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Effects of irrigation deprivation during the harvest period on yield determinants in mature almond trees
Year:
2001
Source of publication :
tree physiology (source)
Authors :
Klein, Isaac
;
.
Volume :
21
Co-Authors:
Esparza, G., Department of Pomology, University of California, Davis, CA 95616, United States
DeJong, T.M., Department of Pomology, University of California, Davis, CA 95616, United States
Weinbaum, S.A., Department of Pomology, University of California, Davis, CA 95616, United States
Klein, I., Department of Pomology, University of California, Davis, CA 95616, United States
Facilitators :
From page:
1073
To page:
1079
(
Total pages:
7
)
Abstract:
Effects of irrigation deprivation during the harvest period on yield determinants in mature almond (Prunus dulcis (Mill.) D.A. Webb cv. Nonpareil) trees were investigated during a 3-year field experiment. Return bloom and fruit set were measured on 2185 individually tagged spurs. Water stress resulting from irrigation deprivation during the harvest period, which purportedly coincides with the time of flower initiation, had no effect on the percentage of spurs that flowered or set fruit during subsequent years. Although water stress had no apparent effect on spur mortality, 66% of the tagged spurs died within 3 years. In addition, many spurs were vegetative by the third year, indicating the importance of spur renewal for sustained fruit production. Reductions in nut yield were evident after two successive years of irrigation deprivation during the harvest period. Regression analysis indicated a loss in yield of 7.7 kg tree-1 in response to each 1 MPa decrease in stem water potential below -1.2 MPa during the previous seasons. The number of fruiting positions per tree (estimated indirectly for whole trees based on weight of current-year shoots > 5 cm in length) was negatively associated with water stress. Yield reduction in response to water stress during harvest appears to be a compound, multiyear effect, associated with reduced annual growth and renewal of fruiting positions.
Note:
Related Files :
Agriculture
article
California
crop yield
drought stress
harvesting
Prunus
Prunus dulcis
United States
water
water stress
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More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30145
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:52
Scientific Publication
Effects of irrigation deprivation during the harvest period on yield determinants in mature almond trees
21
Esparza, G., Department of Pomology, University of California, Davis, CA 95616, United States
DeJong, T.M., Department of Pomology, University of California, Davis, CA 95616, United States
Weinbaum, S.A., Department of Pomology, University of California, Davis, CA 95616, United States
Klein, I., Department of Pomology, University of California, Davis, CA 95616, United States
Effects of irrigation deprivation during the harvest period on yield determinants in mature almond trees
Effects of irrigation deprivation during the harvest period on yield determinants in mature almond (Prunus dulcis (Mill.) D.A. Webb cv. Nonpareil) trees were investigated during a 3-year field experiment. Return bloom and fruit set were measured on 2185 individually tagged spurs. Water stress resulting from irrigation deprivation during the harvest period, which purportedly coincides with the time of flower initiation, had no effect on the percentage of spurs that flowered or set fruit during subsequent years. Although water stress had no apparent effect on spur mortality, 66% of the tagged spurs died within 3 years. In addition, many spurs were vegetative by the third year, indicating the importance of spur renewal for sustained fruit production. Reductions in nut yield were evident after two successive years of irrigation deprivation during the harvest period. Regression analysis indicated a loss in yield of 7.7 kg tree-1 in response to each 1 MPa decrease in stem water potential below -1.2 MPa during the previous seasons. The number of fruiting positions per tree (estimated indirectly for whole trees based on weight of current-year shoots > 5 cm in length) was negatively associated with water stress. Yield reduction in response to water stress during harvest appears to be a compound, multiyear effect, associated with reduced annual growth and renewal of fruiting positions.
Scientific Publication
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