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Studies on Dormancy Periods and Growth Rhythm of Shoot and Root of Mangosteen (Garcinia mangostana L.) Hidayat, Ramdan; Surkati, Achmad; Poerwanto, Roedhy; Darusman, Latifah K.; Purwoko, Bambang S.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

Mangosteen has a good prospectus for international market. Many people in the world like this fruit because it is delicious, has high nutrient contents, and it can be consumed as a fresh fruit. The growth of mangosteen is very slow with a very long juvenile period because of its long dormancy period. The objective of this research was to study the dormancy periods and growth rhytm of shoot and root of young and adult mangosteen seedlings. The research used completely randomized design and consisted of two experiments. The first experiment was to study the dormancy and flushing periods. The second experiment was to study the growth patterns of shoot and root foom several ages of mangosteen seedlings. This research was conducted at Mekarsari Fruit Park, Cileungsi, Bogor. The result of the experiment showed that two years old of mangosteen seedling had 5 flushes per year, four years old of mangosteen had 3-4 flushes per year, and eight years old of mangosteen only had 2 flushes. Dormancy periods were significantly different between 2,4 and 8 year of mangosteen seedling. After the seedlings have branches, the dormancy periods become twice as many as that before branching. The roots grew rapidly two weeks before flush and slower after flush occurred.   Key words: Garcinia mangostana, dormancy, flush, seedling
FAKTOR YANG MEMPENGARUHI PERILAKU KONSUMEN BUAH IMPOR Sudiyarto, Sudiyarto; Hidayat, Ramdan; Widayanti, Sri
Jurnal Sosial Ekonomi Pertanian Vol 1, No 2 (2007)
Publisher : Jurnal Sosial Ekonomi Pertanian

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Consumers hold important role in determination whether the product has superiority or not. The overflowing or import fruits affected to a strong competition between local and impor fruits.  Although local fruit seemingly lost in the competing with import fruits, however the consumer (especially city consumer) is the final determiner who act the jury to judge the kind of fruit that is superior through multi attribute judgement. The research objected was to analyze the influece of the factors namely culture, social enviroment, individual, psychological and marketing strategy toward consumer’s attitude in purchasing fruits to show ‘competitive value’ of local fruit toward impor fruits. This research purposely conducted in Surabaya as one of the final destinations for fruit marketing with fruit’s consumer as a respondent and using survey method.  Sample taken of 140 responden from five Surabaya areas. Data collection conducted by interviews and direct obsevation toward several research object. This  research analyzed by Structural Equation Modelling (SEM). The result shows that on import fruits, changing culture and the increasing of individual characteristic significally significant effect to consumer behaviour in import fruits consumtion. Furthermore, the consumer  achievement behaviour statistically significant support to vendor to take  “marketing strategi”   Keywords : Consumer Behaviour, Import fruits, Structural Equation Modelling
FAKTOR YANG MEMPENGARUHI PERILAKU KONSUMEN BUAH IMPOR Sudiyarto, Sudiyarto; Hidayat, Ramdan; Widayanti, Sri
JSEP (Journal of Social and Agricultural Economics) Vol 1 No 2 (2007)
Publisher : University of Jember

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Abstract

Consumers hold important role in determination whether the product has superiority or not. The overflowing or import fruits affected to a strong competition between local and impor fruits.? Although local fruit seemingly lost in the competing with import fruits, however the consumer (especially city consumer) is the final determiner who act the jury to judge the kind of fruit that is superior through multi attribute judgement. The research objected was to analyze the influece of the factors namely culture, social enviroment, individual, psychological and marketing strategy toward consumer?s attitude in purchasing fruits to show ?competitive value? of local fruit toward impor fruits. This research purposely conducted in Surabaya as one of the final destinations for fruit marketing with fruit?s consumer as a respondent and using survey method.? Sample taken of 140 responden from five Surabaya areas. Data collection conducted by interviews and direct obsevation toward several research object. This? research analyzed by Structural Equation Modelling (SEM). The result shows that on import fruits, changing culture and the increasing of individual characteristic significally significant effect to consumer behaviour in import fruits consumtion. Furthermore, the consumer ?achievement behaviour statistically significant support to vendor to take? ?marketing strategi? ? Keywords : Consumer Behaviour, Import fruits, Structural Equation Modelling
Studies on Dormancy Periods and Growth Rhythm of Shoot and Root of Mangosteen (Garcinia mangostana L.) Hidayat, Ramdan; Surkati, Achmad; Poerwanto, Roedhy; Darusman, Latifah K.; Purwoko, Bambang S.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

Mangosteen has a good prospectus for international market. Many people in the world like this fruit because it is delicious, has high nutrient contents, and it can be consumed as a fresh fruit. The growth of mangosteen is very slow with a very long juvenile period because of its long dormancy period. The objective of this research was to study the dormancy periods and growth rhytm of shoot and root of young and adult mangosteen seedlings. The research used completely randomized design and consisted of two experiments. The first experiment was to study the dormancy and flushing periods. The second experiment was to study the growth patterns of shoot and root foom several ages of mangosteen seedlings. This research was conducted at Mekarsari Fruit Park, Cileungsi, Bogor. The result of the experiment showed that two years old of mangosteen seedling had 5 flushes per year, four years old of mangosteen had 3-4 flushes per year, and eight years old of mangosteen only had 2 flushes. Dormancy periods were significantly different between 2,4 and 8 year of mangosteen seedling. After the seedlings have branches, the dormancy periods become twice as many as that before branching. The roots grew rapidly two weeks before flush and slower after flush occurred. ? Key words: Garcinia mangostana, dormancy, flush, seedling
KARAKTERISTIK DAN AKTIVITAS ANTIOKSIDAN BERAS ANALOG DARI TEPUNG KOMPOSIT (GADUNG, JAGUNG, MOCAF) DENGAN PENAMBAHAN PEWARNA ANGKAK (CHARACTERISTICS AND ACTIVITIES ANTIOXIDE RICE ANALOG OF COMPOSITE FLOUR (MADE, CORN, MOCAF) WITH ADDITIONAL DYES ANGKAK) Winarti, Sri; Djajati, Sri; Hidayat, Ramdan; Jilian, Latni
REKAPANGAN Vol 12, No 1 (2018): REKAPANGAN
Publisher : UPN VETERAN JAWA TIMUR

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Abstrak Beras analog merupakan beras tiruan yang berbentuk dan mempunyai tekstur menyerupai beras namun dibuat dari bahan pangan lokal non beras seperti umbi-umbian maupun serealia lainnya. Salah satu umbi yang dapat digunakan dalam pembuatan beras analog adalah umbi gadung. Karakteristik beras yang dihasilkan dapat ditingkatkan dengan substitusi tepung lain, salah satunya adalah mocaf. Selain itu, untuk meningkatkan nilai fungsional beras, dapat ditambahkan bahan pangan lain yang mengandung antioksidan, salah satunya yaitu angkak. Penelitian yang dilakukan bertujuan untuk mengetahui pengaruh substitusi dan penambahan angkak terhadap karakteristik dan aktivitas antioksidan beras yang dihasilkan. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) yang terdiri dari 2 faktor. Faktor pertama adalah perlakuan proporsi tepung gadung : tepung mocaf (90% : 10% ; 80% : 20% ; 70% : 30% ; 60% : 40%) dan faktor kedua adalah penambahan Angkak (0,6 %; 1,2%; 2%) dengan kombinasi perlakuan 12 perlakuan dan dua kali ulangan. Data dianalisis menggunakan metode two-way ANOVA pada tingkat kepercayaan 95%, Jika ada perbedaan antar perlakuan dilanjutkan dengan Uji Tukey α = 5%. Hasil penelitian menunjukan perlakuan terbaik adalah beras analog dengan substitusi tepung mocaf 20% dan penambahan angkak 2% dengan kadar air 10,17%, kadar abu 2,27%, kadar pati 55,41%, kadar amilosa 25,61%, intensitas warna L,a,b berturut-turut adalah 55,66,19,93, 13,28, aktivitas antioksidan 62,10%, daya rehidrasi 121,33%, volume pengembangan 133,52. Kata kunci : Beras analog, umbi gadung, angkak, antioksidan,mocaf
Aplikasi Streptomyces sp. Sebagai Agen Hayati Pengendali Lalat Buah (Bactrocera sp.) dan Plant Growth Promoting Bacteria (PGPB) pada Tanaman Tomat dan Cabai Suryaminarsih, Penta; Harijani, Wiwik Sri; Syafriani, Elly; Rahmadhini, Noni; Hidayat, Ramdan
AGRIUM: Jurnal Ilmu Pertanian Vol 22, No 1 (2019)
Publisher : UNIVERSITAS MUHAMMADIYAH SUMATERA UTARA

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Abstract

Penelitian ini bertujuan untuk mengaplikasikan Streptomyces sp. sebagai agen hayati pengendali lalat buah dan Plant Growth Promoting Bacteria (PGPB) pada tanaman tomat dan cabai. Streptomyces sp. yang digunakan berasal dari hasil eksplorasi dari rhizosfer lahan tomat yang terkontaminasi pestisida di Kecamatan Pare dan hutan lindung Merubetiri. Percobaan disusun menggunakan Rancangan Acak Lengkap dengan 2 faktor. Faktor pertama yaitu isolat asal lahan tomat yang terkontaminasi pestisida (TP), isolat hutan lindung Merubetiri 1 (Mrb1) dan isolat hutan lindung Merubetiri 2 (Mrb2), sedangkan faktor kedua adalah seri pengenceran yaitu seri pengenceran 103, 104, 105.Masing-masing perlakuan diulang sebanyak 4 kali. Hasil penelitian menunjukkan semua isolat Streptomyces sp. yang digunakan sebagai agen hayati dapat mengendalikan lalat buah Bactrocera sp. dan berpotensi sebagai PGPB untuk tanaman tomat dan cabai. Rata-rata pertumbuhan tanaman tomat dan cabai tertinggi dengan perlakuan Streptomyces sp. dari lahan tomat Pare (TP) dengan seri pengenceran 103. Jumlah bunga yang terbanyak terdapat pada tanaman tomat dengan pengaplikasian TP dengan seri pengenceran 105 dan Mrb dengan seri pengenceran 103