Experiments were conducted at Adjuntas substation in the central mountain region of Puerto Rico to determine the effect of four rootstocks on growth and fruit production parameters of six clones of Valencia orange. Concerning fruit characteristics, the most notable differences among clones were in size, but also statistical differences were found in peel percentage and number of seeds per fruit. Significant differences in juice characteristics among clones were also found. Fruit production was superior for all four clones with Cleopatra mandarin as rootstock.There was significant difference between clones 3164 and 3264 concerning fruit production. There were no significant differences in yield efficiency during the first crop year; however, trees on Cleopatra mandarin and sour orange rootstocks were significantly taller, wider and had larger canopy volumes. Significant differences among different clones within particular rootstocks were found for tree height, tree width, canopy volume, fruit production and yield efficiency.
The behavior of 10 chironja clones, studied at the Isabela, Corozal and Adjuntas Substations, demonstrated that graftage of chironja on sour orange rootstock is incompatible as determined by the scion to rootstock ratio. This incompatibility increased with tree age and was greatest in Adjuntas, intermediate in Corozal, and least in lsabela. The Adjuntas trees had significantly thinner trunk (either rootstock or scion) diameter, and smaller canopy volume than those of Isabela and Corozal. This probably accounted for the smaller size of fruits and the lower fruit production in Adjuntas as compared to those of Isabela and Corozal. The Isabela trees had significantly greater trunk (rootstock and scion) diameter and smaller scion/rootstock ratio and canopy volume than those of Corozal. The weight and number of fruits per tree increased with age from 1970-1972, while the weight per fruit was reduced at the same time. The chironja clone 2-4 produced significantly the highest crop and the heaviest fruits; therefore, its multiplication should be encouraged.
The effect of five row spacings (30, 45, 60, 75, and 90 cm) on the marketable yield of three commercial snapbean varieties (Blue Lake 47, Astra, and Harvester) was evaluated in a spring planting at the Isabela and Adjuntas Substations. At Isabela, the highest yields of Blue Lake 47 (17,084 kg/ha) were obtained at 45 cm between rows; the lowest (8,408 kg/ha) at 90 cm. Maximum yields of Harvester (12,353 kg/ha) were obtained at 30 cm, followed closely by 11,927 kg ha at 45 cm. At Adjuntas, the highest yields of Astra (8,497 kg/ha) were obtained with 30 cm between rows; the lowest (5,000 kg/ha) with 75 cm. Maximum yields of Harvester (8,564 kg/ha) were obtained with 45 cm, followed by 8,161 kg/ha with 30 cm. The lowest yield (3,856 kg/ha) was obtained with 90 cm. In both localities, plants spaced 30 and 45 cm between rows were significantly taller than those at wider spacings due to competition for light.
Several native materials were evaluated as bedding materials for the growth of Anthurium at two sites in Puerto Rico. The materials were compared to peat moss for the production of cut flowers. After more than 3 years of data statistically analyzed, the results showed that materials such as cane bagasse, coffee leaf mold, wood shavings, spent ground coffee, cured coffee pulp or coffee parchment, chicken manure, tree bark, and top soil + filter press cake were as effective as peat moss for production of Anthurium flowers.
The effect of four spacings within the row (8, 15, 23 and 30 cm) on the marketable yield of four commercial pole bean varieties, (McCaslan 42, Romano, Kentucky 191 and Blue Lake S-7 Stringless), was evaluated on a winter planting at the Adjuntas Experiment Substation. At the 8 cm spacing, variety Romano was the highest yielder (12,523 kg/ha) while Kentucky 191 had the lowest (9,542 kg/ha). At 15 cm, Kentucky 191 yielded 10,004 kg/ha; and McCaslan 42 only 8,297 kg/ha. At 23 cm, Blue Lake S-7 was highest in yield (11,587 kg/ha) while Romano had the lowest (5,928 kg/ha). At 30 cm, Kentucky 191 was the highest yielder (9,442 kg/ha) while McCaslan 42 was the lowest (4,659 kg/ha).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.