Effect of giberelin (GA3) concentration on growth and yield of Chinese kale (Brassica oleracea L. Var alboglabra) in various medium using hydroponic wick system . This research conducted from April until July 2016 in Wire House and Plant Physiology Laboratory, Department of Biology, Faculty of Mathematics and Natural Science, Andalas University. The purposes of this research were to obtain GA3 concentration and planting medium that accelerate growth and yield of Chinese kale and determine the interaction between GA3 and planting medium to the gowth and yield of Chinese kale planted using hydroponics wick system. This research used Completely Randomized Design (CRD) in factorial with three replications, as the first factor were concentration of GA3 (0 ppm, 20 ppm, 40 ppm and 60 ppm) and the second factor were medium (zeolite, sand, husk and sawdust). The best result in accelerated the growth of Chinese kale was the treatment at the concentration of 60 ppm GA3 and zeolite was suitable medium to Chinese kale growth. This research found the interaction between GA3 and medium on the length of the roots Chinese kale used hydroponic wick system.
A b s t r a c t A r t i c l e I n f oTest of crude extracts of several plant species was conducted in a screen house to determine the best plant species and the most effective concentration of extract for increasing growth of upland rice (Oryza sativa L.) cultivated in Ultisol. The test was done using Nested Design. First factor was sources of extracts: 1) leaves of cassava, 2) leaves of G. linearis, 3) C. asiatica, 4) stem bark of A. scholaris, and 5) fruit pericarp of mangosteen. Second factor was extract concentrations: 0 (control), 25, 50, and 100 mg/L. Applications of crude extract of mangosteen fruit pericarp at concentration 50 mg/L increased fresh weight of roots with the highest average weight 48.33 g, while the control was 13.33 g. However, plant height given extract of mangosteen (50 mg/L) was lower (74.90 cm) compared to the one in control (87.70 cm). On lower (25 mg/L) and higher (100 mg/L) concentrations of mangosteen pericarp extracts, fresh weight of roots tended to be lower than in control. Application of crude extract of C. asiatica at concentration 100 mg/L showed higher plant height with average 79.30 cm than in control 69.60 cm. Application of crude extract of mangosteen fruit pericarp showed the increasing of plant height from two to three weeks after planting, and crude extract of C. asiatica increased the plant height in third weeks after planting.
The research about callus induction Artemisia vulgaris L. by giving several concentration 2,4-Dichlorophenoxyacetic acid (2,4-D), has been done from . The aim of this study was found the effective concentration of 2,4-D to induce callus of A. vulgaris. The research used Completely Randomized Design (CRD) with 7 treatments and 4 replications. The treatments were : without 2,4-D (control); 0.25 mg/L 2,4-D; 0.50 mg/L 2,4-D; 0.75 mg/L 2,4-D; 1.00 mg/L 2,4-D; 1.25 mg/L 2,4-D; 1.5 mg/L 2,4-D. The result showed that 0.25-1,5 mg/L 2,4-D were able induction callus of A. vulgaris, with compact until the friable texture, color of the resulting callus is yellowish green, brownish-green, yellow-brown, white yellowish and greenish white. 2,4-D 1.5 mg/L was the best concentration to increase fresh weight of callus.
The research about effect of Nitrogen fertilizer and stress water on the growth and artemisinin content of Artemisia vulgaris L. has been conducted from December 2015 to March 2016 in Screen House and Plant Physiology Laboratory, Department of Biology, Faculty of Mathematics and Natural Science, Andalas University, Padang. The purpose of this research were to the effect of Nitrogen fertilizer, stress water, and their interaction between on the growth and artemisinin content of A. vulgaris. This research used Completely Randomized Design (CRD) in factorial with four treatments ad three replications. The result showed that the number of leaves, plant height, length of roots, fresh weight, dry weight and of Artemisia vulgaris L. were increased significantly on N fertilizer treatments. The treatment of stress water 60% of volume capacity gave significantly effect on numbers of leaves and the highest content of Artemisinin was 80% volume capacity. The interaction of N fertilizer and stress water did not showed significantly effect on the growth and artemisinin content of Artemisia vulgaris L.
The research about application of liquid organic fertilizers with indigenous microorganism bioactivator of HPPB for growth of Desmodium heterophyllum on limestone mined land at PT. Semen Padang, had been conducted from May to August 2015 in Nursery and Reforestation, Laboratory of Plant Physiology Department of Biology, and the Laboratory of Soil Science Faculty of Agriculture, Andalas University, Padang. The research aimed to determine the effect and concentration of Liquid Organic Fertilizers (LOF) by using indigenous microorganism bioactivator originated from HPPB in limestone mined land ofPT. Semen Padang. This study used Completely Randomized Design (CRD) with five treatments and four replications. The treatments were control without LOF (A), 10% LOF (B), 20% LOF (C), 30% LOF (D) and 40% LOF (E). The results showed that 10% LOF was the best concentration to increase the number of leaves (36,44), percentage of land cover (6,71%) and fresh weight of plants (5,15g).
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