Regulated Deficit Irrigation as a Water-Saving Strategy for Onion Cultivation in Mediterranean Conditions

被引:18
|
作者
Abdelkhalik, Abdelsattar [1 ,2 ]
Pascual, Bernardo [1 ,3 ]
Najera, Inmaculada [4 ]
Baixauli, Carlos [4 ]
Pascual-Seva, Nuria [1 ,3 ]
机构
[1] Univ Politecn Valencia, Dept Prod Vegetal, Cami Vera S-N, E-46022 Valencia, Spain
[2] Fayoum Univ, Fac Agr, Hort Dept, Al Fayyum 63514, Egypt
[3] Univ Politecn Valencia, Ctr Valenciano Estudios Riego, Cami Vera S-N, E-46022 Valencia, Spain
[4] Ctr Experiencias Cajamar Paiporta, Camino Cementerio Nuevo S-N, Valencia 46200, Spain
来源
AGRONOMY-BASEL | 2019年 / 9卷 / 09期
关键词
irrigation water requirements; irrigation water applied; irrigation water use efficiency; volumetric soil water content; relative water content; membrane stability index; plant growth; bulb yield; yield response factor; gross revenue; ALLIUM-CEPA-L; VAR. SATIVUS BOECK; USE EFFICIENCY; SAVE WATER; YIELD; CROP; QUALITY; MANAGEMENT; GROWTH; PRODUCTIVITY;
D O I
10.3390/agronomy9090521
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Field experiments were performed for two growing seasons in Spain under Mediterranean conditions to evaluate the response of onion growth, plant water status, bulb yield, irrigation water use efficiency (IWUE), and gross revenue to regulated deficit irrigation strategies (RDI). Seven irrigation treatments were utilized, including the application of 100% irrigation water requirements (IWR) during the entire growing season and the application of 75% or 50% of the IWR during one of the following growth stages: the vegetative growth, bulbing, and bulb ripening stages. The deficit irrigation strategies tested decreased marketable yields to greater or lesser extents; therefore, if water is readily available, full irrigation would be recommended. The RDI with 50% of the IWR during the bulb ripening stage led to important water savings (22%) and to slight decreases in yield (9%), improving IWUE (20%) compared with full irrigation, and this strategy can be recommended under a severe water shortage. A satisfactory bulb yield was obtained with RDI with 75% of the IWR during the bulb ripening stages, resulting in a lower reduction in yield (4%) and in an increased IWUE (9%); this strategy is an advisable strategy for onion production under a mild water shortage in Mediterranean conditions.
引用
收藏
页数:19
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