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INDONESIA
Journal of Tropical Crop Science
ISSN : 23560169     EISSN : 23560177     DOI : -
Core Subject : Agriculture,
Journal of Tropical Crop Science is an international journal publishing research related to tropical crops. Articles in the journal focus on in-vivo and in-vitro production and production environment, breeding, seed technology, physiology, postharvest, pest and pathology of cereals, vegetables, fruits, ornamentals, medicinal and plantation crops; soil, landscape, turf and agro ecology management under tropical conditions.
Arjuna Subject : -
Articles 114 Documents
PLANT GROWTH PERFORMANCE OF TOP GRAFTED YOUNG CACAO AT VARIOUS ELEVATIONS IN INDONESIA Poleuleng, Andi Besse; Agusta, Herdhata; Yahya, Sudirman; Wachjar, Ade; Tjoa, Aiyen
Journal of Tropical Crop Science Vol 7 No 02 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

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Abstract

The purpose of this study was to evaluate the plant growth performance of top grafted young cacao cultivated in various elevations. This research was conducted from January-August 2019 in South Sulawesi and Central Sulawesi. A total of 54 plants were taken randomly from 6 locations with 3 altitudes (<300, 300-600, >600 meter above sea level, as.). The results showed that there was not significant different of plant height, stem circle, crown circle, the number of primary branches, the number of flowers, the length of horizontal and vertical roots in response to different elevations. However, the height of primary stem and leaves number of cacao from <300 m asl was significantly greater than those from either 300-600 m asl or > 600 m asl. The largest crown portion of actual biomass was found in the branches, then followed by the leaves and stem. While the highest actual root biomass was found at 10-20 cm soil depth.
NONPARAMETRIC STABILITY ANALYSIS OF STARCH CONTENT OF GAMMA IRRADIATED CASSAVA AT THREE LOCATIONS IN WEST JAVA, INDONESIA Agustina, Ferra Anggita; Khumaida, Nurul; Ardie, Sintho Wahyuning; Syukur, Muhamad
Journal of Tropical Crop Science Vol 7 No 02 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (647.771 KB)

Abstract

Cassava is one of the largest starch producing tuber crops in Indonesia. Tapioca from cassava starch can be used as a raw materials for a variety of foods including biscuits, instant porridge, meatball, sausage, nuggets, and flour condiment. Breeding programs to improve cassava yield and starch content by using mutagen gamma rays irradiation was tested in four cassava generations (M1V4). Cassava is propagated by stem cuttings and the new characteristic obtained from gamma irradiation mutation is stable and can be passed from one generation to the next. Cassava mutants were obtained by evaluating the performance in different environmental conditions. The testing of yield adaptability and stability through a series of multi location is an important step before a new variety can be released. The aim of this research was to compare nonparametric stability and to evaluate the stability of the starch content of 16 genotypes (14 mutants and 2 varieties) in three locations in West Java Province i.e. Tapos (Depok), Cikarawang (Bogor), and Ciseeng (Bogor). Experiments were conducted in a completely randomized block design with three replications nested in each environment. Testing of yield stability in this study used four approaches with 10 parameters of nonparametric method. Starch content was estimated using gravimetric method. Based on frequency stability ranking of starch content from gravimetric method the G63142 genotype had the highest starch content estimation (29.99%), and the top five genotypes with high starch content were G63142, G61142, ?Manggu?, G62151, and G63124. G61142 was categorized as genotype with static and dynamic stability, therefore this genotype is a very potential mutant to be released, whereas G63124 is categorized as a genotype with a static stability. Genotypes G63142, G62151, and ?Manggu? had variable but relatively high starch content.
THE GROWTH, FRUIT SET AND FRUIT CRACKING INCIDENTS OF TOMATO UNDER SHADE Ulinnuha, Zulfa; Chozin, Muhammad Achmad; Santosa, Edi
Journal of Tropical Crop Science Vol 7 No 02 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (515.438 KB)

Abstract

Six tomato genotypes were grown in the field under full sun at 50% reduced light intensity using shading net to evaluate growth, fruit set, and fruit cracking incident. The experiment was conducted during the rainy season in December 2016 to March 2017 in Cikarawang Experimental Station, Bogor, Indonesia. The genotypes tested were sensitive (?Tora? and F7005001-4-1-12-5), tolerant (F7003008-1-12-10-3 and F7003008-1-12-16-2), and shade-loving (SSH-3 and ?Apel Belgia?). The results showed 50% shading delayed flowering and harvesting time in all genotypes. Genotype and shading treatments had an independent effect on fruit set. Shaded plants had lower flower abortion and resulted in a higher number of fruits per harvest, except in ?Apel Belgia? and ?Tora? genotypes. Fruit cracking incidents were low under shading implying the use of shading can increase tomato quality. However, it needs further investigation through using natural shading, e.g., intercropping system before this finding is applied in farmers? field.
CORRELATIONS OF NITROGEN, PHOSPHORUS, POTASSIUM, PIGMENTS AND TOTAL FLAVONOIDS OF MORINGA OLEIFERA LAM. LEAVES IN THE VEGETATIVE AND GENERATIVE PHASES Rasmani, Rasmani; Aziz, Sandra Arifin; Suketi, Ketty
Journal of Tropical Crop Science Vol 7 No 02 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (916.379 KB)

Abstract

Moringa oleifera is universally known as the miracle plant or the tree of life. Moringa leaf extract contains phenolic acids and flavonoids, especially flavonols (quercetin, kaempferol, isorhamnetin glycosides) and flavones (apigenin). This study aimed to elucidate any correlations between nutrient, pigment, and flavonoid concentrations for different leaf positions and different growth phases. The results showed that pigment and total flavonoid concentrations increased from the 1st leaf to the 5th leaf, while nutrient concentration decreased. Pigment concentration, total flavonoid, and nutrient concentration were higher in the vegetative phase than the generative phase. The concentration of nutrients in the generative plants displayed a significant positive correlation with chlorophyll concentration. The 1st to 5th leaf of the vegetative plants can be used as indicator leaves for tissue analysis of the moringa plant.

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