Effects of Black and Transparent Polyethylene Mulches and Irrigation Interval on Growth and Yield of Muskmelon

To investigate the effect of polyethylene mulches and irrigation intervals on the qualitative and quantitative characteristics of melon (Cucumis melo var. Inodorus), a split plot experiment based on randomized complete block design with four replications was carried out in Ardestan region in Isfahan Province at 2004. Main plot were consisted of irrigation intervals (6, 9, and 12 day) and sub plots were three mulch covers (transparent, black polyethylene mulches, and bare soil). Results showed that all measured characteristics, except length and fresh weight of plants, were significantly affected by irrigation intervals and soil covers in second stage of measuring (120 days after planting). In mulched plots, yield was decreased when irrigation interval was increased. Mulching caused early germination, increased vegetative growth and yield of the crops. The highest yield (29.66 t ha-1) was obtained in transparent mulch and 6-day irrigation interval regime.