Light is a limiting factor of paramount importance for plants since, in addition to providing the radiant energy for photosynthesis, it modulates the growth and development in response to environmental conditions. When operating in protected cultivation the amount and the spectral distribution of solar radiation inside the greenhouse undergo a modification that depends on the type of cover used. UV radiation is considered as a stress factor, which is able to affect the characteristics of plant growth and to trigger a variety of physiological responses that lead to an accumulation of secondary metabolites that increase the plant resistance. Currently, accurate measurements of meteorological parameters in protected cultivation are unavailable, neither are known the measurement uncertainties of environmental parameters that can be resolved in percentage uncertainties on the variability of the product. The research activities concern the quality of table tomatoes harvested in protected cultivation. The following aspects will be evaluated: (i) microclimate and solar radiation measurement of the spectral distribution, using calibrated and traceable instrumentation, within the different cultivation environments; (ii) monitoring of the optical and radiometric properties of the films used as covering material; (iii) identification of the physiological processes of crops in response to the type of plastic film adopted by phenological, morphological and physiological observations. The microclimate conditions will be monitored by sensors for: solar radiation, operating in the spectral range from 290 to 2800 nm; air temperature in the range between -10 and 45 °C with a target uncertainty of 0.3 °C; air relative humidity between 10% and 98% with a target uncertainty of 1.5%; soil moisture, measuring the volumetric water content between 1% and 100%, inside and outside the tunnel with different covering materials. The instruments used will follow calibration procedures defined ad hoc. The expected results are 1- to assess the productivity of the agricultural product as a function of the meteorological parameters measurement uncertainty within the protected cultivation; 2- to assess quality through the chemical characterization of the crop with a focus on classes of compounds with nutraceutical properties (health promoting compounds).
Experimental site for the measurement of meteorological parameters in protected cultivation and variability of a tomato cultivar
Francesca Sanna;Roberto Deboli;
2016
Abstract
Light is a limiting factor of paramount importance for plants since, in addition to providing the radiant energy for photosynthesis, it modulates the growth and development in response to environmental conditions. When operating in protected cultivation the amount and the spectral distribution of solar radiation inside the greenhouse undergo a modification that depends on the type of cover used. UV radiation is considered as a stress factor, which is able to affect the characteristics of plant growth and to trigger a variety of physiological responses that lead to an accumulation of secondary metabolites that increase the plant resistance. Currently, accurate measurements of meteorological parameters in protected cultivation are unavailable, neither are known the measurement uncertainties of environmental parameters that can be resolved in percentage uncertainties on the variability of the product. The research activities concern the quality of table tomatoes harvested in protected cultivation. The following aspects will be evaluated: (i) microclimate and solar radiation measurement of the spectral distribution, using calibrated and traceable instrumentation, within the different cultivation environments; (ii) monitoring of the optical and radiometric properties of the films used as covering material; (iii) identification of the physiological processes of crops in response to the type of plastic film adopted by phenological, morphological and physiological observations. The microclimate conditions will be monitored by sensors for: solar radiation, operating in the spectral range from 290 to 2800 nm; air temperature in the range between -10 and 45 °C with a target uncertainty of 0.3 °C; air relative humidity between 10% and 98% with a target uncertainty of 1.5%; soil moisture, measuring the volumetric water content between 1% and 100%, inside and outside the tunnel with different covering materials. The instruments used will follow calibration procedures defined ad hoc. The expected results are 1- to assess the productivity of the agricultural product as a function of the meteorological parameters measurement uncertainty within the protected cultivation; 2- to assess quality through the chemical characterization of the crop with a focus on classes of compounds with nutraceutical properties (health promoting compounds).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
