Portal de Pesquisa da BVS Veterinária

B. Indústr. Anim.; 34(1): 149-153, 1977.

Artigo em Português | VETINDEX | ID: vti-467347

Resumo

The present work was carried out in the Posto Experimental de Limeira, State of São Paulo. The objective was to verify the temperature and relative humidity variations in the room of silkworm rearing during the hours of the day, when the larvae remain more active and when the influence of these climatic factors is higher. The temperature and humidity data were obtained in the silkworm rearing room, from the termometre and higrometre, up in middle of the room at the height of 1.50m, The observation of the temperature and humidity was carried out hour per hour from seven oclock A.M. to six oclock P.M., all days of the months of October, November, December and January of the sericultural year 1975/76. The analysis of the results showed that: 1) the temperature and humidity variations were great during the studied period; 2) The highest temperature was observed between 01:53P.M. and 2:53P.M.; 3) The lowest humidity was obtained in the same period between 3:51P.M. and 4:54P.M.; 4) The critic period to the silkworm rearing with the maximum of temperature and minimum of relative humidity was verified between 1:53 P.M. and 4:54 P.M.; 5) The inflexion points of the temperature and relative humidity curves demonstrated high and inverse correspondence avoided to observe that the highest temperature corresponded to a little antecipation to the lowest relative humidity percentages.

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O presente experimento, conduzido no Posto Experimental de Limeira (SP), teve por objetivo verificar a influência das variações da temperatura e da umidade relativa do ar em ambiente de criação do bicho-da-seda, no decorrer das horas do dia nas quais as larvas permanecem mais ativas. Os dados de temperatura e umidade relativa do ar foram obtidos em sirgaria destinada à criação do bicho-da-seda, através de um termômetro de máximas e mínimas e um higrômetro colocados no centro do ambiente a 1,50m de altura. De hora em hora, das 7 às 18 horas, diariamente, de outubro a janeiro, efetuaram-se as leituras de temperatura e umidade. As equações que representam as mudanças de temperatura e umidade nesse período foram as seguintes: outubro: t = = 20,1201 + 1,88487X 0,1 10240X2 e u = 85,8910 0,24040X 0,784604X2 + 0,0486661X3 novembro: t = 18,0091 + 1,76374X 0,099201X2 e = 90,6178 + 1,33793X 0,92l312X2 + 0,0534002X3 dezembro: t = 18,4432 + 2,31451X 0,144231X2 e t = 91,2412 0,63102X _0,789782X2 + 0,0555815X3 janeiro: t = 17,7932 + 2,53434X 0,160764X2 e u 85,6467 + 3,12648X 1,299578X2 + 0,0769360X3. t e u representam, respectivamente, as estimativas de temperatura e umidade relativa do ambiente de sirgaria, e a variável independente X é o número de horas do dia. A análise dos resultados permitiu concluir que: 1) As variações da temperatura e da umidade relat

Biblioteca responsável: BR68.1