SOIL TEMPERATURE MODIFICATIONS CAUSED BY SOLARIZATION IN NURSERIES

Ciência Rural

Nereu Augusto Streck²  Flavio Miguel Schneider¹  Galileo Adeli Buriol¹ 

[1] ,Universidade Federal de Santa Maria Centro de Ciências Rurais Santa Maria RS ,Brazil

关键词: solarization;    soil temperature;    nurseries;    low tunnels;    solarização;    temperatura do solo;    canteiros;    túneis baixos;   

DOI  :  10.1590/S0103-84781993000300027

来源: SciELO

【 摘 要 】

Solarization effects on soil temperature were evaluated during the autumn. The increase in soil temperature caused by the use of transparent polyethylene (PE) low tunnels over solarized nurseries, in subtropical central region of the Rio Grande do Sul state, Brazil, was also quantified. Treatments were: a) solarization with 100µ thickness PE (T1), b) solarization with 100µ thickness PE, covered with low tunnel (T2), c) solarization with 50µ thickness PE (T3), d) solarization with 50µ thickness PE, covered with low tunnel (T4), and e) bare soil (T). The low tunnel consisted of a 100µ thickness PE and measured 0.5m height in the center of the nursery. The results showed that additional use of low tunnels have increased, on the average, 5.0ºC over the maximum temperature of the superficial layer of the soil in the solarized nurseries. In addition, it was observed several days in which the maximum temperature exceeded 45ºC.

【 授权许可】

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