Effects of Different Ridge and Furrow Rainwater Harvesting Methods on Water Consumption Intensity and Yield of Dry-land Oat
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Abstract:
Ridge and furrow with cover rainwater harvesting technology has been widely used in the semi-arid agricultural region in the northwest of China due to its significant raising yield with saving water in the arid agricultural areas. In order to study ridge and furrow rainwater harvesting method suitable for oats, to analyze water consumption of oat, and to propose an appropriate model of ridge and furrow rainwater harvesting, this study designed four types of treatments, including T1 of ground planting, T2 of ditch ridge planting without cover and without water supply, T3 of ditch ridge planting with cover but without water supply, and T4 of ground planting with sufficient water supply. The results showed that: (1) the water consumption of T1 treatment was higher than that of T2 and T3 treatments during the main growth stage, except for T4 treatment; (2) T3 treatment significantly increased the soil moisture in the 0-30 cm profile of the arable layer and it reached 6.93 mm, while T1 treatment had the highest water consumption in each soil section among all the treatments; (3) the highest yield was 1854 kg/hm2 by T4 treatment, and was 1611.2 kg/hm2 by T3. So the highest yield by T4 was 242.8 kg/hm2 higher than that by T3 treatment. For the planting methods without water supply (T1, T2 and T3 treatment), the highest yield by T3 treatment was about 28.1% and 27.8% higher than that by T1 and T2 treatments, respectively; and (4) T4 treatment had the highest yield for all components among all the treatments, and T3 treatment significantly reduced the 1000-grain weight of oats to only 13.9 g, but the other indicators in T3 treatment were significantly higher those in T1 treatment.
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