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Effects of partial rootzone drying on the Growth of Vitis vinifera *** Grafted on Different Rootstocks

Agricultural Sciences in China 2007年第5期6卷 567-572页

作者： QI Wei GUAN Xue-qiang LI En-mao ZHAI Heng WANG Xiao-fang DU Yuan-peng College of Horticulture Science and Engineering Shandong Agricultural University Taian 271018 P.R.China State Key Laboratory of Crop Biology Shandong Agricultural University Taian 271018 P.R.China College of Horticulture Xinjiang Agricultural University Urumchi 830052 P.R.China

To lay a biological foundation for rootstocks and alternate irrigation （AI） popularization, the effects of partial rootzone drying （PRD） on the growth of the grapevine Malvasia grafted on different rootstocks were investigated. Biological effects of 1/2 divided root irrigation on three combinations, i.e., Malvasia/420A, Malvasia/3309C, and Malvasia/110R, were studied by wood-boxed plants. All the plants were separated into three groups for different irrigation strategies. Mass growth of new root in alternate-irrigated plants was remarkably promoted by about 7.8-22.2% higher than the well- watered ones. However, new shoot growth, especially the internode was reduced by alternate irrigation. The average root-shoot ratio of all the three combinations was increased from 1.1 to 1.46. New root growth and internode length were decreased by fixed partial rootzone irrigation （FI） at different amount, M/3309C at 37.9 and 36.9%, M/110R at 18.4 and 22.5%, respectively. Total biomass of all the three combinations under FI decreased at the rate of 19.2-34.3% compared with well-watered ones. Water stress adaptation of grapevine mainly depends on rootstock. 110R is more efficient than 3309C and 420A in water stress adaptation. PRD-AI benefited root growth, thus improved the drought-resistant ability of grapevine.

关键词： grapevine (Vitis vinifera) rootstock partial rootzone drying growth

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Deficit Irrigation as a Strategy to Save Water:Physiology and Potential Application to Horticulture

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Journal of Integrative Plant Biology 2007年第10期49卷 1421-1434页

作者： J.Miguel Costa Maria F.Ortuo M.Manuela Chaves InstitutoSuperior de Agronomia Universidade Técnica de LisboaTapada da Ajuda1349-017 LisboaPortugal Laboratório de Ecofisiologia MolecularInstituto de Tecnologia Química e BiológicaApartado 1272780-901 OeirasPortugal Instituto

Water is an increasingly scarce resource worldwide and irrigated agriculture remains one of the largest and most inefficient users of this resource. Low water use efficiency （WUE） together with an increased competition for water resources with other sectors （e.g. tourism or industry） are forcing growers to adopt new irrigation and cultivation practices that use water more judiciously. In areas with dry and hot climates, drip irrigation and protected cultivation have improved WUE mainly by reducing runoff and evapotranspiration losses. However, complementary approaches are still needed to increase WUE in irrigated agriculture. Deficit irrigation strategies like regulated deficit irrigation or partial root drying have emerged as potential ways to increase water savings in agriculture by allowing crops to withstand mild water stress with no or only marginal decreases of yield and quality. Grapevine and several fruit tree crops seem to be well adapted to deficit irrigation, but other crops like vegetables tend not to cope so well due to losses in yield and quality. This paper aims at providing an overview of the physiological basis of deficit irrigation strategies and their potential for horticulture by describing the major consequences of their use to vegetative growth, yield and quality of different crops （fruits, vegetables and ornamentals）.

关键词： deficit irrigation horticulture partial rootzone drying regulated deficit irrigation water saving.

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