Yunus, Ismadi
Indonesian Society for Horticulture (Perhimpunan Hortikultura Indonesia Komisariat Aceh)

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Characterization of Pamelo Leaves (Citrus maxima (Burm) Merr) Aceh, Indonesia Yunus, Ismadi; Putri, Intan Yatima; Hafifah, Hafifah
Journal of Tropical Horticulture Vol 1, No 1 (2018): October 2018
Publisher : Indonesian Society for Horticulture (Perhimpunan Hortikultura Indonesia Komisariat Aceh)

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Abstract

Pamelo (Citrus maxima (Burm.) Merr) is one type of orange that is prospectively cultivated in Indonesia. Pamelo in Indonesia is very diverse, as the skin of the fruit is green to red, some are  with seed and seedless. Pamelo plants have diverse leaves, both in shape, size, lamina and thickness. The various leaf shapes between plants which show below the genetic resources of pamelo plants are numerous and varied. Information about pamelo aceh plants, especially about the character of leaves is still very limited. This information can be used to determine the characteristics of pamelo aceh so that later it will be very useful in classifying and grouping plants. The purpose of this study was to determine the character of the Pamelo Giri Matang leaf in Aceh, Indonesia. The study aims to see the level of diversity of pamelo in the village of Pante Lhong. The study was conducted in the village of Pante Lhong, Peusangan District, Bireuen,  District, Aceh, Indonesia and at the Laboratory of Agroecotechnology, Faculty of Agriculture, Universitas Malikussaleh, from September to November 2017. The sample plants used were 15, aged between 10 and 25 years. The research was conducted using descriptive method with sampling by purposive sampling method. Observations were carried out quantitatively and qualitatively based on Descriptors for Citrus (PGRI). The results showed that Pamelo Giri Matang Aceh Indonesia was an evergreen plant with an intensity of green to dark leaf color. The average leaf lamina has a length of 14.62 cm and a width of 7.04 cm with an average area of 59.74 cm2. The most commonly found leaf wings are obovate.
The Relationship between Transpiration and Calcium Fertilization on Mangosteen (Garcinia mangostana L.) Seedlings Akmal, Ajmir; Santosa, Edi; Poerwanto, Roedhy; Yunus, Ismadi; Handayani, Rd. Selvy
Journal of Tropical Horticulture Vol 1, No 1 (2018): October 2018
Publisher : Indonesian Society for Horticulture (Perhimpunan Hortikultura Indonesia Komisariat Aceh)

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Abstract

The availability of nutrients in plants depends on the ability of plants to absorb nutrients from the soil. One of the processes absorbed by plants is by the presence of the transpiration process.  Good transpiration will provide enough nutrients for plants which increase the productivity and quality of mangosteen. One of the quality standards of mangosteen fruit for export quality is the free from yellow sap contamination. It can be possible that transpiration can improve the quality of mangosteen fruit by applying fertilization. In this study Ca fertilization was carried out on mangosteen seeds, where this study aims to investigate the effectiveness of Ca uptake by mangosteen plants with the level of water loss by transpiration. This research was conducted in November 2016-March 2017 at the Leuwikopo Experimental Garden, Bogor Agricultural University. Morphological observations were carried out in its Experimental Garden and the Postharvest Laboratory whileanalysis of calcium content of plant tissue was done at the Department of Agronomy and Horticulture, Bogor Agricultural University. Data obtained then were analyzed using ANOVA test. If the results were significant, Duncan Multiple Range Test (DMRT) was then tested at 0.05 probability level. The results revealed that the transpiration rate of mangosteen plants from several treatments showed a significant difference, the transpiration rate was higher, especially in fertilized plants. The size of the 12th leaf, plants treated with fertilizer have a larger size than the treatment without fertilization. Fertilizing and providing enough water can maintain the growth of the plants.