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All Journal Agrotrop : Journal on Agriculture Science International Journal of Biosciences and Biotechnology E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Jurnal Penelitian Pengelolaan Daerah Aliran Sungai Agrica: Journal of Sustainable Dryland Agriculture
WIYANTI WIYANTI
Program Studi Agroekoteknologi Fakultas Pertanian Universitas Udayana
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science

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Journal : International Journal of Biosciences and Biotechnology

 1 
THE ROLE OF ORGANIC MATTER ON IMPROVEMENT OF THE PROPERTIES OF KUSAMBA BEACH SAND SOIL, DAWAN SUB-DISTRICT, KLUNGKUNG REGENCY, BALI FOR WATERMELON (Citrullus lanatus Tunb) CULTIVATION Wiyanti Wiyanti; Ni Nengah Soniari; I Nyoman Dibia
International Journal of Biosciences and Biotechnology Vol 6 No 2 (2019)
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University in cooperation with Asia-Oceania Bioscience and Biotechnology Consortium (AOBBC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (163.557 KB) | DOI: 10.24843/IJBB.2019.v06.i02.p05

Abstract

The study on The Role of Organic Matter on Improvement of The Properties of Kusamba Beach Sand Soil, Dawan Sub-District, Klungkung Regency, Bali For Watermelon (Citrullus lanatus Tunb) Cultivation was conducted in the green house of Agriculture Faculty, Udayana University, Bali. The aim of this study was to determine the role of organic matter in the soil properties of beach sand (Entisol type) to increase crop productivity of watermelon. The research used pot experiment with completely randomized design (CRD) method. The treatments used was organic fertilizer of waste cattle with base fertilizer (N, P, K). The dosage of organic fertilizer were: P0 (20% of the weight of soil); P1 (40%); P2 (60%), and P3 (80%). Each treatment was repeated three times, so in total were 12 pots treatment. Organic matter can decrease bulk density, soil permeability, and increase the total porosity of the soil. It was also able to increase total nitrogen, availability P in soil, dry weight of crop and the weight of the fruit at harvest. The highest bulk density was at P0 and the lowest was at P3 or decreased by 23.17%. The soil porosity increased by 7.98%, while the soil permeability decreased by 26.29%. The highest of total Nitrogen and P availability at treatment P3 which increased by 100% and 135.33% repectively when compared with P0. The dry weight of crop and weight of fruit at harvest increased of 48.81% and 97.70% when compared with treatment of P0.
CARBON STOCK DUE TO THE INTENSITY OF THE USE OF FOREST AREAS IN FOREST MANAGEMENT UNIT OF WEST BALI Wiyanti Wiyanti; Indayati Lanya; I Nyoman Merit; Made Antara
International Journal of Biosciences and Biotechnology Vol 4 No 1 (2016)
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University in cooperation with Asia-Oceania Bioscience and Biotechnology Consortium (AOBBC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (382.051 KB)

Abstract

This study aimed to determine the magnitude of the changes in carbon stocks due to changes in forest utilisation. Location of the study include planted forests, coffee plantations, mix garden, and cajuput region. The method used in this study was to estimate carbon stock based on the weight of biomass both above the surface and underground. Measurements were made on the biomass of trees and undergrowth, necromass (dead plant parts), both woody and non-woody (litter), and reserve C in the soil. The results showed that there were considerable differences of carbon stock in each area utilisation. The highest carbon stock found in the mix garden (275.62 tonnes/ha), then decrease at mahogany forest (269.63 tonnes/ha), planted forests (231.45 tonnes/ha), old cajuput (Melaleuca cajuput) (118.53 tonnes/ha), trimmed cajuput (86.57 tonnes/ha), coffee plantations (74.37 tonnes/ha), and un-trimmed cajuput (56.78 tonnes/ha). The recommendation can draw out in this research are: ( 1 ) In the area of coffee planting, horticultural forestry can be developed in the form of rows of plants among the coffee plants and ( 2 ) cajuput planting can be done with the system surjan and each row of cajuput consists of 2 rows with a distance planting more tightly.
EVALUATION OF LAND SUITABILITY FOR INCREASING PRODUCTIVITY IN DEGRADED UNDA WATERSHED, DISTRICT OF KARANGASEM, BALI Ni Made Trigunasih; I Nyoman Merit; Wiyanti Wiyanti; I Wayan Narka; I Nyoman Dibia
International Journal of Biosciences and Biotechnology Vol 5 No 1 (2017)
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University in cooperation with Asia-Oceania Bioscience and Biotechnology Consortium (AOBBC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (491.469 KB) | DOI: 10.24843/IJBB.2017.v05.i01.p03

Abstract

Evaluation of land suitability to increase the productivity of degraded lands in the Unda watershed aims: providing a database of land suitability for land use planning in support of sustainable agricultural development, providing spatial information, and recommendations in accordance with the land use plan of inhibiting factors that exist. Identification of characteristic land quality evaluation survey carried out by the method of land with exploration area of research followed by soil sampling at some sample of land units. Land suitability classification using the criteria of the Technical Guidelines for Evaluation of Land For Agricultural Commodities of Soil Research Institute (2003) is by matching between the haracteristics of the land with the requirements of growing plants was evaluated. Types of agricultural crops that are evaluated include plantation crops and food crops hotikultura fruits. Suitability actual land (land suitability based on survey data) are mostly classified as unsuitable (N), and marginally suitable (S3). Qualities/characteristics as the land that is the main limiting factor, among others: quality of land erosion, slope, water availability, temperature, rooting media (soil texture and coarse material). Sustainable land use planning can be recommended with agroforestry, accompanied by vegetative conservation measures because it is cheaper and easier to be carried out by farmers. Recommended cultivation effort is a combination of timber plants with horticultural crops of fruits with the provisions of at least 40% must be enclosed timber. Plant timber that can be developed between the other plants that are not too heavy canopy.
Co-Authors AGUS FRENCA ADI PUTRA ANGGIA WIDYA FATAHILLAH DEBORA TIENCICIA NAPITU DICKY ARDIYAN NUGROHO PUTRA FIRDA ARFIANA I MADE ADI SURYADI I Nyoman Dibia I NYOMAN MERIT I NYOMAN SUNARTA I Wayan Diara I WAYAN NARKA INDAYATI LANYA Jeksen, Julianus Ketut Dharma Susila Made Antara Moh Saifulloh NI KOMANG HARI PADMAYANI NI LUH AYU DANA LESTARI NI MADE DWI PRADNYASARI NI MADE TRIGUNASIH Ni Nengah Soniari PUTU SINTAYANI BUANA R. Suyarto RIO PUTRA NUSANTARA PARDEDE TATIEK KUSMAWATI WINDA ARDY DWIASTUTI Yoga Yuniadi