiller (2.95 leaves/tiller). Mombaça cultivar had (p < 0.05) higher canopy height (50.64 cm) compared with other cultivars. The highest (p < 0.05) tiller population density was observed in Tamani (235.90 tillers m-2) and Massai (201.60 tillers m-2) cultivars. Leaf lifespan (54.18 days), phyllochron (17.40 days/leaf) and leaf senescence rate (0.87 cm tiller day-1) were not different (p > 0.05) between cultivars. However, leaf appearance rate was higher (p < 0.05) in Tanzania (0.07 leaves tiller day-1) than in Aruana cultivar (0.05 leaves tiller day-1). Leaf blade mass was higher (p < 0.05) in Mombaça cultivar (1518.31 kg DM ha-1), whereas Massai showed higher (p < 0.05) leaf:stem ratio (9.25). Panicum cultivars Tamani, Tanzania and Massai establishment after 75 days, while the other cultivars establish at 105 days of sowing in the Brazilian Northeast.

scholarly journals Soybean oversowing with Urochloa brizantha and Panicum maximum and the straw formation in a no-tillage system

2016 ◽  
Vol 37 (3) ◽  
pp. 1209
Author(s):  
Núbia Maria Correia ◽  
Leonardo José Petean Gomes
Keyword(s):  
Mass Production ◽  
Block Design ◽  
Dry Mass ◽  
Development Stage ◽  
Panicum Maximum ◽  
Forage Crops ◽  
Randomized Block Design ◽  
Tillage System ◽  
Set Up ◽  
Urochloa Brizantha

The objective of this study was to evaluate the soybean oversowing with braquiarão (Urochloa brizantha cv. Marandu) and colonião (Panicum maximum cv. Aruana) and the capacity of these forage crops to produce dry mass during the fall-winter-spring period. Two experiments, one for each forage species, were conducted in field conditions in the 2011/2012 season and were repeated in 2012/2013. The experimental set-up was arranged in a randomized block design with four repetitions in a 2 x 5 factorial. The soybean oversowing was studied in the development stages R6 and R8 (2011/2012) or R5 and R8 (2012/2013) with braquiarão or colonião grass in five seed amounts (200, 400, 600, 800 and 1000 points of cultural value – PCV = seeds amount x culture value). In both seasons, the braquiarão oversowing at soybean stages R5 and R6 resulted in higher dry mass production, when compared to stage R8. Additionally, the amount of 600 seeds PCV was sufficient to obtain an excellent percentage of soil cover (&gt;95%), in addition to the satisfactory number of plants per m2 and the dry mass production. On the other hand, independent of the soybean development stage in the oversowing moment, colonião was not promising for use in this sowing type because its low stand and irregular soil covering, even at the higher seed amounts.

scholarly journals Morphogenic and structural characteristics and chemical composition of grass aruana, submitted to nitrogen fertilization

2019 ◽  
Vol 40 (6Supl2) ◽  
pp. 3167 ◽  
Author(s):  
Alice Mariana Hupp Sacramento ◽  
Olga Cedro de Menezes ◽  
Tarcísio Marques Barros ◽  
Diego Novais Pinheiro ◽  
Soraya Maria Palma Luz Jaeger ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Nitrogen Fertilization ◽  
Structural Characteristics ◽  
Block Design ◽  
Dry Mass ◽  
Leaf Length ◽  
Panicum Maximum ◽  
Nitrogen Levels ◽  
Randomized Block Design ◽  
Leaf Appearance

This study aimed at evaluating the morphogenic and structural characteristics of Panicum maximum Jacq. cv. Aruana, as well as its chemical composition after submitting it to different nitrogen levels. The experiment was performed by adopting a randomized block design which included four treatments (0, 75, 150 and 225 kg ha-1 of N) and three replications, in 100 m2 plots. Twice a week, for the 63 days of regrowth, the morphogenic characteristics were determined and estimated, after which the chemical composition was assessed. The aruana grass revealed a quadratic and positive response to the nitrogen fertilization, and showed a remarkable rise in the elongation rates, leaf appearance and senescence, besides the number of live leaves per tiller and final leaf length. However, the nitrogen fertilization reduced the phyllochron and leaf life in the aruana grass, implying the direct effect of nitrogen on the flow of tissues. A quadratic and positive effect of the nitrogen fertilization was observed for the dry mass production, from 5,840.80 kg ha-1 for plants lacking the nitrogen fertilization to 8,862.55 kg ha-1 for those fertilized with 225 kg ha-1 of N. Thus, while the nitrogen fertilization positively affected both tillering and morphogenesis, the N doses used in this study were insufficient to induce any change in the chemical composition of the aruana grass.

Management of Aries and Aruana Guinea grass cultivars under rotational stocking based on canopy light interception

2021 ◽  
pp. 1-19
Author(s):  
F. P. Campos ◽  
P. Sarmento ◽  
W. T. Mattos ◽  
L. Gerdes ◽  
R. A. Carnevalli ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Nutritional Quality ◽  
Block Design ◽  
Production Capacity ◽  
Morphological Characteristics ◽  
Light Interception ◽  
Panicum Maximum ◽  
Dry Matter Digestibility ◽  
Randomized Block Design

Abstract Efforts were made to obtain forage cultivars with high production capacity and quality and to determine the ideal time to start animal grazing, respecting the morphological characteristics of the grasses. For this purpose, the nutritional value, digestibility and characteristics of the forage canopy of Aries and Aruana (Megathyrsus maximus (Jacq.) or Panicum maximum) cultivars kept under rotational stocking with sheep were evaluated and the management height was determined based on 95% light interception (LI). The experiment was evaluated with repeated measures over time (grazing cycles by season, in 2 years) with a treatment factor (grass cultivar) in a completely randomized block design with eight replicates, using 800 m2 paddocks. The height of the forage canopy before grazing (pre-grazing) determined by 95% LI stabilized around 29 cm. The highest proportion of Aruana leaf blades was observed in winter. Aries grass presented similar leaf blade percentages in summer, autumn and spring. Similar forage accumulation (FA) was observed for both cultivars, decreasing in spring, autumn and winter. Higher crude protein and in vitro dry matter digestibility (IVDMD) were seen in Aries grass, while Aruana grass presented higher neutral and acid detergent fibre and cellulose and lower IVDMD. The nutritional quality of the grasses was maintained throughout the year. The height of the forage canopy of Aries and Aruana recommended for entry into the paddock is 29 cm to maintain nutritional quality. The successful management strategy adopted for grasses combined with nitrogen fertilization provided a greater forage mass quality.

scholarly journals Influence of foliar fertilization with amino acid preparations on morphological traits and seed yield of timothy

2018 ◽  
Vol 64 (No. 5) ◽  
pp. 209-213 ◽  
Author(s):  
Radkowski Adam ◽  
Radkowska Iwona
Keyword(s):  
Amino Acid ◽  
Seed Yield ◽  
Block Design ◽  
Morphological Characteristics ◽  
Application Rate ◽  
Control Plot ◽  
Plant Production ◽  
Foliar Fertilization ◽  
Randomized Block Design ◽  
Set Up

The aim of the study was to determine the influence of amino acid fertilizer on yielding ability, morphological characteristics and chlorophyll index of timothy cv. Owacja grown for seed. The experiment was conducted in 2015–2017 at the Experimental Station in Prusy near Krakow, which belongs to the Institute of Plant Production of the University of Agriculture in Krakow. The field trial was set up as a randomized block design with four replications. The soil in the experimental field was a degraded chernozem formed from loess. The plots were sprayed with three doses of Microfert amino acid fertilizer: 1.8, 3.0 and 4.5 L/ha. The highest application rate of foliar fertilization with amino acids (4.5 L/ha) caused a significant (P ≤ 0.05) increase in seed yield and germination capacity compared with the control plot. Successive years of use also had a significant effect on timothy seed yield, which was the highest during the first year of the study. Morphological characteristics were found to improve (taller and longer inflorescences and leaf blades). Satisfactory results (seed yield higher by about 11% to the control plot) were also obtained on the plots where the fertilizer was applied at the rate of 3.0 L/ha.

scholarly journals Nitrogen rates associated with the inoculation of Azospirillum brasilense and application of Si: Effects on micronutrients and silicon concentration in irrigated corn

2018 ◽  
Vol 3 (1) ◽  
pp. 510-523 ◽  
Author(s):  
Fernando Shintate Galindo ◽  
Marcelo Carvalho Minhoto Teixeira Filho ◽  
Salatiér Buzetti ◽  
Willian Lima Rodrigues ◽  
Guilherme Carlos Fernandes ◽  
...  
Keyword(s):  
Azospirillum Brasilense ◽  
Block Design ◽  
Silicon Concentration ◽  
Zn Uptake ◽  
No Till ◽  
Randomized Block Design ◽  
Micronutrient Uptake ◽  
Set Up ◽  
N Rates ◽  
Nitrogen Rates

Abstract The aim of this study was to analyze whether there are differences between the inoculation with Azospirillum brasilense and the silicon application, thus enabling a higher efficiency of nitrogen fertilization, evaluating micronutrients and silicon concentration in shoots and roots of irrigated corn (Zea mays). The experiment was conducted in Selviria, Brazil, under a no-till system, on a Typic Rhodic Hapludox. The experiment was set up as a randomized block design with four replications, in a 2 × 5 × 2 factorial arrangement consisting of two soil corrective sources (dolomitic limestone and Ca and Mg silicate as source of Si); five N rates (0, 50, 100, 150 and 200 kg ha-1); with and without inoculation with A. brasilense. N rates increased B, Cu and Fe concentrations in shoots and B, Cu, Fe, Mn, Zn and Si in roots. Inoculation provided greater concentrations of B and Fe in shoots, and B in roots. Although inoculation with A. brasilense favored micronutrient uptake, it negatively affected Si concentration in shoots in 2015/16 crop. The use of Si in the form of Ca and Mg silicate promotes an increase in Mn, Si and Zn uptake in shoots and Mn and Si concentration in roots.

scholarly journals Estimating leaf appearance rate and phyllochron in safflower (Carthamus tinctorius L.)

2005 ◽  
Vol 35 (6) ◽  
pp. 1448-1450 ◽  
Author(s):  
Nereu Augusto Streck ◽  
Rogério Antonio Bellé ◽  
Edileusa Kersting da Rocha ◽  
Mariângela Schuh
Keyword(s):  
Linear Regression ◽  
Block Design ◽  
Carthamus Tinctorius ◽  
Time Interval ◽  
Angular Coefficient ◽  
Base Temperature ◽  
Appearance Rate ◽  
Leaf Appearance Rate ◽  
Leaf Appearance ◽  
Santa Maria

Safflower may be an interesting option for the flower market, either as fresh or dried cut flower. Estimating the leaf appearance rate and the phyllochron (the time interval between the appearance of successive leaves) is important for calculating the number of emerged leaves (NL) on the plant, which is an excellent measure of plant development. The objective of this study was to estimate the leaf appearance rate and the phyllochron in safflower (Carthamus tinctorius L.). An experiment was conducted in Santa Maria, RS, Brazil, inside an 8 x 15m plastic greenhouse. Sowing was on 03 October 2003 and emergence was on 08 October 2003. The experimental design was a randomized complete block design with three replications. The main stem NL was measured twice a week from 24 October 2003 to 15 November 2003 in four plants per replication. Daily growing degree days above a base temperature (5°C) and accumulated thermal time (TT) were calculated. The NL was linearly regressed against TT. The angular coefficient of the linear regression is the LAR (leaves/ °C day) and the phyllochron (°C days/leaf) was estimated by the inverse of the angular coefficient of the linear regression. The LAR was 0.0467 ± 0.0203 leaves/ °C day and the phyllochron was 25.5 ± 14.6°C days/leaf.

scholarly journals Morphogenetic characteristics of three Brachiaria brizantha cultivars submitted to nitrogen fertilization

2013 ◽  
Vol 85 (1) ◽  
pp. 371-377 ◽  
Author(s):  
Marcos F Silva ◽  
Edson M. V Porto ◽  
Dorismar D Alves ◽  
Cláudio M.T Vitor ◽  
Ignacio Aspiazú
Keyword(s):  
Nitrogen Fertilization ◽  
Leaf Blade ◽  
Elongation Rate ◽  
Leaf Elongation ◽  
Brachiaria Brizantha ◽  
Nitrogen Levels ◽  
Appearance Rate ◽  
Leaf Elongation Rate ◽  
Leaf Appearance Rate ◽  
Leaf Appearance

This study aims to evaluate the morphogenetic characteristics of three cultivars of Brachiaria brizantha subjected to nitrogen fertilization. The design was a randomized block in factorial arrangement 4x3; three cultivars of B. brizantha - Marandu, Piatã, Xaraés and four nitrogen levels - 0, 80, 160 and 240 kg/ha, with three replications. The experimental units consisted of plastic pots filled with 5 dm3 of soil. Thereupon the establishment fertilization, varieties were sowed directly in the pots, leaving, after thinning, five plants per pot. Forty-five days after planting, it was done a standardization cut at 10 cm tall. Nitrogen levels were distributed according to the treatments, divided in three applications. The morphogenetic characteristics were evaluated in three tillers per sampling unit and data were submitted to analysis of variance and regression. For all evaluated characteristics there was no interaction between factors cultivar and nitrogen levels, verifying only the effects of nitrogen on the variables leaf appearance rate and phyllochron. The dose 240 kg/ha of N corresponds to the greater leaf appearance rate. Cultivar Marandu shows the higher leaf blade: pseudostem and ratio of leaf elongation rate and elongation pseudostem, which favors higher forage quality.

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