RESUMO A moringa possui características de adaptação à região semiárida, como tolerância a salinidade e deficiência hídrica, crescendo e desenvolvendo-se em solos de baixa fertilidade, tendo várias utilizações como alimentação humana e animal, medicinal, purificação de água, controle de pragas, adubação verde, etc. Assim, o objetivo deste trabalho foi avaliar a melhor dose de esterco ovino na produção de mudas de moringa. Os tratamentos utilizados foram: T 1 : testemunha (zero grama de esterco ovino); T 2 : 10 gramas de esterco ovino; T 3 : 20 gramas de esterco; T 4 : 30 gramas de esterco ovino; T 5 : 40 gramas de esterco ovino e T 6 : 50 gramas de esterco ovino. Adotou-se o delineamento inteiramente casualizado com seis tratamentos e quatro repetições. As variáveis analisadas foram: diâmetro do caule (DC), altura da planta (AP), taxa de crescimento absoluto das plantas em altura (TCAAP), taxa de crescimento relativo das plantas em altura (TCRAP), taxa de crescimento absoluto do diâmetro do coleto das plantas (TCADC), taxa de crescimento relativo do diâmetro do coleto das plantas (TCRDC), matéria seca da parte aérea (MSPA), matéria seca da raiz (MSR), matéria seca (MST), volume de raiz (VR), MSR/MSPA e MSR/MST. As variáveis, altura de planta, diâmetro do coleto, taxa de crescimento absoluto de diâmetro do coleto e MSR/MST não apresentaram significância estatística em nenhum modelo de regressão polinomial. As variáveis TCAAP TCRAP, TCRDC e MSPA apresentaram ajustamento quadrático. A dose esterco ovina média ótima do experimento foi 25,10 grama saco-1 considerando as variáveis TCAAP, TCRAP, TCRDC e MSPA.
In micropropagation and in vitro conservation various nutrient media have been used for regeneration of citrus rootstocks. In this respect, the present study was conducted to define, among three culture media, one of common use (MS) and two developed for arboreal species (RMAN and WPM), the best formulation for the establishment, propagation and conservation in vitro. Plantlets from 10 citrus rootstocks grown in the three media were micropropagated and conserved in vitro for 18 months, during which they were submitted to three subcultures at six-month intervals. The RMAN and WPM formulations provided the highest seed germination percentages, but the analysis of the morphogenetic response during the subcultures revealed that the composition of RMAN resulted in loss of the regenerative capacity of the explants in the second subculture. As occurred for RMAN, there was reduced development of the plants cultivated in MS with each new subculture. The plants grown in WPM, maintained or increased their regenerative capacity during the subcultures. Among the media studied, WPM was the most efficient for micropropagation and in vitro conservation, while the RMAN limited the in vitro germination of the rootstocks.
The work evaluated the thermal comfort of dairy cows raised in the semiarid region of Itapiúna-CE, during the different periods of the year in the afternoon and morning shifts. Eighteen crossbred cows of two coats of color predominantly black (9) and white (9) were used. The climatic data were collected in their maximum, minimum and average values, of the ambient temperature (AT) and the relative humidity of the air (RH) to calculate the temperature and humidity index (THI). The physiological data collected were respiratory rate (RR) and head surface temperature (HST), neck (NST), thorax (TST), flank (FST) and udder (UST). The study showed that the afternoon shift, both in the dry and in the rainy season, the ambient temperature (AT) values did not differ, evidencing the high temperatures of the Itapiúna semiarid, regardless of the period of the year. Both the white coat and the black coat cows used the mechanism of heat loss by raising the respiratory frequency in the afternoon shift, to maintain their homeothermy. This increase is related to the elevation of THI in the afternoon. Crossbred cows (Holstein X Gir) of white or black coat presented normal physiological and productive parameters for the species, denoting the adaptation of these animals to the semiarid environment of Itapiúna, regardless of the period of the year.
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