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All Journal Agromet Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Megasains
Saputra, Rizky Armei
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Engineering

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Analysis Rice Field Drought Potential using the Standardized Precipitation Index (SPI) Method Yusman, Rival Doli; Irsyad, Fadli; Arlius, Feri; Saputra, Rizky Armei; Yanti, Delvi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.494-505

Abstract

Drought analysis can be used as an early warning of drought in rice fields, which can be identified by connecting various parameters. This study aims to identify the potential for rice fields vulnerable to drought in Agam Regency. Drought is primarily caused by uneven rainfall distribution, leading to imbalanced hydrological conditions. This study used the last 30 years of rainfall data (1993 2022) from five stations located at Agam Regency (Canduang and Gumarang) and the rest outside of the study area (Padang Panjang, Suliki, and Paraman Talang). Spatial analysis of drought distribution was carried out using the Inverse Distance Weighted (IDW) method. The results showed the consistency test value of rainfall data for all five stations was obtained with an average of R² with a value of 0.992, the potential area of rice fields with a dry and very dry category was 13,640.61 ha and 904.55 ha, respectively. The conclusions of this study are (i) the districts with the most potential to be affected by drought (dry and very dry categories) are Tilatang Kamang and Malalak District, with an area of 2,058.15 ha and 750.48 ha, respectively, (ii) it is important to prepare the water shortage in the dry season by utilizing rivers, irrigation and reservoirs in the area. Keywords: Agam Regency, Drought Potential, Rain, Rice Fields, SPI.
Assessment of Rice Crop Water Requirements for Planting Season in Moderate Agroclimatic Area of West Sumatra Saputra, Rizky Armei; Yulianti, Via; Hermansah
Agromet Vol. 39 No. 1 (2025): JUNE 2025
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j.agromet.39.1.40-47

Abstract

In changing climate, uncertainty in rice production becomes more frequent leading to threat of food security. However, research on rice cultivation in the rainfed agricultural areas of West Sumatra remains limited. The objectives of the study are to analyze the crop water requirements of rainfed rice and to determine rice planting patterns. The study was conducted in a moderate agro-climate area of West Sumatra based on oldeman agroclimate zone that experienced changes in planting patterns. We used climate data for 1991 – 2020 obtained from TerraClimate, which were utilized for monthly water balance computation based on the Thornwhite and Matter approach. The analysis focused on four major rice production centers, namely: Panti in Pasaman, Lima Kaum in Tanah Datar, Luak in Lima Puluh Kota and Sijunjung. The results showed change in water deficit periods across the study sites have changed planting season. Based on our analysis site in Lima Kaum, Tanah Datar experienced the longest deficit period, which lasted 5 months from May to September. This situation may not suitable to plant rice throughout the year without additional irrigation. Further, adjusting to the secondary crop may be considered to optimize agricultural productivity. These findings can serve as a reference for determining planting seasons and improving water use and distribution strategies in rainfed agricultural systems.
Efek Perubahan Zona Agroklimat Oldeman Terhadap Pola Tanam Padi Sumatera Barat Saputra, Rizky Armei
Megasains Vol 9 No 1 (2018): Megasains Vol. 9 No. 1 Tahun 2018
Publisher : Stasiun Pemantau Atmosfer Global Bukit Kototabang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46824/megasains.v9i1.176

Abstract

Perubahan curah hujan telah menyebabkan perubahan zona klasifikasi agroklimat Oldeman serta berpengaruh terhadap pola tanam padi sawah tadah hujan di Provinsi Sumatera Barat yang merupakan salah satu sentra padi nasional. Penelitian ini bertujuan untuk mengetahui daerah atau kawasan sentra padi yang mengalami perubahan klasifikasi zona agroklimat Oldeman dan mengetahui daerah yang mengalami perubahan pola tanam serta memverifikasi kesesuaian pola tanam klasifikasi Oldeman dengan pola tanam aktual. Penelitian ini telah dilaksanakan di sentra padi Sumatera Barat. Data yang digunakan data curah hujan 1910-1941 dan 1985-2015 serta analisis perubahan zona agroklimat Oldeman. Zona agroklimat Oldeman 1977 dijadikan sebagai baseline.Penentuan perubahan pola tanam aktual dilakukan dengan survei lapangan untuk memperoleh informasi perubahan pola tanam padi aktual. Hasil penelitian ini menunjukkan terjadi perubahan zona agroklimat Oldeman pada lima kawasan sentra padi Sumatera Barat yaitu daerah Luak Situjuh, Rao, Sijunjung, Sukarami dan Lima Kaum. Luak Situjuh dari tipe B1 menjadi E1, Rao dari D2 menjadi C1, Sijunjung dari C1 menjadi D1, Sukarami dari A1 menjadi B1 dan Lima Kaum dari E1 menjadi menjadi E3. Lokasi yang mengalami perubahan pola tanam padi pada sawah tadah hujan yaitu Luak Situjuh, Panti dan Lima Kaum. Hasil verifikasi pola tanam aktual yang sesuai dengan pola tanam klasifikasi Oldeman terdapat pada empat lokasi yaitu Lubuk Basung, Sungai Dareh, Muara labuh dan Sukarami.
Co-Authors Arlius, Feri Fadli Irsyad Hermansah Yanti, Delvi Yulianti, Via Yusman, Rival Doli