Evaluation of different levels of subsurface irrigation on yield and morphological traits of sweet corn

Document Type : Research Paper


1 Ph.D. Student in Water Engineering (Irrigation and Drainage), Department of Water Engineering, Faculty of Agriculture, Urmia University, Urmia, Iran.

2 Professor, Department of Water Engineering, Faculty of Agriculture, Urmia University, Urmia, Iran.

3 Assistant Professor, Department of Water Engineering, Faculty of Agriculture, Bu Ali Sina University, Hamadan, Iran.

4 Graduate Ph.D. in Water Engineering, Department of Water Engineering, Faculty of Agriculture, Urmia University, Urmia, Iran.


Planning for the best use of water resources in agriculture is inevitable. In this regard, the method of subsurface drip irrigation can, in addition to reducing the amount of irrigation water, increase crop yield. This study was conducted to investigate the different levels of under-irrigation and over-irrigation on yield indices and plant traits of sweet corn cultivar CHASE, under subsurface drip irrigation system in a randomized complete block design with four treatments of 20 Percent over-irrigation, equal to water requirement, 20 and 40 Percent under-irrigation in four Repeated. The results showed that in general, the effects of under-irrigation and over-irrigation on cob yield, 1000-seed weight, uncovered cob diameter, pod-free cob length, number of cob rows and number of seeds were significant. Also, based on the results, it can be stated that by reducing the amount of water consumption, the yield of the product decreases linearly. The highest and lowest cob yields were obtained in over-irrigation treatments and 60 Percent of water requirement with an average of 30.4 and 19.9 tons per hectare, respectively. Accordingly, with a 20 Percent reduction in water consumption compared to full irrigation, only 4.72 Percent of the crop is significantly reduced. This is while with a 20 Percent increase in irrigation water, the yield of cob increases by 10.54 Percent. 1000-seed weight in full irrigation and 20 Percent low irrigation treatments was 375.7 and 372.6 g, respectively. There was no significant difference between over-irrigation and 20 Percent under-irrigation treatment. There was a significant difference between the means of ear yield indices, length and number of seeds per ear row in all irrigation treatments.


Main Subjects

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