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INDONESIA
Journal of Tropical Crop Science
Published by Institut Pertanian Bogor
ISSN : 23560169     EISSN : 23560177     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
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.
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Articles 5 Documents
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Search results for , issue " Vol 3 No 3 (2016): Journal of Tropical Crop Science" : 5 Documents clear
Fruit Coating with Chitosan and Beeswax to Increase Papaya Shelf Life Mukdisari, Yurisqi; Suketi, Ketty; Widodo, Winarso Drajad
Journal of Tropical Crop Science Vol 3 No 3 (2016): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

Papaya (Carica papaya) is a climacteric fruit with an increased respiration rate during ripening process. Papaya respiration rate can be inhibited by providing a coating on the surface of the fruits, including chitosan, a polysaccharide derived from shrimp shell waste, or beeswax.The purpose of this research was to examine the effects of chitosan and beeswax coating on the shelf life and quality of papaya Callina fruit during storage. Results of the experiments showed that fruit coating with chitosan and beeswax can extend the shelf life of papaya Callina by four to five days compared to control due to inhibition respiration rate of papaya fruits during storage.The use of chitosan and beeswax was beneficial to maintain the physical and chemical quality of papaya Callina fruits.
Characterization of 13 Accessions of Purslane (Portulaca sp.) from Bogor, West Java, Indonesia Setiawan, Farensa Ikman Dedi; Aisyah, Syarifah Iis; Krisantini, Krisantini
Journal of Tropical Crop Science Vol 3 No 3 (2016): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

Characterization is part of crop the breeding process aims to protect biodiversity and preserve local germplasm. Indonesia has two known species of Portulaca, Portulaca oleracea and P. grandiflora. Thirteen Portulaca accessions have been collected from Bogor area, comprising five accessions of Portulaca oleracea and eight accessions of Portulaca grandiflora. This study was aimed at the characterization of the 13 accessions and was undertaken at Indoflower BLST, Bogor, between October 2015 to February 2016. The results showed a significant difference in the color of flowers between the two species of Portulaca. The most significant difference is the overall appearance of P. oleracea species. Character color and shape of the flowers between the P. grandiflora white (GW) and P. oleracea are similar.  Significant differences between the species exist in relation to the root systems, but the root systems of accessions within each species are generally similar.  The branching characteristics between the two species and among accessions are generally similar, with branches emerging through the base of leaves or nodes.   However, there are differences in the leaf characteristics between the two species. This study has provided information on flower characteristics of P. grandiflora and P. oleraceae which will be valuable for future breeding efforts in Portulaca. 
Soil Fertility Assessment of Sugarcane Farms in Barangay Aglayan, Malaybalay, Bukidnon, Philippines Ligan, Willy Aclon
Journal of Tropical Crop Science Vol 3 No 3 (2016): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

A soil fertility assessment survey was conducted at Barangay Aglayan, Malaybalay, Bukidnon, Philippines, on selected farms to assess the soil chemical properties (pH, OM, Extractable P and Exchangeable K) of sugarcane farms. A survey questionnaire was used to gather information among farms and a total of twenty-two (22) sugarcane farms were collected for soil samples and analyzed at the Soil and Plant Analysis Laboratory, College of Agriculture, Central Mindanao University. The 22 sugarcane farms surveyed in of Barangay Aglayan, Malaybalay, Bukidnon were identified as very strongly acidic, have medium organic matter content, low extractable phosphorus and very low in exchangeable potassium. These results demonstrated that the sugarcane farms in Bukidnon need amendments to meet the recommended soil test values for sugarcane. The results of this study have provided basic information to generate a soil nutrient map of sugarcane farms in Bukidnon, Philippines.
Evaluation of Leaf Spot Resistance and Agronomic Characteristics of Groundnut Advanced Breeding Lines Wahyu, Yudiwanti; Achmad, Achmad; Junaedi, Wahyu
Journal of Tropical Crop Science Vol 3 No 3 (2016): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

Leaf spot is a major groundnut disease in Indonesia and worldwidewhich has the potential to cause a yield loss of up to 60%. The use of leaf spot resistant cultivars is an easy, economical, and environmentally friendly way in groundnut cultivation to maintain high yields. The objective of the research was to evaluate the yields of 16 groundnut lines which had been developed to be leaf spot resistant and high yielding. The research was conducted in 2010 – 2011 at the Bogor Agricultural University (IPB) experimental station in Cikarawang, Indonesia. A randomized complete block design with three replications was used in the experiment. The groundnut lines evaluated were crosses between “Gajah”, a cultivar which is known to be susceptible to leaf spot, and the resistant line GPNC- WS4. Four Indonesian cultivars “Gajah”, “Jerapah”, “Zebra” and “Sima” were used as control. The results showed that selected lines demonstrated better resistance to leaf spot compared to “Gajah”. Their agronomic characteristics, such as pod number, filled pod number, pod weight, and kernel weight, were not significantly different from the control cultivars. The results of this study have provided information on groundnut leaf spot resistant lines for further evaluation.
Controlling Poinsettia (Euphorbia pulcherrima Will.) Height with Growth Retardant Application in West Java, Indonesia Sukma, Dewi; Megawati, Gina
Journal of Tropical Crop Science Vol 3 No 3 (2016): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

A study was conducted to evaluate the effects of the growth retardant Cycocel application in the growth and development of poinsettia (Euphorbia pulcherrima) ‘Freedom Red’.  Cycocel was applied by spraying plant shoots at the concentrations of 1000, 1500, 2000, 2500 ppm. The increase in cycocel concentrations reduced plant height, leaf size, internodal length, plant spread and the number of flowering plants. All cycocel concentrations resulted in an ideal potted plant height. The optimum spray concentration of Cycocel used to obtain compact and uniformly flowering plants under tropical West Java environment was 1000 ppm.

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