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All Journal Agrotrop : Journal on Agriculture Science Bumi Lestari E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology)
I GUSTI NGURAH SANTOSA
Program Studi Agroekoteknologi Fakultas Pertanian Universitas Udayana
Agriculture, Biological Sciences & Forestry Humanities Earth & Planetary Sciences Energy Environmental Science

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DAMPAK ALIH FUNGSI LAHAN SAWAH TERHADAP PEMANFAATAN SUMBERDAYA AIR UNTUK MENUNJANG KETAHANAN PANGAN I Gusti Ngurah Santosa; Gede Menaka Adnyana; I Ketut Kartha Dinata; I Gusti Alit Gunadi
Bumi Lestari Journal of Environment Vol 10 No 2 (2010)
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

Land and water resources are important roles to keep the sustainability of food production. However, these resources tend to decrease because of developing infrastructure as well building, road, industry, tourism, property, etc. In two decades, it was predicted that land farm alleviation in Indonesia was about 10,000 ha per year. On the other side, food demand tended to increase because of population growth. Consequently, study has to be done to get some information about land area, irrigation facilities, and crops production. The location of the study on one unit area of irrigation, named Daerah Irigasi (DI) Mambal. This study was conducted by survey and field experiment on rice package technology. Survey method was done by interview and literature study. The field experiment was done by some modified input i.e. younger seedling, minimum dosage of complete fertilizer, and minimum water irrigation. These treatments were compared to farmer’s technology, and the result was analyzed by t test. The result of the study revealed that the land alleviation was 38.17% (4,280 ha to 2,980 ha) in a period of 30 years at DI Mambal and the land alleviation at Subak Sempidi was 26% (135 ha to 99 ha) in a period of 24 years. The supply of irrigation water debit at DI Mambal decreased 15% (from 3,596 l/sec to 3,038 l/sec) in a period of 30 years. On the other hand, the supply of irrigation water debit at Subak Sempidi increased 26% (from 168 l/sec to 212 l/sec) from 2005 to 2008. As a final point, supply of irrigation water debit increased from 1.70 l/sec/ha on 2005 – 2007 to 2.14 l/sec/ha on 2008. Paddy yield on experiment of technology package was 12.39 ton of dry grain harvest and it was 11.47 ton of dry grain harvest by the farmer’s technology. From the result of the study was suggested that technology package have to be done by two or three times of cultivation to identify the stability of each harvest yield.
Pengaruh Jumlah Bibit dan Pupuk Organik terhadap Pertumbuhan dan Hasil Tanaman Padi (Oryza sativa L.) IVAN MATHEUS NAINGGOLAN; GEDE WIJANA; I GUSTI NGURAH SANTOSA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.6, No.3, Juli 2017
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

The Effect of Number of Seeds and Organic Fertilizer on the Growth and Yield of Rice (Oryza sativa L.) This research aims to determine the effect of the number of seedling and organic fertilizers solid and liquid on the growth and yield of rice plants. The research was conducted on March 18 - July 3 2016 at the Greenhouse Garden Experiments Faculty of Agriculture, University of Udayana, Denpasar. The research method is a pattern of split plot using randomized block design consists of two factors: the main plot (organic fertilizer) and subplot (use the number of seeds). The main plot consisted of two levels are solid organic fertilizer and liquid organic fertilizer. Subplot consisted of three levels and 1 , 3, and 5 seedlings per hole. The data were analyzed using analysis of variance with Costat program. Results of statistical analysis showed that one interaction between the use of the number of seedling and organic fertilizers no real effect on the variables tested. The number of seedling treatment use did not significantly affect to the growth and yield, except the total number of tillers. Treatment of solid organic fertilizer is better than liquid organic fertilizer on the growth and yield of rice. Dry grain yield per harvested and oven dried clumps on the use of solid organic fertilizer is higher, at 22,69 g and 14,85 g, compared to using liquid organic fertilizer 15,11 g and 8,19 g. Associated with the use of the number of seeds is recommended to use the number of seeds one per hole, but for the implementation in the field required further research.
Kesesuaian Kualitas Air Irigasi untuk Padi Sawah di Daerah Irigasi Mambal I GUSTI NGURAH SANTOSA; I PUTU DHARMA
Agrotrop : Journal on Agriculture Science Vol 9 No 1 (2019)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (297.349 KB) | DOI: 10.24843/AJoAS.2019.v09.i01.p09

Abstract

Suitability of Irrigation Water Quality for Rice in Mambal Irrigation Area. Mambal irrigation area is located in southern region of Bali, close by urban area. It consists of 42 Subak which covered 4.820 ha. However, the total area that still exists today is only 2.978 ha, and it is considered potential in increasing rice production and supplying rice in order to support food self-sufficiency in Bali. The increase of population is considered as the factor of wetland conversion because, the growth of population leads to variety of purposes such as shelter (housing), tourism/hotel, accommodation, business/home industry, livestock, public facilities, etc. Therefore, the activities done on the wetland conversion area automatically changed. That activity on conversion area consequences in both liquid or solid waste, and it is often discharged into rivers or irrigation channels. Consequently, it may cause irrigation water pollution. Poor quality of irrigation water can endangering rice plant growth and reduce the production, which means blocking or inhibiting food self-sufficiency. This study is considered as field and laboratory research. There are some field activities done, namely observation of the pollution sources and types of pollutants, as well as waste disposal mechanisms and technologies used to tackle pollution. In order to determine the quality of irrigation water, the water samples taken in the primary channel (1 water sample), secondary channel (1 water sample), tertiary channel (1 water sample), and field area (3 samples of water). All water samples are analyzed at the Analytical Laboratory of Udayana University. The results of the study are the sources of pollution come from channel natural environments, public facilities, housing and household waste. It was found that there are some types of waste, namely natural garbage, artificial garbage, liquid or solid waste in small amount. The mechanism of waste disposal is done conventionally and there is no application of technology of waste disposal. The outcome of the study is irrigation water quality for rice is still suitable for irrigation.
THE ROLE OF IRRIGATION MANAGEMENT IN INCREASING RICE PRODUCTION IN SOUTH KOREA I GUSTI NGURAH SANTOSA; CHANG JAEWOO
Agrotrop : Journal on Agriculture Science Vol 1 No 1 (2011)
Publisher : Fakultas Pertanian Universitas Udayana

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Abstract

Increasing of rice production is one of a highlight program in South Korea. In order to support this, enough water supply for paddy field is one of determined main factors to maintain good plant growth and high yield. Water from the rainfall is usually not enough for paddy field, so it must be supplied from irrigation system. The water source for irrigation can be derived from surface water and or ground water which is usually located in long distance, consequently it needs irrigation facilities to deliver water until reach paddy field area. Therefore government, and, or farmer need to manage irrigation to fulfill paddy field water requirement and they have been doing it. By working hard and holding strong commitment, South Korea has been reaching rice self sufficiency average 98,9% since 1970s for 38 years period. Average rice yield was 5.20 ton per ha in 2008 and this indicates as the highest level of rice yield in the world as well. Based on this reality, it needs to be studied the role of irrigation management in increasing rice production in South Korea. It was found that irrigation management in South Korea has very important role and it has significant effect in increasing rice production. This reality was supported by increasing of safety paddy field area by year. The water potential developed and to be developed is higher than water use. Government provided K Water (Korea Water Resources Cooperation) to handle everything in relation to water problem.
Co-Authors CHANG JAEWOO Gede Menaka Adnyana Gede Wijana I GUSTI ALIT GUNADI I Ketut Kartha Dinata I NYOMAN RAI I PUTU DHARMA IDA AYU ASTARINI IVAN MATHEUS NAINGGOLAN Ni Putu Anom Sulistiawati, Ni Putu Anom