ดีจ้า
We compared two water-saving irrigation practices, deficit irrigation (DI) and partial rootzone drying (PRD), for their effects on growth and quality of ‘Ancho St. Luis’ hot pepper (Capsicum annum L.). The treatments were: commercial irrigation (CI) considered as the control, irrigating both sides of the rootzone with half of the volume of CI considered as DI, and alternating irrigation between two sides of the rootzone with half the volume of CI at each irrigation time considered as PRD. Midday leaf water potentials of PRD and DI plants were lower by 0.15 and 0.30 MPa, respectively, than of CI plants from 130days after sowing. Total fresh mass offruit was reduced by19 and 34.7% in PRD and DI, respectively, compared to CI. Fruit number per plant was reduced by more than20% inPRDand DIcomparedto CI.Totaldry mass offruitwassimilaramong thetreatments.At harvest,DIfruithad21%highertotalsolublesolidsconcentrationandbettercolour developmentthan other treatments. Although incidence of blossom-end rot was high in PRD and DI fruit, more than 80% of fruit from PRD was not affected. DI and PRD saved 170 and 164 l of water, respectively, compared to CI and they could be feasible irrigation strategies for hot pepper production where the benefit from saving water outweighs the decrease in total fresh mass of fruit. # 2004 Elsevier B.V. All rights reserved.
ดีจ้าWe compared two water-saving irrigation practices, deficit irrigation (DI) and partial rootzone drying (PRD), for their effects on growth and quality of ‘Ancho St. Luis’ hot pepper (Capsicum annum L.). The treatments were: commercial irrigation (CI) considered as the control, irrigating both sides of the rootzone with half of the volume of CI considered as DI, and alternating irrigation between two sides of the rootzone with half the volume of CI at each irrigation time considered as PRD. Midday leaf water potentials of PRD and DI plants were lower by 0.15 and 0.30 MPa, respectively, than of CI plants from 130days after sowing. Total fresh mass offruit was reduced by19 and 34.7% in PRD and DI, respectively, compared to CI. Fruit number per plant was reduced by more than20% inPRDand DIcomparedto CI.Totaldry mass offruitwassimilaramong thetreatments.At harvest,DIfruithad21%highertotalsolublesolidsconcentrationandbettercolour developmentthan other treatments. Although incidence of blossom-end rot was high in PRD and DI fruit, more than 80% of fruit from PRD was not affected. DI and PRD saved 170 and 164 l of water, respectively, compared to CI and they could be feasible irrigation strategies for hot pepper production where the benefit from saving water outweighs the decrease in total fresh mass of fruit. # 2004 Elsevier B.V. All rights reserved.
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