How Could Precision Irrigation Based on Daily Trunk Growth Improve Super High-Density Olive Orchard Irrigation Efficiency?

被引:8
|
作者
Arbizu-Milagro, Julia [1 ]
Castillo-Ruiz, Francisco J. [1 ]
Tascon, Alberto [1 ]
Pena, Jose M. [1 ]
机构
[1] Univ La Rioja, Fac Sci & Technol, Res Grp Technol Engn & Food Safety, C Madre Dios 53, Logrono 26006, La Rioja, Spain
来源
AGRONOMY-BASEL | 2022年 / 12卷 / 04期
关键词
regulated deficit irrigation; continuous deficit irrigation; dendrometer; water productivity; water use efficiency and olive oil production components; REGULATED DEFICIT IRRIGATION; OLEA-EUROPAEA L; YIELD RESPONSES; TREES; OIL; ARBEQUINA; WATER; FRANTOIO; STRESS;
D O I
10.3390/agronomy12040756
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Water deficit, especially during summer, is currently one of the most important stress factors that influence olive oil production in olive orchards. A precision irrigation strategy, based on daily trunk growth, was assessed and compared with one continuous deficit, one full irrigation, and two different regulated deficit irrigation strategies. All of them were tested in a super high-density olive orchard located in northeast Spain, in which oil production, main oil production components, applied irrigation water, and water productivity were assessed. For this purpose, the crop was monitored from budding to harvesting, mainly during the summer months in which the Precision strategy only applied water after two days of negative daily trunk growth. Maximum monthly water savings for the Precision strategy reached 91.8%, compared with full irrigation, while major annual mean water savings reached 50% for the continuous deficit strategy and 31.2% for the Precision strategy, which also reduced irrigation events by up to 19.7%, compared with the full irrigation strategy. Oil production and oil production components varied depending on the irrigation strategies providing the Control, one of the regulated deficit irrigations, and Precision higher values than the other strategies; oil yield results differ, nonetheless. The Precision strategy showed an overall better performance. Despite this, it did not achieve the highest water saving, it achieved higher water productivity.
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页数:13
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