Chemical composition and photosynthetically active radiation of forage grasses under irrigation

Silva, Edilane Aparecida da; Silva, Wilson Jesus da; Barreto, Antônio Carlos; Oliveira, Antonio Barbosa de; Paes, José Mauro Valente; Ruas, José Reinaldo Mendes; Queiroz, Domingos Sávio

doi:10.1590/s1516-35982012000300015

Cited by 6 publications

(8 citation statements)

References 19 publications

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“…The higher crude protein (CP) content obtained in the WH irrigation-fertilization in the cultivation of cactus pear was because the plant in this treatment suffered water stress, which in forage plants can increase their cellular content, especially CP content [ 54 , 55 ]. The application of fertilizers via localized irrigation is recommended, as small doses of micronutrients in a small volume of soil because conventional dosage can be phytotoxic.…”

Section: Discussionmentioning

confidence: 99%

Copolymerized Natural Fibre from the Mesocarp of Orbignya phalerata (Babassu Fruit) as an Irrigating-Fertilizer for Growing Cactus Pears

et al. 2020

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Cactus pears face challenges due to global climate change, which is leading to in-depth research to monitor and increase their water activity. The objective of this study was to evaluate the use of the natural test hydrogel (TH) from Orbignya phalerata fibre as nutrients and water for growing cactus pear genotypes (“Baiana” and “Doce” [Nopalea cochenillifera], ‘Gigante’ [Opuntia fícus-indica], and “Mexican Elephant Ear” [Opuntia stricta]) compared to the use of commercial hydrogel (CH), which is based on polymers composed of polyacrylamide, and a treatment without the use of hydrogel (WH). A completely randomized design was used, in a factorial scheme (4 × 3), with four genotypes of cactus pear and three forms of hydration, with five replications. The number and area of cladode was greatest (p < 0.01) in plants with CH and TH irrigation-fertilization in the ‘Doce’ cactus genotype. The dry biomass of the cladode and root in the ‘Gigante’ cactus genotype was greatest (p < 0.01) in the treatments with CH and TH irrigation-fertilisation. The ‘Baiana’, ‘Doce’, and ‘Gigante’ cactus genotypes exhibited more (p < 0.01) dry matter content with the TH irrigation-fertilisation. The highest (p < 0.01) neutral detergent fibre content was observed in the ‘Baiana’ and ‘Doce’ cactus genotypes when irrigation occurred with WH treatment, and the highest acid detergent fibre content in the ‘Gigante’ genotype. The copolymerized natural fibre from the mesocarp of Orbignya phalerata (babassu fruit) induced a better growth and chemical composition of cactus pear genotypes than the hydrogel based on polymers composed of polyacrylamide.

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Section: Discussionmentioning

confidence: 99%

Copolymerized Natural Fibre from the Mesocarp of Orbignya phalerata (Babassu Fruit) as an Irrigating-Fertilizer for Growing Cactus Pears

et al. 2020

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“…El comportamiento de esta variable es inverso en el eje de ordenadas. Los datos reportados por (Juárez, et al 2009) promedian 4.64% en el pasto Tanzania al inicio de la floración, por su parte (Silva, et al 2012) muestra promedios de 15.3% de PC a los 35 días de corte en un ensayo realizado bajo sistema de riego y fertilización nitrogenada. En otro estudio el pasto Tanzania , el promedio de PB es 8,60 % a los 21 días de corte, mientras que (Patiño, et al 2018), mostró un incremento gradual (11%) entre los 25 y 45 días; el promedio de PB fue de 11,7%.…”

Section: Producción De Biomasaunclassified

“…Las diferencias (p<0,05) se muestran conforme avanza la madurez del pasto, 55,22; 65,42 y 69,08 a los 20, 25 y 30 días respectivamente. ) a los 85 días previo al pastoreo los niveles de FDN fueron 66,1%, (Silva, et al 2012) a los 35 días de corte promedió 70.9% ) a los 21 días de corte obtuvo valores de 65.29 %, (Patiño, et al 2018), en promedio reportó 71,2%.…”

Section: Composición Química (Análisis Proximal)unclassified

Respuesta morfológica, nutricional y productiva del Pasto Tanzania Panicum maximum cv. a tres edades de corte

Cedeño¹,

Zambrano²,

Álava³

et al. 2019

prosciences

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Resumen: El objetivo de la investigación fue evaluar el efecto de tres edades; 20, 25 y 30 días de corte del pasto Panicum maximum cv. Tanzania las variables de morfología del pasto, producción de biomasa, análisis química proximal , Fibra detergente neutra( FDN),fibra detergente ácida (FDA), lignina y perfil mineral sobre cinco elementos P, K, Ca, Mg y Cu. El ensayo estaba constituido por 24 unidades experimentales divididas en tres tratamientos y ocho repeticiones, para su estudio se utilizó un diseño de bloque al azar (DBCA) los resultados fueron sometidos al análisis estadístico mediante el programa Infostat y se utilizó la prueba de comparaciones múltiples de Duncan 5%. De acuerdo con las respuestas morfológicas el pasto Tanzania mostró (p<0,05) mayor crecimiento a los 30 días, con una relación Hoja tallo favorable (p<0,05) a los 20 días. En el número de hojas y tamaño de la hoja no se observaron diferencias, en cuanto a la variable producción el mayor rendimiento (p<0,05). Fue a los 30 días de corte. El análisis proximal favorable a las tempranas edades de corte (20 y 25 días) para los niveles (p<0,05) de PB, y ELNN, mientras que la edad de 30 días (p<0,05). a los niveles de MI, EE, FB. El análisis de Van Soest, favorece a la edad intermedia 25 días y para el perfil mineral siempre fue favorable (p<0,05) a los 20 días de corte a excepción del Cu. Palabras clave ─ Tanzania, morfología, producción, biomasa.Abstract: The objective of the research was to evaluate the effect of three ages; 20, 25 and 30 days of grass cutting Panicum maximum cv. Tanzania, the variables of pasture morphology, biomass production, proximal chemical analysis, neutral detergent fiber (NDF), acid detergent fiber (FDA), lignin and mineral profile over five P, K, Ca, Mg and Cu elements. The trial consisted of 24 experimental units divided into three treatments and eight repetitions, for their study a random block design (DBCA) was used, the results were subjected to statistical analysis through the Infostat program and the Duncan 5% multiple comparisons test was used, According to morphological responses, Tanzania grass showed (p <0.05) greater growth at 30 days, with a favorable leaf stem ratio (p <0.05) at 20 days. In the number of leaves and size of the leaf, no differences were observed, regarding the production variable the highest yield (p <0.05). It was after 30 days of cutting. The proximal analysis favored the early cut-off ages (20 and 25 days) for the levels (p <0.05) of PB, and ELNN, while the age of 30 days (p <0.05) to the levels of MI, EE, FB. The Van Soest analysis, favors the intermediate age 25 days and for the mineral profile was always favorable (p <0.05) at 20 days of cut except for Cu.

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“…According to Silva et al . (2012), greater availability of N and water and soil and greater solar radiation increase the photosynthetic efficiency, which activates the enzymes RuBisCO (ribulose 1,5-bifosfate carboxylase oxygenase) and PEP (phosphoenolpyruvate carboxylase), thus increasing leaf blade CP. The increase in the CP of the leaf blades, stems + sheaths and whole plants of the Aries and Aruana cultivars in the present experiment probably occurred due to the higher photosynthetic efficiency provided by nitrogen fertilization in the soil.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2021

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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.

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Chemical composition and photosynthetically active radiation of forage grasses under irrigation

Abstract: -The present study aimed to estimate the photosynthetically active radiation of tropical forage grasses in ten cutting dates, under irrigation. The following treatments were used: Brachiaria decumbens grass (Brachiaria decumbens

Cited by 6 publications

References 19 publications

Copolymerized Natural Fibre from the Mesocarp of Orbignya phalerata (Babassu Fruit) as an Irrigating-Fertilizer for Growing Cactus Pears

Copolymerized Natural Fibre from the Mesocarp of Orbignya phalerata (Babassu Fruit) as an Irrigating-Fertilizer for Growing Cactus Pears

Respuesta morfológica, nutricional y productiva del Pasto Tanzania Panicum maximum cv. a tres edades de corte

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

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