ISHS Acta Horticulturae 807: International Symposium on Strategies Towards Sustainability of Protected Cultivation in Mild Winter Climate
EFFECT OF BLACK AND WHITE NETS AS ALTERNATIVE COVERS TO SWEET PEPPER PRODUCTION UNDER GREENHOUSES IN EGYPT |
| Authors: | M.A. Medany, M.K. Hassanein, A.A. Farag |
| Keywords: | screenhouses, polyethylene, temperature, relative humidity |
| Abstract:
Two field experiments were conducted at El-Bossaily, north-west coast of the Nile Delta. This study aims at investigating the effect of black and white insect-proof nets as a greenhouse cover, replacing the polyethylene sheets in order to reduce the cost of covering material and to allow start the pepper growing season earlier under greenhouses. Sweet pepper (Capsicum annuum L) cv. Reda F1 seedlings were transplanted during August of both 2006/2007 and 2007/2008 seasons in the greenhouse. Three single greenhouses were used in this experiment, one was covered by black insect-proof nets; another was covered by white insect-proof nets and the third was covered by 200 microns low density polyethylene sheets (control). During the winter season, the two netted greenhouses were covered by 50 micron polyethylene sheets, which were removed on March 1st. The experiment adopted a randomized complete block design with three replicates. The obtained results indicate that black net greenhouse gave significantly the highest early yield, while white net greenhouse gave significantly the highest plant height, number of leaves per plant, leaf area index and total yield compared to the other greenhouses. In the winter season, the highest yield was obtained in the plastic house. The depreciated annual cost of covering nets was estimated to be half the cost of plastic covering. | |
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