Fusarium mirum sp. nov, intertwining Fusarium madaense and Fusarium andiyazi, pathogens of tropical grasses

Water deficiency during the dry seasons influences the relationship between water and gas exchange in tropical grasses, reducing their productive potential. In addition, the phosphorus (P) deficiency Brazilian soils adds to the set of factors limiting crop production. In this context, the objective of this study was to evaluate the responses of different tropical forage species to phosphorus supplementation as mitigating the damage caused by water stress. Seeds of Urochloa brizantha cv. MG-4, Urochloa decumbens cv. Basilisk, Panicum maximum cv. Áries, Panicum maximum cv. Tanzânia and Paspalum atratum cv. Pojuca were germinated in pots containing 10 liters of red-yellow Acrisol type soil. Experiments were conducted by combining levels of phosphorus, 8,0 and 100,0 mg of P dm-3, with two irrigation regimes, 100 and 40% replacement of transpired water. The biometric parameters, photosynthetic capacity, leaf water potential and soil chemical characteristics were evaluated, and the data was submitted to analysis of variance (ANOVA, p < 0.05), and subsequently the means were compared using a Tukey test (p < 0.05). The results showed for tropical grasses grown under water stress, there is a clear mitigating effect of phosphorus supplementation, especially on the maintenance of biomass growth.

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Soil water dynamics, herbage production and water use efficiency of three tropical grasses: Implications for use in a variable summer-dominant rainfall environment, Australia

Grass and Forage Science ◽

10.1111/gfs.12392 ◽

2018 ◽

Vol 74 (1) ◽

pp. 141-159 ◽

Cited By ~ 2

Author(s):

Sean R. Murphy ◽

Suzanne P. Boschma ◽

Steven Harden

Keyword(s):

Water Use Efficiency ◽

Soil Water ◽

Water Use ◽

Water Dynamics ◽

Soil Water Dynamics ◽

Tropical Grasses ◽

Use Efficiency

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Production of sugarcane and tropical grasses as renewable energy source. Third annual report, 1979-1980

10.2172/6818170 ◽

1980 ◽

Author(s):

Keyword(s):

Energy Source ◽

Renewable Energy Source ◽

Renewable Energy ◽

Annual Report ◽

Tropical Grasses

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BROMATOLOGIA DE GRAMÍNEAS TROPICAIS SOB DIFERENTES TENSÕES DE ÁGUA NO SOLO EM AMBIENTE PROTEGIDO

Nativa ◽

10.31413/nativa.v6i4.5588 ◽

2018 ◽

Vol 6 (4) ◽

pp. 415

Author(s):

Morgana Scaramussa Gonçalves ◽

Wilian Rodrigues Ribeiro ◽

Edvaldo Fialho Dos Reis ◽

Antônio Carlos Cóser

Keyword(s):

Soil Water ◽

Crude Protein ◽

Nutritive Value ◽

Production Systems ◽

Pasture Production ◽

Tropical Grasses ◽

Soil Water Tension ◽

Randomized Design ◽

Completely Randomized Design ◽

Water Tension

A irrigação é usada para conter os efeitos da sazonalidade de produção garantindo maior intensificação dos sistemas de produção a pasto, assim, contribuindo para o aumento da produção e do valor bromatológico das gramíneas. Dessa forma, objetivou-se com esse trabalho avaliar o valor bromatológico de gramíneas tropicais cultivadas em condições de ambiente protegido, submetidas a diferentes tensões de água no solo. Foram realizados três experimentos com as gramíneas Mombaça, Marandu e Tifton 85, onde cada qual, foi conduzida em um esquema de parcelas subdivididas, tendo nas parcelas os níveis do fator tensão de água no solo (20, 40, 50, 60 e 70 kPa) e nas subparcelas níveis 1º, 2º e 3º do fator corte, em um delineamento inteiramente casualizado com cinco repetições. Nas tensões de água no solo de 20 (Mombaça) e 50 kPa (Marandu e Tifton 85) as gramíneas expressaram seu máximo de valor nutritivo. Os maiores teores de PB foram obtidos nas gramíneas Mombaça e Tifton 85. Para as variáveis FDN e FDA o fator tensão de água no solo não foi significativo.Palavras-chave: proteína bruta, fibra, irrigação, forrageiras. BROMATOLOGY OF TROPICAL GRASSES UNDER DIFFERENT SOIL WATER TENSIONS IN PROTECTED ENVIRONMENT ABSTRACT:The irrigation is used to contain the effects of seasonality of production, ensuring a greater intensification of pasture production systems, thus contributing to the increase of production and the bromatological value of grasses. Thus, the objective of this work was to evaluate the nutritive value of tropical grasses grown under protected environment conditions, subject to different soil water stresses. Three experiments, using Mombasa, Marandu and Tifton 85 grasses under a protected environment were carried out and each one was conducted in a subdivided plots scheme, with the levels of soil water tension factor (20, 40, 50, 60 and 70 kPa) and in the subplots levels 1, 2 and 3 of the cut factor, in a completely randomized design with five replicationss. At soil water stresses of 20 (Mombasa) and 50 kPa (Marandu and Tifton 85) the grasses expressed their maximum nutritive value. The highest CP levels were obtained in the Mombasa and Tifton 85 grasses. For the NDF and ADF variables, the soil water stress factor was not significant.Keywords: crude protein, fiber, irrigation, forages.

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Nutrient digestibility in horses of tropical grasses found in semi-arid areas of the Brazilian Northeast region assessed using mobile bags

Revista Brasileira de Zootecnia ◽

10.37496/rbz5020200206 ◽

2021 ◽

Vol 50 ◽

Author(s):

Alisson Herculano da Silva ◽

Jorge Eduardo Cavalcante Lucena ◽

Juliano Martins Santiago ◽

Daniel Anderson de Souza Melo ◽

Djanira Paula Soares de Souza Silva ◽

...

Keyword(s):

Nutrient Digestibility ◽

Arid Areas ◽

Tropical Grasses ◽

Northeast Region ◽

Brazilian Northeast ◽

Semi Arid

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Production of grazed tropical grasses in different agroecosystems in Puerto Rico. III. Semiarid

The Journal of Agriculture of the University of Puerto Rico ◽

10.46429/jaupr.v72i2.7839 ◽

1969 ◽

Vol 72 (2) ◽

pp. 211-219

Author(s):

Luis E. Tergas ◽

Jaime Vélez-Santiago ◽

Angel V. Méndez-cruz

Keyword(s):

Puerto Rico ◽

Rainy Season ◽

Semiarid Region ◽

First Year ◽

Panicum Maximum ◽

Forage Production ◽

Tropical Grasses ◽

Significant Difference ◽

Second Year ◽

Cynodon Nlemfuensis

A field experiment was conducted at the Lajas Experiment Substation in the semiarid region of Puerto Rico to evaluate the production and persistence of 8 tropical grasses, Cynodon nlemfuensis Star, C. dactylon Coastcross-1, C. plectostachyus Star, Panicum maximum USDA Pl291047, Makueni, Guinea and P. maximum USDA PI 259553, and the naturalized pasture Dichanthium annulatus pajon. Small plots were grazed at 3- to 5-week intervals for 2 years. P. maximum USDA PI 259553 and Makueni were highly productive in the semiarid,.region, as well as in previous experiments in humid regions in Puerto Rico. They are highly recommended for grazing trials. P. maximum Makueni and USDA PI 291047 were the most productive during the first year, although they were not significantly different (P=0.05) from P. maximum USDA PI 259553 and Common Guinea, and Cynodon plectyostachyus Star. The production of C. nlemluensis Star was similar to that of Dichanthium annulatus but higher than that of C. dactylon Coastcross-1 (P=0.05). The average production for all grasses declined at the beginning of the year, during the cool short days in February and March, 1983, without any significant difference (P=0.05) among species and cultivars. Production increased at the beginning of the rainy season, but it was low at the peak of the rainy season because of trampling in poorly aerated and compact soils. C. plectostachyus Star was the most productive grass during the second year of experiment, although it was not significantly different (P=0.05) from P. maximum USDA PI 291017 and 259553 and cultivar Makueni. The production of Common Guinea and that of D. annulatus were. similar and higher than that of C. nlemfuensis Star and C. dactylon Coastcross-1 (P=0.05), which did not persist at the end of the experiment. Forage production during the second year was lower than in the first year because of less rainfall in 1983. The mean CP content of all grasses varied from 11.29 to 14.05, except that of D. annulatus, which was only 9.73%. CP content was lower during the periods of maximum forage production.

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