scholarly journals Influence of Rootstock on Citrus Tree Growth: Effects on Photosynthesis and Carbohydrate Distribution, Plant Size, Yield, Fruit Quality, and Dwarfing Genotypes

Plant Growth ◽  
10.5772/64825 ◽  
2016 ◽  
Author(s):  
Mary-Rus Martínez-Cuenca ◽  
Amparo Primo-Capella ◽  
Maria Angeles Forner-Giner
Keyword(s):  
Fruit Quality ◽  
Tree Growth ◽  
Plant Size ◽  
Citrus Tree ◽  
Growth Effects

Effects of cooling measures on ‘Nijisseiki’ pear ( Pyrus pyrifolia ) tree growth and fruit quality in the hot climate

2018 ◽  
Vol 238 ◽  
pp. 318-324 ◽  
Author(s):  
Yi Feng ◽  
Jun Wei ◽  
Guifen Zhang ◽  
Xiaoyan Sun ◽  
Wei Wang ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Tree Growth ◽  
Pyrus Pyrifolia ◽  
Hot Climate

Influence of rootstocks on Navel orange yield and tree growth at Mildura, Victoria

1972 ◽  
Vol 12 (55) ◽  
pp. 203 ◽  
Author(s):  
LM Stafford
Keyword(s):  
Fruit Quality ◽  
Tree Growth ◽  
Soil Type ◽  
Sweet Orange ◽  
Tree Size ◽  
Irrigation District ◽  
Navel Orange ◽  
Trifoliate Orange ◽  
Rough Lemon

Two experiments with Navel orange scions (CV. Washington and Leng) on a number of rootstocks were done on three sandy Mallee soils in the Mildura irrigation district. Rootstocks included sweet orange (eight cultivars), rough lemon, mandarin (two cultivars), trifoliate orange, and citrange (two cultivars). In experiment 1 (1949 to 1963) eight sweet orange rootstocks gave similar results in terms of yield and tree size. Leng produced more but smaller fruit than Washington, but total weights were similar. In experiment 2 (1959 to 1969 and continuing) Leng trees were larger, produced more fruit, and on one soil a greater weight of fruit per tree than Washington. Sweet orange rootstocks were usually superior to other rootstocks on each soil type, although rough lemon gave results that were similar and, for a few combinations, superior. Trees on mandarin rootstocks were low producers and small in the early part of the experiment, but by the end of the period were yielding as much fruit as those on sweet orange. Trifoliate rootstocks were unsatisfactory, and citrange intermediate between sweet orange and trifoliate. No fruit quality differences ascribable to rootstock were detected.

scholarly journals Effect of Various Irrigation Rates on Growth and Root Development of Young Citrus Trees in High-Density Planting

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1462
Author(s):  
Said A. Hamido ◽  
Kelly T. Morgan
Keyword(s):  
Leaf Area ◽  
Tree Growth ◽  
Root Development ◽  
Root Length ◽  
Planting Density ◽  
Citrus Tree ◽  
Irrigation Rate ◽  
Root Lifespan ◽  
Canopy Volume ◽  
Citrus Trees

Citrus yields have declined by almost 56% since Huanglongbing (HLB) was first found in Florida (2005). That reduction forced citrus growers to replant trees at much higher densities to counter-balance tree loss. The current project aims to determine how much water is required to grow citrus trees at higher planting densities without reducing their productivity. The study was initiated in November 2017 on eight-month-old sweet orange (Citrus sinensis) trees grafted on the ‘US-897′ (Cleopatra mandarin × Flying Dragon trifoliate orange) citrus rootstock planted in the University of Florida, Southwest Florida Research and Education Center (SWFREC) demonstration grove, in Immokalee, FL (lat. 26.42° N, long. 81.42° W). The soil in the grove is Immokalee fine sand (Sandy, siliceous, hyperthermic Arenic Alaquods). The demonstration grove included three densities on two rows of beds (447, 598, and 745 trees per ha) replicated four times each and three densities of three rows of beds (512, 717, 897 trees per ha) replicated six times. Each density treatment was irrigated at one of two irrigation rates (62% or 100%) during the first 15 months (2017–2019) then adjusted (2019–2020) to represent 26.5, 40.5, 53, and 81% based on recommended young citrus trees evapotranspiration (ETc). Tree growth measurements including trunk diameter, height, canopy volume, leaf area, and root development were evaluated. During the first year, reducing the irrigation rate from 100% to 62% ETc did not significantly reduce the young citrus tree growth. Conversely, the lower irrigation rate (62% ETc) had increased citrus tree’s leaf area, canopy volume and tree heights, root lifespan, and root length by 4, 9, 1, 2, and 24% compared with the higher irrigation rate (100%), respectively. Furthermore, the root lifespan was promoted by increasing planting density. For instance, the average root lifespan increased by 12% when planting density increased from 447 to 897 trees per ha, indicating that planting young trees much closer to each other enhanced the root’s longevity. However, when treatments were adjusted from April 2019 through June 2020, results changed. Increasing the irrigation rate from 26.5% to 81% ETc significantly enhanced the young citrus tree growth by increasing citrus tree’s canopy volume (four fold), tree heights (29%), root lifespan (86%), and root length (two fold), respectively. Thus, the application of 81% ETc irrigation rate in commercial citrus groves is more efficient for trees from two to four years of age.

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