Jurnal Ilmu Pertanian Indonesia
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    Alternatif Perbaikan Kesuburan Tanah Gambut Tebal

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    The soil fertility..

    Struktur Sekretori Tanaman Bahan Ramuan Obat Diabetes

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    Anatomical structure of medicinal plants wich are used in diabetic therapy is not yet completely identified. This research was conducted to study the structure of their secretory tissues. Observation of anatomical structure of leaves was done by making paradermal and transversal sections, while observation of anatomical structure of stem, fruits, and rhizomes were performed by making transversal sections. Microscopic observation found several types os secretory structure in plant organs observed. Glandular hairs were found in kiurat (Plantago mayor L.) leaves, sambiloto (Andrographis paniculata (Burm.f) Wallich ex Nees) leaves, and kumis kucing (Orthosiphon aristatus (Blume) Miq.) leaves; lithocysts cell were found in sambiloto leaves; oil cavity/cells were found in salam (Syzygium polyanthim (Wight) Walp.) leaves, jambu (Psidium guajava L.) leaves, lada (Piper nigrum L.) fruits, and jahe (Zingiber officinale Roscoe) rhizomes; idioblast cells wich contained starch grains were found in brotowali (Tinospora crispa (L.) Miers) stems, lada fruits, and jahe rhizomes; and latex cells were found in brotowali stems

    Kinetika Reaksi Pembentukan Dekstrin Dari Pati Sagu Pada Proses Dekstrinasi Kering Dengan Katalis HCI

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    Kinetics studies.

    Aktivitas Sediaan Gel dari Ekstrak Lidah Buaya (Aloe barbadensis Mill.) pada Proses Persembuhan Luka Mencit (Mus musculus albinus)

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    The purpose of this study was to examined the effectivity of Aloe vera gel formulation on the skin wound healing process based on the macroscopic and microscopic observation. Fourty five DDY strain, 6-8 weeks old mice were used for experimental animals. Mice were incised 1-1.5 cm in the dorsum using sterile scalpels. Mice were divided into three groups. Group I (control) were not treated by anything, Group II were treated by commercial drugs (Bioplacenton), and Group III were treated by Aloe vera gel. Bioplacenton and Aloe vera gel were given topically twice a day to the skin using sterile cotton buds. Each groups consisted of 15 mice and distributed into 5 observation days with 3 replication. Three mice from each groups were euthanized periodically at day 3rd, 5th, 7th, 14th, and 21st post incision for gross pathology examination and to sampling the skin. Gross examination revealed that Bioplacenton and Aloe vera gel showed better result on wound healing process, i.e. the scab formation, scab peeler and unite of the wounded skin edge compared to the control groups. Microscopically, the Bioplacenton and Aloe vera gel groups showed the fastest epidermal re-epithelization compared with the control group. Qualitatively Bioplacenton and Aloe vera gel groups showed more fibrosis and collagen fibres formation than the control groups especially at day 7th and 14th. Scoring Average of neocapillaries formation from all groups showed no difference. Scoring average of inflammatory cells number revealed that control groups showed more cells than the other groups that indicated an high inflammatory activity. Based on macroscopic and microscopic examination we suggest that the Aloe vera gel formulation has a benefit to promote wound healing, and could be used for the treatment of skin wound. Thus, the Aloe vera gel formulation is potential to developed as commercial drugs

    Mekanisme dan Faktor Kimia yang Mendasari Resistensi Beberapa Varietas Padi Terhadap Wereng Batang Coklat Nilaparvata Lugens Stal (Homoptera: Delphacidae)

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    The brown planthopper (BPH) Nilparvata lugens Stal (Homoptera: Delphacidae) is one of the most important rice pest in Indonesia. Integrated pest management (IPM) is the only way of controlling the BPH. The use of resistant varieties is an important component of IPM. The development of BPH biotypes and agricultural practises cause the resistant varieties become susceptible in only 4-6 growing seasons. Understanding BPH - rice plant interactions are necesary. This greenhouse and laboratory studies were to unravel the mechanism and plant chemicals that might play a role in rice plant resistance of selected rice varieties: Cisadane, IR36, IR48, IR64, IR56, Kelara, and Bahbutong. Pelita I-I was used as susceptible check. The BPH colony originating from catches in 1986 in Yogyakarta was used in this study. Various experiments were carried out: evaluation of plant damage, the preference of BPH for feeding and ovaiposition, and population development study. The plants contens of protein, amino acids, water, potassium, calcium, and silica were measured. The mechanism of plant resistance to BPH on IR36, IR48, IR56, IR64, Kelara, and Bahbutong were identified as non-preference and antibiosis. The antibiosis mechanism was more prominent in IR48 and Bahbutong. The plant content of protein, potassium, calcium, and silica may take part in the basis of resistance mechanism. Further studies will be carried out

    Sifat Fisis, Mekanis Serta Keawetan Batang Kelapa Hibrida

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    Nowadays, wood industry in Indonesia suffers from lack of wooden raw material because of the demand is greater than the supply. In order to solve this problem, we need to enhance the use of wood by optimalizing the use of wooden raw material wich has a great potensial, but not well used, for example hybride coconut wood. The purpose of this research were to determine physical, mechanical and chemical properties of hybride coconut wood and its vertically and horizontally variation in order to optimalize the use of hybride coconut wood. This research used three hybride coconut steems, the 6 cm disks were extracted from each stem at 1, 4, 7, and 10 m heights. The analyze of vascular bundle and parenchyma consisted of covered area per cm2 and their chemical composition. Hybride coconut wood had a low specific gravity because vascular bundle covered area was lower than parenchyma per cm2 and low wood substance portion. Low specific gravity caused low mechanical properties. Hight moisture content (specially fresh one) was cause by sugar and starch extractives which had high hygroscopic ability. These extractives content also caused it to be easily attacked by wood destroying factors. Parenchyma covered area per cm2 caused high sugar and starch content. Height and depth factors were visible influence at almost all basic properties of vascular bundle and parenchyma at different level

    KERAGAMAN PRODUKTIVITAS KOMODITAS KEDELAI PADA BERBAGAI SKENARIO PERUBAHAN IKLIM MENGGUNAKAN MODEL IKLIM DAN PERTANIAN

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    The need of soybean in Indonesia grows from time to time. Now, Indonesia imports at about 1,1 milion ton/ha yearly. This condition indicates that the need of soybean in Indonesia can be a serious problem of agricultural sector in the future. Furthermore, the climate change issue as a result of human activity used a large amount of fosil fuel will derive a new problem for agricultural sector which requires a better strategy of anticipation. This point out the important of information in order to estimate the potential of soybean\u27s yield in Indoensia in the future. In general, this research is designed to identify the evidence of climate change and to learn the impact of the climate change scenarios on the future of soybean\u27s yield in Bandung district. For this purpose, literature study and analysis of global circulation model (data) data are applied for identifying the occurrence of climate change. Then, the impact analysis of these scenarios on soybean\u27s yield is conducted by using climate and agricultural simulation model, which consist of statistic and mechanistic models. Analysis of the earth surface mean temperature shows the increasing of global air temperature has been started since 19\u27s century with the occurence of increasing temperature from about -0.4 °C to about 0.1 °C in the year of 1940\u27s. Then, the occurence of climate change in Indonesia can be identified using monthly rainfall data for a certain period. Previous study, which has been conducted by Kaimuddin (2000) shows the changing of rainfall pattern in Indonesia. Additionally, analysis on Global Circulation Model (GCM) data for various climate change scenarios reveal the evidence of rainfall and temperature changing variability in percentage for each model in year 2020, 2050 and 2080. The highest value of A2 scenario in come from NIESS, meanwhile for B2 scenario is GFDL. Then, the minimum value is mostly gained from ECHAM model. Moreover, the result of simulation using maximum and minimum value from those scenario for year 2020 decrease in almost of the whole area of Bandung

    PEMANFAATAN ABU GOSOK DAN KHITOSAN SEBAGAI UPAYA PENINGKATAN MUTU DAN EFESIENSI PADA PENGOLAHAN AGAR-AGAR KERTAS DI PAMEUNGPEUK, GARUT JAWA BARAT

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    This study attempts to increase the quality and for production gelatinous paper that is by using ashes rub as a substitute for potassium hydroxide ( koh ) that serves as penjedal and khitosan to improve the quality of organoleptik from gelatin paper.The research obtained that treatment ashes rub 30 % and khitosan 0.6 % give the best results in the test gel strength compared to the, while in the color and texture not markedly dissimilar and control

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