Microclimate on rice cultivation of local varieties (Oryza sativa L.) by intermittent irrigation

Abstract

This study examines the influence of local varieties and identifies the effects of water-saving intermittent irrigation on microclimate change. This study was compiled using a 3x2 factorial experiment design with a Complete Group Randomized Design. The local rice varieties factor consists of 3 levels: varieties Rojolele, Pandan Wangi, and Mentik Wangi. Factor 2 kinds of irrigation consist of 2 levels, namely: conventional irrigation and intermittent irrigation. The results showed various local rice varieties and types of irrigation no interaction or no mutually affecting relationship to the microclimate change. The air temperature is 29.98 – 36.16°C, while the ground surface temperature is 29.00 – 34.22°C. The surface temperature of the soil and a depth of 25 cm in the maximum vegetative growth phase and at the time of seed formation with intermittent irrigation is higher than conventional irrigation. Pandan Wangi Rice Varieties produce higher grain, although the three local rice varieties do not significantly influence the microclimate change, namely air temperature, humidity, soil temperature, and intensity of sunlight. There is no interaction between local varieties of rice and irrigation types to the microclimate of local rice crops. The type of irrigation does not affect the microclimate. Pandan Wangi can intermittently save more water consumption in local rice cultivation varieties and not cause microclimate change.