المؤلفون: Luigi Santonicola, Antonietta Napolitano, Francesco Castelluccio, Barbara Greco, Michele De Maio, Mario Farina

المصدر: Italian Journal of Agronomy, Vol 13, Iss 2 (2017)

مصطلحات موضوعية: Natural ventilation greenhouse, combined roof and side openings, insect-proof screen, nitrates, reference crop evapotranspiration., Agriculture, Plant culture, SB1-1110

الوصف: A natural ventilation greenhouse is a patented new greenhouse model that maximises natural ventilation and allows stable installation of an anti-insect proof screen. The effects of the presence or absence of an anti-insect proof screen are compared with various parameters of the soil [moisture, pH, electrical conductivity (EC), nitrates], of the greenhouse environment [irradiance, Hargreaves-Samani reference crop evapotranspiration (ETo)] and of the plants [fresh matter, dry matter, leaf area index (LAI)]. The presence of the insect-proof screen reduces the water requirements of tomato. Indeed, soil moisture, delivered water and ETo are significantly lower compared to the greenhouse without an insect-proof screen. An insect-proof screen also reduces the EC and nitrates in the soil, improves LAI, doubles the amount of fresh matter of plant parts and triples the fresh matter of the productive part with respect to a greenhouse without an anti-insect-proof screen.

وصف الملف: electronic resource

العلاقة: https://www.agronomy.it/index.php/agro/article/view/932Test; https://doaj.org/toc/1125-4718Test; https://doaj.org/toc/2039-6805Test

الوصول الحر: https://doaj.org/article/393118075cd04c25964d1b17b344757cTest

المؤلفون: Antonietta Napolitano, Luigi Santonicola, Mario Farina, Francesco Castelluccio, B. Greco, Michele De Maio

المصدر: Italian Journal of Agronomy, Vol 13, Iss 2 (2017)

مصطلحات موضوعية: insect-proof screen, Moisture, nitrates, 020209 energy, fungi, lcsh:S, Irradiance, Greenhouse, Natural ventilation, 02 engineering and technology, Natural ventilation greenhouse, lcsh:Plant culture, combined roof and side openings, lcsh:Agriculture, Crop evapotranspiration, reference crop evapotranspiration, Agronomy, 0202 electrical engineering, electronic engineering, information engineering, Environmental science, lcsh:SB1-1110, Dry matter, Leaf area index, Agronomy and Crop Science, Water content

الوصف: A natural ventilation greenhouse is a patented new greenhouse model that maximises natural ventilation and allows stable installation of an anti-insect proof screen. The effects of the presence or absence of an anti-insect proof screen are compared with various parameters of the soil [moisture, pH, electrical conductivity (EC), nitrates], of the greenhouse environment [irradiance, Hargreaves-Samani reference crop evapotranspiration (ETo)] and of the plants [fresh matter, dry matter, leaf area index (LAI)]. The presence of the insect-proof screen reduces the water requirements of tomato. Indeed, soil moisture, delivered water and ETo are significantly lower compared to the greenhouse without an insect-proof screen. An insect-proof screen also reduces the EC and nitrates in the soil, improves LAI, doubles the amount of fresh matter of plant parts and triples the fresh matter of the productive part with respect to a greenhouse without an anti-insect-proof screen.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e51d19f48b5a71e09edb105910e59a4Test
https://doi.org/10.4081/ija.2017.932Test

المؤلفون: SINGH, KRISHAN P, MANDHAR, S C

المصدر: The Indian Journal of Agricultural Sciences; Vol. 71 No. 4 (2001) ; 0019-5022

مصطلحات موضوعية: Gerbera jamesonii, gerbera, exotic cultivar, low cost natural ventilation greenhouse, growth, number of flowers, grading of flowers, environmental parameters, temperature, relative humidity

الوصف: The performance of 9 exotic cuitivars of gerbera, viz Diablo, Lyonella, Omelia, Sunset, Tara, Thalassa, Tiramisu, Twiggy and Whitsun was studied under lowcost naturally ventilated greenhouse environment. Cultivar Lyonella recorded maximum height of plant (53.49 cm), spread of plant (72.71 cm) and number of suckers (4.55) and leaves (46.66 ) perplant. Survival percentage of plants up to one year of planting did not differ significantly and varied from 86.11 % in case of cultivar Whitsun and 100 % in case of cultivars Omelia and Twiggy. The earliest (38.22 and 51.13 days) and latest (86.66 and 94.74 days) flowering were observed in cultivars Whitsun and Tiramisu, respectively. The maximum flower diameter (10.44 cm), stalk length (64.00 cm), stalk thickness (0.75 cm diameter) and fresh weight of stalk (23.01 g) were recorded in cultivars Thalassa, Lyonella, Tiramisu and Omelia, respectively. Higher yield (number) of flowers per plot and per plant per year was obtained in Diablo (1 223.33 and 54.67) followed by Lyonella (1 092.33 and 47.76), Omelia (1 073.66 and 46.28) and Thalassa (1 067.00 and 46.26) and the minimum in cultivar Tara (501.66 and 21.60.). The highest 1st grade (96.42%) and lowest lInd grade (3.32%) and IIIrd grade/unmarketable (0.25%) flowers were recorded in cultivar Twiggy, followed by Sunset (94.36%, 5.13% and 0.49% respectively), Tiramisu (92.70%, 6.83% and 0.45% respectively) and Lyonella (92.69%, 6.48% and 0.64% respectively). The lowest 1st grade flowers (79.81%) and the highest unmarketable Dowers (12.51%) were obtained in cultivar Whitsun. The temperature inside the greenhouse varied from 28°C to 36.9°C and the temperature build-up could be controlled from 1.1°C to 3°C. The retative humidity indside the greenhouse varied from 24 to 70% when outside relative humidity varied from 20 to 70%.

وصف الملف: application/pdf

العلاقة: https://epubs.icar.org.in/index.php/IJAgS/article/view/39719/17882Test; https://epubs.icar.org.in/index.php/IJAgS/article/view/39719Test

الإتاحة: https://epubs.icar.org.in/index.php/IJAgS/article/view/39719Test