Response of field corn cultivars after rice to irrigation frequency and mulching
1998
Somchai Boonpradub | Wanchai Thanomsub | Montri Chatasiri (Department of Agriculture, Bangkok (Thailand). Phitsanulok Field Crops Experiment Station)
Productivity of corn grown after rice is often limited by water management due to less suitable amount and frequency of water applied and mulching methods. Field studies were conducted on sandy loam in the farm of Phitsanulok Field Crops Experiment Station during 1996 and 1997 in dry season (December-April). The objectives of this study were to determine the effect of the irrigation frequency and mulching methods on growth and grain yield of corn cultivars differing in maturity cultivar produced approximately 15-80 percent higher grain yield than NST 89-101 as an early maturity cultivar. While the yield of maize grown under straw mulching was 77-120 percent greater than no-mulching treatment. The interaction between cultivars and mulching methods in yield was significant. The average grain yield decreased by 15, 24 and 28 percent with decreasing irrigation frequency from 7-days interval to 14, 21 and 28-days interval, respectively. In contract decreasing irrigation frequency increased total water use of 44, 54 and 62 percent, respectively. Plant height, yield components, total dry matter, leaf area index, anthesis interval index and water use efficiency were affected by irrigation frequency, mulching methods and corn cultivars, however, their interactions were not significant.
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