Nursery tree design modifies annual dry matter production of newly grafted ‘Royal Gala’ apple trees

Photosynthetic Performance and Vegetative Growth in a New Red Leaf Pear: Comparison of Scion Genotypes Using a Complex, Grafted-Plant System

“…Thus, the development of more nodes and greater mean leaf size from early in the season may have increased intercepted solar radiation and dry matter accumulation in trees containing ‘Hosui’ scions (H H and M) compared to homogeneous ‘PremP009’ trees. Considering young newly-grafted apple trees, tree size (dry mass) at the end of the first growing season was found to be strongly dependent on the rate that leaf area increased early in the season (van Hooijdonk et al, 2015 ). The behavior of H P trees showed slower leaf area formation early in the season, and earlier time of shoot termination, developing shorter shoots, meaning H P shoots had a shorter growth duration.…”

“…Grafted trees were planted into black polythene 50 l bags containing growing medium comprised: 0.8 composted bark, 0:2 pumice (by volume), 1 g l −1 6-month slow release fertilizer, 3 g l −1 9-month slow-release fertilizer (each 13 N, 5.7 P, 10.8 K, 1.2 Mg) (Nutricote r., Chisso-Assahi Fertilizer Co., Japan), and 0.6 g l −1 Magri-Trace (15 Mg, 3.2 Ca, 18 Fe, 3 Mn, 4 Zn, 3 Cu, 0.6 B, 0.08 Mo) (HortFert Plus Ltd, NZ) (van Hooijdonk et al, 2015 ).…”

“…Diameter, length and node number of all primary axes were measured monthly throughout the growing season following the protocol described by van Hooijdonk et al ( 2015 ) for the bi-axis nursery tree design. The diameters of the primary axes were measured with digital calipers and were used for calculating the circumference and the total shoot cross-sectional area (SCA) for each tree.…”

“…Another factor that limits young tree dry matter accumulation is leaf area development, which may well differ between genotypes. In young apple trees, van Hooijdonk et al ( 2015 ) reported that dry matter accumulation was limited by the rate of early-season leaf area development necessary for the interception of solar radiation for photosynthesis. Thus, measurement of node/leaf formation of the primary axes is as important as the measurement of leaf photosynthetic rates to understand and interpret the growth and physiological behavior of young trees.…”

Multispectral aerial images to phenotype yield potential and tree inventory mapping: case studies in dry pea (<em>Pisum sativum</em>) and apple (<em>Malus domestica</em>) nursery

“…Honeycrsip) with most local nurseries pre-sold for next few years. Overall, nurseries are generally planted in plastic pots under semi-controlled conditions, where individuals present regular shapes and spacing (Hooijdonk et al, 2015). In the U.S. Pacific Northwest, the panorama changes, with plants growing directly on the ground with somewhat irregular shapes and spacing.…”