A comparison of the combined effect of water stress and crop load on fruit growth during different phenological stages in young peach trees.

2004 ◽  
Vol 79 (2) ◽  
pp. 308-315 ◽  
Author(s):  
J Girona ◽  
J Marsal ◽  
A Arbones ◽  
T. M. Dejong
2001 ◽  
Vol 91 (3-4) ◽  
pp. 289-303 ◽  
Author(s):  
J Besset ◽  
M Génard ◽  
T Girard ◽  
V Serra ◽  
C Bussi

2017 ◽  
Vol 15 (2) ◽  
pp. e0803 ◽  
Author(s):  
Isabel Abrisqueta ◽  
Wenceslao Conejero ◽  
Lidia López-Martínez ◽  
Juan Vera ◽  
M. Carmen Ruiz Sánchez

 The objectives of the paper were to study the pattern of root growth (measured by minirhizotrons) in relation to trunk, fruit and shoot growth and the effects of crop load on tree growth and yield in peach trees. Two crop load (commercial and low) treatments were applied in a mature early-maturing peach tree orchard growing in Mediterranean conditions. Root growth dynamics were measured using minirhizotrons during one growing season. Shoot, trunk and fruit growth were also measured. At harvest, all fruits were weighed, counted and sized. Roots grew throughout the year but at lower rates during the active fruit growth phase. Root growth was asynchronous with shoot growth, while root and trunk growth rates were highest after harvest, when the canopy was big enough to allocate the photo-assimilates to organs that would ensure the following season’s yield. Shoot and fruit growth was greater in the low crop load treatment and was accompanied by a non-significant increase in root growth. High level of fruit thinning decreased the current yield but the fruits were more marketable because of their greater size.


Fruits ◽  
2005 ◽  
Vol 60 (1) ◽  
pp. 55-68 ◽  
Author(s):  
Ahmed Mahhou ◽  
Theodore M. DeJong ◽  
Tiesen Cao ◽  
Ken S. Shackel

Author(s):  
G. N. Nwokwu ◽  
L. G. Ekwu ◽  
E. B. Utobo

Field experiments were carried out at Faculty of Agriculture and Natural Resource Management, Ebonyi State University, Abakaliki in 2011 and 2012 dry seasons to study the effect of water stress at different phenological stages of muskmelon. Results revealed that watering intervals of every six days significantly influenced number of leaves, number of branches and days to 50% flowering.During flowering phase, the plots that were watered in every six and nine days flowered late while early flowering were recorded by plots that were watered once a day and every three days. The higest yield of muskmelon was observed in irrigation intervals of six days.Also watering frequency of six days intervals had maximum net income, closely followed by nine days intervals. It can be inferred that watering frequency of every six days intervals significantly affected both growth and yield characters of the crop studied at different phenological stages and it could be recommended for growing the crop in the study area.


HortScience ◽  
2006 ◽  
Vol 41 (5) ◽  
pp. 1253-1258 ◽  
Author(s):  
Elina D. Coneva ◽  
John A. Cline

The purpose of this research was to determine the effectiveness of three blossom-thinning compounds on crop density and fruit quality of two peach cultivars. Treatments consisted of 15 ml·L–1 and 30 ml·L–1 ammonium thiosulphate, 30 ml·L–1 and 40 ml·L–1 decyl alcohol, and 40 ml·L–1 lime sulfur. Treatments were applied to `Redhaven' and `Harrow Diamond' peach trees at two phenological stages: 80%, and 100% full bloom in 2002 and 2003. In both years, treatments reduced the crop density in both cultivars, and in 2003 the amount of hand thinning required to adjust the crop load was significantly reduced. Fruit size from several blossom-thinned treatments was comparable with that observed from hand-thinned trees. However, treatments caused significant leaf phytotoxicity to `Harrow Diamond' trees in 2003, likely a result of hand spray gun applications. These data indicate that chemical sprays at bloom can be used successfully to reduce fruit set, but are very environmentally, dose, and cultivar dependent.


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