Japansche citroen (JC) rootstock is still the main choice for producing citrus seeds for its high availability and compatibility. Other rootstocks have been used in the production, yet they produce unsatisfying results. Based on the theory, there is an alternative to use rootstock as interstock in order to stimulate the growth of scion. The objective of this reseach is to understand the effect of interstock on the growth of Mandarin cv. Batu 55, Tangerine cv. Pontianak and Lime cv. Nimas. This research was conducted in the screen house of Tlekung Experimental Field of Indonesian Citrus and Subtropical Fruits Research Institute (ICSFRI) in Batu-East Java, located on 950 m asl, from January to April 2016. This research was arranged in a CRD design with 4 replications and 24 interstock-scion combination treatments. The interstocks used in this study were Carizzo citrange, Citrumello, Poncirus trifoliata, Volkameriana, Rough lemon, Troyer citrange, Kanci and control (JC) combined with 3 scions namely Mandarin cv. Batu 55, Tangerine cv. Pontianak and Lime cv. Nimas propagated by grafting. The result showed the percentage of successful grafting ranged between 37.5% to 100%, while the percentage of the shoot formed on grafted plants was 75%-100%. The use of Poncirus trifoliata as interstock has stimulated fastest bud break on Tangerine cv. Pontianak in just 24.75 days while the Troyer citrange has stimulated better shoot growth in Lime cv. Nimas, resulted to the highest shoot around 52.20 cm which was significantly different from other treatments. Meanwhile, Carizzo citrange has been found to have some influences to the plant diameter and the number of leave of Lime cv. Nimas but showed insignificant effect on the growth of its own diameter. The use of interstock showed that it can be used to promote the growth of scion which usually has slow growth when it is directly grafted on the rootstock.
ABSTRAK Keragaman Genetik Aksesi Lenggkeng Lokal ABSTRACTThere is no clear history of longan development in Indonesia even though it has developed well in Indonesia for many years.The study aimed at revealing genetic of diversity of local longan was done in Indonesian Citrus and Subtropical Research Institute (ICSFRI) from March to April 2008. ISSR markers were employed to identify the genetic variation among eight morphologically more or less alike accessions of longan ssp. Matrix data was counted and dendogram of samples was constructed using UPGMA and SAHN method. The cluster showed similarity value 0.34-0.86. The highest similarity value was observed between KL I and KL II (0.86) while the lowest one was obtained between KL I and KL V/KL VI (0.34). ISSR markers were able to identify the genetic diversity of longan and were helpful to provide information on genetic diversities especially for future breeding programs.
ABSTRAK. Pengembangan jeruk keprok berwarna kuning dapat dilakukan dengan menanam benih baru atau menerapkan metode top working yaitu metode mengganti suatu varietas tanaman yang ada dengan varietas baru sesuai selera konsumen. Metode top working dapat dilakukan pada batang bawah tanaman atau pada batang atas tanaman yang berfungsi sebagai batang antara atau interstock. Tujuan penelitian ini ialah untuk mengetahui respons pertumbuhan tanaman jeruk keprok Batu 55 pada beberapa interstock melalui metode top working. Penelitian dilaksanakan di Kebun Percobaan Tlekung, Balai Penelitian Tanaman Jeruk dan Buah Subtropika (Balitjestro), Batu, Jawa Timur (950 m dpl.), mulai Bulan April sampai Oktober 2012. Penelitian menggunakan rancangan acak kelompok dengan 10 perlakuan yaitu kombinasi antara interstock (pamelo, jeruk manis, jeruk siam, jeruk purut), dan kontrol (batang bawah Japansche Citroen) pada metode top working cara okulasi dan sambung kulit. Penelitian diulang sembilan kali. Hasil penelitian menunjukkan bahwa perlakuan KB/P/JC-Ok (keprok Batu 55/interstock pamelo/Japansche Citroen-okulasi), KB/M/JC-SK (keprok Batu 55/interstock jeruk manis/Japansche Citroen-sambung kulit), dan KB/M/JC-Ok (keprok Batu 55/ interstock jeruk manis/Japansche Citroen-okulasi) menghasilkan persentase sambungan jadi 100%. Perlakuan KB/JC-Ok (keprok Batu 55/Japansche Citroen-okulasi) menghasilkan pecah tunas paling cepat, sedangkan perlakuan KB/S/JC-Ok (keprok Batu 55/ interstock jeruk siam/Japansche Citroen-okulasi) menghasilkan pertumbuhan terbaik pada pertambahan tinggi tunas dan jumlah daun. Kombinasi perlakuan interstock-top working mempunyai rasio C/N lebih tinggi jika dibandingkan dengan tanaman jeruk muda (pembanding). Hasil penelitian ini untuk memberikan rekomendasi kepada petani tentang penggunaan interstock melalui metode top working pada tanaman jeruk keprok Batu 55. Katakunci: Jeruk; Interstock; Top workingABSTRACT. The development of yellow mandarin may be achieved through planting new seed or applying top working method. Top working is a method for replacing the existing varieties with the new ones that are more preferred by consumers. The method can be done on the scions or stocks which the latter then after top working act as interstocks. The research was intended to evaluate the growth responses of mandarin cv. Batu 55 on some interstocks achieved via top working. The research was done at Tlekung Experimental Station, Indonesian Citrus and Subtropical Fruit Research Institute (ICSFRI), Batu, East Java (950 m asl.), from April to October 2012. This research designed in randomized block design with 10 treatments which were combination between interstock (pummelo, sweet orange, tangerine, lime), and control (Japansche Citroen rootstock) with top working methods (bud grafting and bark grafting). The treatments were done in nine replications. The result indicated that treatments of KB/P/JC-Ok (mandarin Batu 55/pummelo/Japansche Citroen-bud grafting), KB/M/JC-SK (mandarin Batu 55/interstock sweet orange/Japansche Citroen-b...
<p>Indonesian Citrus and Subtropical Fruits Research Institute (ICSFRI) has generated a technology of Bujangseta (bearing fruits throughout the year) to increase citrus plant productivity and to support the sustainable availability of citrus fruits in the market. This study aims to identify the characteristics of Bujangseta technological innovation that might influence the adoption of the technology by farmers. The study was conducted in Banyuwangi Regency in November 2019 by using a census method to all 16 cooperator farmers of Bujangseta technology. This present study applied a descriptive analysis method based on the scoring and category of technological innovation characteristics. The results showed that the innovation characteristics of Bujangseta technology were: 1) it was very profitable since tangerine farming with the application of Bujangseta technology generated higher income than that without the application, 2) it was greatly appropriate with the local conditions as all production supplies were locally available, 3) it was easy to be applied because farmers did not suffer any complication to employ Bujangseta practice, 4) it was easily observed since the results of Bujangseta implementation were easy to be observed visually by farmers and 5) it was easily trial-tested as the method of Bujangseta was easy to try and apply. Therefore, this new technology had a very high adoption opportunity rate, showing that the technology had a great chance of being adopted by farmers.</p>
The increase in imports and the decline in Indonesia's production triggered the government’s intervention in the form of non-tariff barriers. This will surely make a change in Indonesia's mandarin landscape industry. Therefore, this paper aims to construct structured factors building the mandarin industry and attempts to evaluate the impact of several alternative policies, including the non-tariff barriers imposed, in the purpose to find the policies that sustain the industry in the future. Systems dynamics are employed due to their ability to accommodate time delay and reciprocal relationships between sub-systems found in the industry. The time series data of mandarin from BPS were used in this research from 1999 to 2012, which includes production, productive area, productivity, price, local consumption and import.The first step is to construct the existing pattern of the mandarin industry in Indonesia. Afterward, six different scenarios were simulated, including the non-tariff barriers; and they were compared for their ability to sustain the Indonesian mandarin industry. The ability was assessed from the relative value, production, expected profits and import value. The analysis results recommend the government to pay more attention to the disease management and to improve the ratio of agricultural extension agents to areas, which can lead to a more significant impact on the mandarin industry in Indonesia, even with the gradual elimination of non-tariff barriers.
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