Effects of irrigation frequency on grain corn yield under drip-tape irrigation method in Jiroft region
2010
Esfandyari, Samad, Jiroft and Kahnouj Agricultural Research Center | Ghaffarinejad, Seyed Ali | Saei, Mahdiyh
This research was conducted to determine optimum irrigation requirement of corn. In this experiment effects of different irrigation levels and frequencies on corn yield were studied. The design of experiment was strip plots in based on RCBD during 3 Years. This investigation had 8 treatments. The factors were 2 irrigation levels, 75 and 100 percentage of plant water requirement, and 4 irrigation frequenciy levels, 1- Daily irrigation, 2-Every two day irrigation, 3-Every three day irrigation in 3 replications. Plant water requirement was calculated by FAO _ Penman _ monteith method. In this research some parameters such as: biologic and grain yield, water use efficiency, plant height, weight of 1000 grains, maize diameter and length, were measured and then were analyzed with MSTAT C soft-ware and Duncan's multiples rang test. Results showed that the best irrigation frequency and level were every three day irrigation and 75 % of plant water requirement. Comparison of means showed that there were maximum and minimum water use efficiency in irrigation levels(with 75 % and 100 % of corn plant water requirement) respectively. Combinated analysis of 3 years showed similar results. Therefor irrigation treatment(75 % of plant water requirement with irrigation frequency of every three days) was suggested to farmers in Jiroft region. Economic analysis showed that irrigation treatment(100 % of plant water requirement with irrigation frequency of every three days ) was the best treatment in three years.
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