Pengaruh Pemberian Probiotik EM4 dengan Dosis Berbeda terhadap Kelangsungan Hidup Larva Ikan Badut (Amphiprion percula)

Ikan badut (Amphiprion percula) merupakan ikan hias air laut bernilai ekonomi tinggi. Kendala pada budidaya ikan badut adalah rendahnya kelangsungan hidup larva. EM4 (Effective Microorganisme 4) merupakan jenis probiotik komersial yang dapat memperbaiki kualitas air. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian probiotik EM4 dengan dosis berbeda terhadap kelangsungan hidup larva ikan badut. Penelitian dilaksanakan pada bulan Oktober-Desember 2012 di Balai Besar Penelitian dan Pengembangan Budidaya Laut Gondol Bali. Larva yang digunakan sebagai hewan uji yaitu larva berumur 2 hari. Rancangan percobaan  menggunakan Rancangan Acak Lengkap (RAL) satu faktor yang terdiri dari 5 perlakuan yaitu dosis probiotik 4 mg/l (P1), 8 mg/l (P2), 12 mg/l (P3), 16 mg/l (P4), tanpa probiotik/kontrol (P5) dan setiap perlakuan diulang 3 kali. Hasil penelitian menunjukan bahwa, probiotik EM4 dengan dosis berbeda tidak berpengaruh nyata (p>0,05) terhadap kelangsungan hidup dan panjang akhir larva namun berpengaruh nyata (p<0,05) terhadap  berat akhir larva. Dosis probiotik 8 mg/l menghasilkan nilai rata-rata panjang akhir dan berat akhir akhir tertinggi (0,017 g)

A molecular basis for, and the alleviation of water-repellency in soils

Thesis (Ph.D.)--University of Adelaide, Dept. of Soil Science, 198

PENGGUNAAN INDEKS OSILASI SELATAN UNTUK MEMPRAKIRAKAN SIFAT HUJAN MUSIMAN GUNA MENENTUKAN STRATEGI TANAMAN DI LAHAN TADAH HUJAN DI PULAU LOMBOK SHOUTHERN OSCILLATION INDEX FOR FORCASTING SEOSONAL RAINFALL CHARACTERISTIC TO DETERMINE UPLAND ...

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Wheat (Triticum aestivum) Adaptation to Lombok Island Indonesia

Wheat is a temperate crop; therefore, effort is needed in adapting it to tropical areas. Lombok Island is suggested to be a potential wheat growing area. To investigate the feasibility of wheat production on Lombok and the adaptation of wheat to the current cropping systems, field experiments were carried out at six sowing times in 2010 and three sowing times in 2011 at three different sites up to 1000 meters above sea level (m asl) to represent low, medium and high elevation areas. Eight Australian and two Indonesian wheat varieties were selected to represent a range in maturity types. Six sowing dates in 2010 were arranged two weeks apart, from 19 April to 27 June, and three sowing time in 2011 were from 20 May to 19 June. Plant development was rapid at this continuously high temperature environment with flowering occurring 40-70 days after sowing (DAS). Wheat productivity was influenced by elevation and sowing date, at lowland, yields were about 1 t ha-1 or less, whereas at 500 m asl and above ranged from 2-3 t ha-1. Mid-season varieties were higher yielding than earlier or later flowering varieties. The optimum sowing time was from mid-May to early-June

Soil management systems improve water use efficiency of rainfed rice in the semi-arid tropics of southern Lombok, Eastern Indonesia

Rice (Oryza sativa) grown on rainfed Vertisols in the semi-arid tropics of southern Lombok, Eastern Indonesia, is usually flooded in the short wet season, creating a considerable demand for water. However, rice crops and secondary crops frequently suffer from water stress as the soil dries after the wet season. Four systems of soil management for rice were studied at Wakan and Kawo, with average annual rainfalls of 984 mm and 1665 mm respectively. The objective was to improve water use efficiency (grain yield/m3 water consumed). The four systems were unflooded permanent raised beds with tillage (RMT) or without tillage (RNT), and flooded flat land with tillage (FMT, the conventional system, gogorancah), or without tillage (FNT). Water was kept at 0.1 m depth in the furrows (RMT, RNT) or at 0.05 m depth on flat land (FMT, FNT). Excess water was collected in a dam (embung), and used when necessary to keep the water at the desired depth. Compared with FMT, RNT reduced crop water requirement for rice by 50% at Wakan and by 44% at Kawo. Water use efficiency in RNT was increased by 90% at Wakan, and by 56% at Kawo, compared with that in FMT. There were no differences between treatments in the yield of rice at Kawo (4.5 t/ha), but at Wakan yield was better in FMT or FNT (4.2 t/ha) than RMT or RNT (2.8 t/ha). Hence, on rainfed Vertisols of Southern Lombok, rice grown on permanent raised beds, with or without tillage, could successfully replace rice grown under the conventional flooded system with tillage on flat land (gogorancah), where the rainfall is higher. The extra water saved with permanent raised beds could be used to irrigate secondary crops

Seasonal climate forecasting for better irrigation system management in Lombok, Indonesia

This project aimed to develop, customise and promote seasonal climate forecast (SCF) technologies to improve the management of irrigated agricultural production systems in Lombok, Indonesia. The climate of Lombok is highly variable being significantly influenced by the El Niño Southern Oscillation (ENSO) phenomenon, which greatly affects the productivity of the predominantly rice-based local agriculture. By customising ENSO-based SCF technologies for use in regional agricultural management and planning, there is significant potential to increase Lombok's agricultural productivity and revenue in favourable seasons and reduce the risk of crop losses in dry years and prolonged droughts. To achieve this, the objectives of the project embodied a range of decision support and 'systems modelling' development, capacity-building and information dissemination components including: • Collecting, synthesising, modelling and collating hydrologic and climatic data for integration into a climate-based decision support system. • Developing decision support tools for optimising choice of crop, crop area and irrigation water allocation based on seasonal climate information. • Promoting SCF-based planning amongst irrigators, government officials and community leaders. • Building local capacity in the development and operational use of decision support systems