Results: 34

Genetic parameters and path analysis of traits of upland cotton for the brazilian semi-arid region

Biosci. j. (Online); 35 (6), 2019
Upland cotton fiber is one of the most used natural fibers in the production of textile materials worldwide. For this reason, the selection of genotypes that meet the industry’s requirements is one of the main goals of cotton breeding programs. This study aimed to estimate the phenotypic ...

Agro-economic profitability of sweet potato cultivars as a function of the harvest age and times of cultivation in the semi-arid

Biosci. j. (Online); 35 (5), 2019
The objective of this work was to evaluate the profitability of sweet potato cultivars, harvested at different ages and cultivated in different periods (rainy and dry) in the municipality of Mossoró, semi-arid region of Rio Grande do Norte. The experimental design ...

Structural and productive features of panicum cultivars submitted to different rest periods in the irrigated semiarid region of Brazil

Biosci. j. (Online); 35 (3), 2019
The objective of this study was to evaluate the structural and productive features of Panicum maximum cultivars (Tanzânia, Mombaça, Massai, and Zuri) in three rest periods (30, 45 and 60 days), in the semiarid region of Brazil. The experiment was carried out in a completely randomized desi...

Green onion production under strategies of replacement and frequencies of circulation of brackish nutritive solutions

Biosci. j. (Online); 35 (3), 2019
The cultivation of vegetables in semi-arid regions, especially in the context of the use of brackish water, has been made possible by the use of the hydroponics technique. Thus, two experiments were carried out between December 2016 and January 2017 in a protected environment at the Federal ...

Variation of the water table and salinity in alluvial aquifers of underground dams in the semi-arid regio n of Rio Grande do Norte, Brazil

Biosci. j. (Online); 35 (2), 2019
Despite the growing progress in the construction of underground dams, there are few studies to evaluate and monitor these reservoirs after their construction. Thus, a research study was carried out to evaluate the water table level in alluvial aquifers and water salinity in four underground da...

Growth and physiology of annona squamosa l. under different irrigation depths and phosphate fertilization

Biosci. j. (Online); 35 (2), 2019
This study aimed to evaluate the growth and physiology of Annona squamosa seedlings under increasing irrigation depths and phosphorus doses. The experiment was conducted in protected environment, evaluating five irrigation depths and four P2O5- doses, arranged in 5 x 4 ...

Morfometria de cladódios de Opuntia stricta sob lâminas de irrigação e adubação orgânica no semiárido paraibano

A Palma Forrageira é uma planta xerófila de grande importância para a manutenção da pecuária nordestina, sobretudo, durante os períodos de estiagem. No entanto, diante da necessidade da recuperação dos palmais destruídos pela cochonilha do carmim, faz-se necessário conhecer os efeitos das prá...

Ecophysiology of west indian cherry irrigated with saline water under phosphorus and nitrogen doses

Biosci. j. (Online); 35 (1), 2019
The quantitative and qualitative scarcity of water resources is a frequent problem in the semi-arid region of the Brazilian Northeast. The availability of water for irrigation with high content of dissolved salts is common, affecting the growth and development of the crops. Thu...

Influence of natural radon and metal contamination on surface water quality from a Brazilian Semiarid Region

Acta sci., Biol. sci; 39 (3), 2017
The Brazilian semiarid region presents some adverse environmental conditions for the settled population such as a restricted water availability and the presence of radon and metal natural sources that can contaminate the water reservoirs and consequently become a concern for human health. The present stu...

The genus Senna Mill. (Leguminosae: Caesalpinioideae) in a fragment of the Ecological Station Raso da Catarina, Bahia, Brazil

Acta sci., Biol. sci; 39 (3), 2017
Senna comprises about 300 species with circuntropical distribution, widely represented in the Americas, also occurring in Africa, Australia, Asia and Oceania. The Brazil includes 80 species, of which 27 are endemic, 50 reported from Bahia and 22 recorded from the Caatinga. The floristic survey of Senna i...