Algumas considerações sobre o sistema radicular de plantas forrageiras

Silva, Guilherme de Lira Sobral; Carneiro, Maria Socorro de Souza; Furtado, F. M. V.; Santos, F. J. de S.; Silva, Maykon Sousa da; Costa, N. de L.; Magalhães, João Avelar

doi:10.22256/pubvet.v8n6.1687

Cited by 2 publications

(4 citation statements)

References 17 publications

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“…The nitrogen content of litter was lower (P < 0.05) for pastures fertilized with an N level of 400 kg (Table 7), with no interaction between fertilization and supplementation for this nutrient. The results are coherent, considering the mobility of N in the plant (SILVA et al, 2014). The smaller portion of nitrogen compounds in the degrading material probably resulted from remobilization to the younger parts of the plant.…”

Section: Littersupporting

confidence: 51%

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Nutrient cycling in dairy systems under different levels of intensification

Chaves,

Silva,

Cândido

et al. 2024

RCA

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The objective was to evaluate the eff ect of intensifying dairy systems on the uptake and return of nutrients in pastures.The experiment was conducted using four milk production systems on Mombasa grass pastures in the humid tropics, during the rainy season in 2009. This was a 2 x 2 factorial (two nitrogen fertilization levels and concentrate supplement or not for grazing animals) completely randomized design with four replications (paddocks). Nitrogen levels corresponded to 400 and 800 kg. ha -1 .year -1 , and supplementation was given to only two out of four groups of animals with milk yield above 11 L. day -1 . Pastures fertilized with the highest nitrogen level had higher contents of macronutrients in plant tissues and the litter but resulted in lower concentrations of N and Ca in feces. The uptake of macronutrients per grazing cycle was also higher in these pastures. The supplementation caused a decreasing eff ect on the content of N in dead pasture material, P in litter, and Ca, Mg, and P in feces. Decomposing litter represents the main source of nutrient return to the pasture, especially calcium, phosphorus, and nitrogen.

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Section: Littersupporting

confidence: 51%

“…Root growth can be stimulated at a dose of 400 kg N, which may have contributed to the accumulation of P in dead tissues. In a review, Silva et al (2014) found that the greatest root growth of P. guenoarum occurred at a dose of 400 kg.ha -1 .…”

Section: Resultsmentioning

confidence: 99%

Nutrient cycling in dairy systems under different levels of intensification

Chaves,

Silva,

Cândido

et al. 2024

RCA

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“…Silva et al (2009) evaluated seven cultivars of Panicum maximum (including Massai, Mombasa and Tanzania) and observed that flooding significantly reduced total forage production. Silva et al (2014) explain that the production capacity of the shoots of a plant is a result of the action of its root system, as both interact. Root growth under physically limited conditions significantly reduces the total weights of the plants, suggesting that this growth is related to the functional capacity of the root system and also the balance between the root system and shoots will always be reestablished.…”

Section: Shoot Dry Mass Of the Panicum Maximum Grassmentioning

confidence: 99%

“…The higher values of root mass and volume result in greater exploration in the soil profile, which leads to greater utilization of nutrients and capacity to reach deeper water reserves (Silva et al, 2020). The growth of forage species is represented not only by the aerial part, but also by its root development, since the root is the path for the entry of water and nutrients (Silva et al, 2014;Silva et al, 2020). When comparing the two extreme conditions to which the plants were subjected, it can be noted that in the flooded soil, the cultivar BRS Zuri produced the higher root dry mass and root volume compared to plants that received the lowest water availability.…”

Section: Root Dry Mass and Volume Of The Panicum Maximum Grassmentioning

confidence: 99%

November 2022

2022

Aust J Crop Sci

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Due to the increasing intensification of livestock farming and agricultural systems, there is demand for highly productive forage species. Panicum maximum cv. BRS Zuri is forage that has good productivity, vigor and promotes good animal performance. The objective of this study was to evaluate the morphophysiological and production characteristics of Panicum maximum cv. BRS Zuri subjected to water availability in Fluvic Neosol (Entisol). A potted-plant experiment was conducted in a greenhouse at the Federal University of Rondonópolis, Brazil. The experimental design was completely randomized, with five levels of water availability, corresponding to 25, 50, 75, 100 and 125 % of the maximum soil water holding capacity, and six replicates, in three successive cuts. The variables analyzed were: soil pH, SPAD index, plant height, leaf area, shoot dry mass, root dry mass, root volume, water consumption and water use efficiency. Water availability influenced the development of Panicum maximum cv. BRS Zuri, with the highest results between 67 % and 111 % of the maximum soil water holding capacity. The results show that the production and morphological responses were negatively influenced by water availability levels of 25 % and 125 %. These results makes it possible to affirm that, under the studied conditions, the cultivar BRS Zuri showed moderate adaptation to 125% water availability (excess water).

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Algumas considerações sobre o sistema radicular de plantas forrageiras

Cited by 2 publications

References 17 publications

Nutrient cycling in dairy systems under different levels of intensification

Nutrient cycling in dairy systems under different levels of intensification

November 2022

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