Root pruning reduces the vegetative and reproductive growth of apple trees growing under an ultra high density planting system

1998 ◽  
Vol 77 (3-4) ◽  
pp. 165-176 ◽  
Author(s):  
Z.U Khan ◽  
D.L McNeil ◽  
A Samad
Keyword(s):  
High Density ◽  
Root Pruning ◽  
Apple Trees ◽  
Reproductive Growth ◽  
Vegetative And Reproductive Growth ◽  
Planting System

scholarly journals Impact of Repeated Yearly Applications of Prohexadione-Calcium On Vegetative and Reproductive Growth of ‘Golden Delicious’/M.9 Apple Trees

2017 ◽  
Vol 25 (1) ◽  
pp. 47-54 ◽  
Author(s):  
A. Nilgün Atay ◽  
Fatma Koyuncu
Keyword(s):  
Fruit Quality ◽  
Vegetative Growth ◽  
Fruit Set ◽  
Negative Impact ◽  
Apple Trees ◽  
Reproductive Growth ◽  
Node Number ◽  
Golden Delicious ◽  
Vegetative And Reproductive Growth ◽  
Prohexadione Calcium

Abstract Growth retardants have great potential to balance between vegetative and reproductive growth. To assess the effects of prohexadione-calcium (Pro-Ca, Regalis) on reproductive and vegetative growth, return bloom, fruit set, and also fruit quality in ‘Golden Delicious’ apple grafted on M.9 rootstock, an experiment was performed during 2010-2012. The applications of 125 mg dm-3 Pro-Ca on the same trees in each year resulted in a 40-43% shoot length reducing. Internodes length decreased with Pro-Ca at about 30%, while total node number was unaffected. Results indicate that Pro-Ca applications have no effects on tree trunk growth, flowering, yield, fruit set and development. Pro-Ca also didn’t have any negative impact on fruit quality during the three consecutive years. Moreover, Pro-Ca resulted in higher fruit size compared to control in the third year of trial. The results of this experiment clearly suggest that fruit growers can use Pro- Ca for the control of vegetative growth without having any negative effects on fruit quality and yield parameters. Once a full canopy has been achieved, annual shoot growth can be suppressed in the range of 20 to 30 cm with 125 mg dm-3 Pro-Ca treatment in ‘Golden Delicious’ apple trees.

scholarly journals Yield-density relations for apple trees on a dwarfing and a semi-dwarfing rootstock.

1972 ◽  
Vol 20 (1) ◽  
pp. 58-66
Author(s):  
E.W.M. Verheij ◽  
F.L.J.A.W. Verwer
Keyword(s):  
Fruit Size ◽  
Growth Control ◽  
High Density ◽  
Low Density ◽  
Apple Trees ◽  
Fruit Thinning ◽  
Golden Delicious ◽  
Tree Thinning ◽  
Tree Vigour ◽  
Planting System

In a planting system trial started in 1962 Golden Delicious trees in low-density plots at 1 100 trees/ha on M.9 and 660 trees/ha on M.2 came into bearing slowly and yields levelled off at about 40 tons/ha. In high-density plots at 3 300 and 2 260 trees/ha on M.9 and M.2, respectively, yields quickly increased to about 75 tons/ha in 1967 and 1968, but thereafter declined; this was associated with more intensive pruning and fruit thinning to restore tree vigour and fruit quality. Yield per unit of growth was initially higher but finally much lower in high-density plots, indicating that fruiting suffered more than growth from competition between trees. Yield per unit of growth was much higher on M.9 than on M.2, especially at high density. Fruit size was slightly better on M.9, and at high density the problems in maintaining fruit size were not as serious as on M.2. Growth control in the high-density M.2 plot became difficult and tree thinning may be advisable. Under the conditions of the trial the optimum density for Golden Delicious on M.9 is probably above 3 000 trees/ha and on M.2 below 2 000 trees/ha. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Planting Method and Irrigation Rate Influence Vegetative and Reproductive Growth of Peach Planted at High Density

1990 ◽  
Vol 115 (2) ◽  
pp. 207-212 ◽  
Author(s):  
J.G. Williamson ◽  
D.C. Coston
Keyword(s):  
Vegetative Growth ◽  
Fruit Size ◽  
High Density ◽  
Flower Bud ◽  
Reproductive Growth ◽  
Yield Efficiency ◽  
Irrigation Rate ◽  
Growing Seasons ◽  
Planting Method ◽  
Vegetative And Reproductive Growth

Several planting treatments modified vegetative and reproductive growth of young, own-rooted peach (Prums persica) trees evaluated at two levels of irrigation in a high-density orchard (5000 trees/ha). Trees planted in auger holes, narrow herbicide strips, and in fabric-lined trenches, but not those from raised beds, were smaller than control trees set in holes dug with a shovel. After two growing seasons, trees planted in the fabric-lined trenches were smaller and had more flowers per node and greater flower bud densities than trees in other planting treatments. Yield efficiency was greatest for this treatment, although fruit size was small throughout the orchard. Irrigation rates did not affect fruit yield or size. The effects of irrigation rate on vegetative growth were small compared to differences among planting treatments.

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