Browsing by Author "Saavedra Alva, Harry"

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Efecto de cinco dosis de humus de lombriz en el cultivo de tomate (lycopersicon esculentum mill), en suelos ácidos, sector Aucaloma- San Martín – Perú
(Universidad Nacional de San Martín. Fondo Editorial, 2010) Saavedra Alva, Harry; Flores Garcia, Eybis Jose
The present research was realized with the aims to study comparatively the behavior of the tomato, variety Big River, with application located of different doses of earthworm in acid soils, seeking to improve the performance and profitabílity, in the farm Aucaloma of San's Martín National University- Tarapoto, located in the sector Aucaloma to 15 Km from Tarapoto, continuing the road to Cumbaza's San Antonio comprehension of San Roque's district province of Lamas and region San Martín. The design of blocks complete was utilizad at random DBCA, with 6 treatments and 4 repetitions, of the realized evaluations the following results were obtained: the humus of earthworm of 1 O and 6t/ha, it did effect in the cultivate with regard to the height (48.6 cm and 48.15 cm), in number of flowers for plants (18.85 and 14.73).Whereas the treatments with 6t/ha of humus; 1 O t/ha and 8t/ha of humus, obtained higher average of clusters of floral/plant (5.68,5.45 and 5.18).With the dose of 1 O t/ha of humus and 8t/ha of humus majar number of fruits was obtained by plant (9.23 and 8.78). lt 10t/ha of humus, with 599.75 g fruits/crops there obtained the majar performance (18550 kg/ha) wíth the majar performance (18550 kg/ha) with economic profitability of 33/100 cents of new sol for every new invested sol. Key words: tomato, Big River, humus carthworm, acid grounds, aplication located, dose, plant height, flowers far each plant, flowers clusters for each plant, fruits weight at harvest, productíon.
Vegetative propagation of manilkara bidentata (A.dc.) A.chev. using mini-tunnels in the Peruvian Amazon region
(2021-08) Vallejos Torres, Geomar; Ríos Ramírez, Orlando; Saavedra Alva, Harry; Gaona-Jimenez, Nery; Mesén-Sequeira, Francisco; Marín, César
Aim of study: Manilkara bidentata (A.DC.) A.Chev. (‘quinilla’) is a Neotropical tree highly threatened by extensive agricultural practices and climate change, resulting in a substantial reduction of natural stands and seed availability. Commercially, the propagation through seeds of this species is severely impeded by a low germination rate. Vegetative propagation could be an alternative tool for overcoming this limitation. This study aims to evaluate the vegetative propagation of M. bidentata by rooted cuttings using mini-tunnels in the Amazon. Area of study: National University of San Martín, Tarapoto, Region of San Martín, Peru. Forested areas at three localities in the Picota province and two localities in the Bellavista province, San Martín Region, were visited for the selection of plus trees and collection of epicormic shoots from stumps. Materials and methods: the study was performed on leaf areas of 0, 50, and 100% with indole-3-butyric acid (IBA) treatments of 0, 3000, and 6000 ppm, for 9 treatments combinations. The experiment consisted of 3 mini-tunnels, with 3 growth trays established on each mini-tunnel, and 16 cuttings established on each tray (and per treatment), for a total of 144 cuttings. Main results: after 55 days, the best scores in rooting rates (75%), number of roots (3.88), root length (3.26 cm), and budding percentage (94%) were obtained for the combination of 50% leaf area left with 3000 ppm of IBA. Research highlights: we propose the technique of mini-tunnels as a tool for the cloning, rescue, and germplam conservation of M. bidentata.