| Growth dry mass and yield response of cotton under partial rootzone irrigation in arid area |
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| DOI：10.7606/j.issn.1000-7601.2008.03.42 |
| Key Words: partial rootzone irrigation cotton dry mass yield |
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| Abstract: |
| To investigate whether partial rootzone irrigation could save water and maintain economic yield a field experiment on cotton under arid conditions was designed．Three treatments were applied as：alternative furrow irrigation （AFI） fixed furrow irrigation （FFI） and conventional furrow irrigation （CFI）．The results showed that when the amount of irrigation was reduced by 30％ PRI （AFI and FFI） produced comparable numbers of opened bolls and yields of seed cotton．The seed cotton yields of AFI and FFI were92％ and84％ of that of CFI respectively．The seed cotton yield before frost of AFI was12％ higher than that of CFI．PRI developed less leaf area shorter plants and less dry mass of leaf boll and stem than CFI but the boll numbers per plant were not significantly different．The conclusion was that AFI could maintain comparable amount of seed cotton and maintain economic yield under less irrigation water. |