STUDY OF EFFECT OF ALTERNATE FURROW IRRIGATION IN SUGARCANE (VAR CP69-1062) AT DIFFERENT GROWTH STAGES ON QUALITY AND QUANTITY OF YIELD

摘要

Sugarcane is one of the important crops in Khuzestan province. It consumes largernamount of water, specially in the warm season. In this study in order to optimize waterrnconsumption by sugarcane, five treatments with three replications using randomizedrncomplete block design were applied in Karun Agro Industry, Inc. The 1st treatment wasrnconventional irrigation; the 2nd was alternate furrow irrigation during the growth season andrnthe 3rd, 4th and 5th treatments were irrigation in alternate furrow for a part of the growingrnseason, followed by conventional irrigation for the remaining part. These treatments werernsequentially included with the alternate furrow irrigation method, at the beginning of therngrowing season, during the mid-stage growing season and finally at the late stage ofrngrowing season. The results indicated that there were no significant differences among therntreatments, but the 3rd treatment showed an increase of 8.02 tons/ha of sugarcane andrn2.08 tons/ha sugar more than the conventional irrigation. In terms of per cent of recoveryrnsugar, 3rd, 4th and 5th treatments showed about 5% better performance in comparisonrnwith the conventional method. The results also, indicated that water use efficiencies ofrn1st and 2nd treatments were 0.51 kg/m~3 and 0.38 kg/m~3, respectively. Therefore, it can bernconcluded that the alternate furrow irrigation system in general can increase cane yieldrnand water productivity.