Perencanaan Kebutuhan Air Tanaman Untuk Penjadwalan Irigasi pada Tanaman Jeruk (Citrus reticulata) di Desa Selorejo Menggunakan Cropwat 8.0.

Ardianita, Rifny (2015) Perencanaan Kebutuhan Air Tanaman Untuk Penjadwalan Irigasi pada Tanaman Jeruk (Citrus reticulata) di Desa Selorejo Menggunakan Cropwat 8.0. Sarjana thesis, Universitas Brawijaya.

Abstract

Irigasi adalah usaha penyediaan dan pengaturan air untuk menunjang pertanian yang jenisnya meliputi irigasi permukaan, irigasi bawah tanah dan irigasi pompa. Tujuan irigasi yaitu mengalirkan air secara teratur sesuai kebutuhan tanaman pada saat persediaan lengas tanah tidak mencukupi untuk mendukung pertumbuhan tanaman, sehingga tanaman bisa tumbuh secara optimal. Perencanaan irigasi yang tepat sangat diperlukan untuk peningkatan produktivitas tanaman. Kendala utama yang dihadapi petani Jeruk Keprok 55 Desa Selorejo adalah masalah ketersediaan air yang selama ini hanya mengandalkan hujan dimana air curahan hujan tidak menentu. Produktivitasnya menurun ketika musim kemarau panjang dikarenakan kekurangan air. Cuaca yang tidak menentu menyebabkan penurunan produktivitas jeruk sebesar 10% pada panen bulan Mei 2014. Metode penelitian yang digunakan yaitu deskriptif dengan pendekatan kuantitatif berdasarkan pengolahan data- data iklim, tanaman dan tanah menggunakan program aplikasi dan pengujian kinerja peralatan jaringan irigasi dilakukan dalam skala laboratorium. Penentuan kebutuhan air tanaman dan penjadwalan irigasi dapat disimulasikan dengan aplikasi perangkat lunak yaitu Cropwat 8.0. Program Cropwat 8.0 sangat membantu para ahli melakukan perhitungan dalam perencanaan dan pengelolaan suatu daerah irigasi. Perencanaan metode irigasi yang dipilih yaitu irigasi curah dengan kombinasi perlakuan tekanan pompa 1 bar, 2 bar, 3 bar dan tinggi pipa riser 50 cm, 100 cm dan 150 cm. Hasil penelitian menunjukkan bahwa kebutuhan air tanaman (ETc) tertinggi terjadi pada bulan Oktober periode ketiga sebesar 34.80 mm/tanaman dan terendah pada bulan Pebruari periode ketiga sebesar 19,70 mm/tanaman. Total kebutuhan air tanaman selama masa pertumbuhan adalah 971,90 mm/tanaman. Berdasarkan simulasi oleh Cropwat 8.0 irigasi hanya dilakukan pada musim kemarau yang dimulai pada bulan Mei dekade kedua hingga akhir Oktober dengan interval 10 harian sebagai air tambahan ketika kebutuhan air tanaman tidak bisa dipenuhi oleh air hujan. Kriteria pemberian air irigasi yaitu memenuhi kondisi 100% kapasitas lapang. Total kebutuhan irigasi sesungguhnya (netto) sebesar 330,76 mm/tanaman dan irigasi. kotor (gross) adalah 441,60 mm/tanaman dengan kebutuhan irigasi tertinggi sebesar 36,80 mm/tanaman pada akhir Agustus. Pengujian kinerja rancang bangun irigasi curah menghasilkan kombinasi perlakuan tekanan pompa dan tinggi riser yang optimal yaitu tekanan 2 bar dan tinggi riser 150 cm. Debit yang dihasilkan dari perlakuan tersebut yaitu 101,95 l/jam dengan jarak sebaran terjauh sebesar 4,51 m dan koefisien keseragaman pemberian air (CU) adalah 98,48%. Lama operasi jaringan irigasi curah bervariasi tergantung kebutuhan irigasi pada setiap periodenya

Item Type: Thesis (Sarjana)
Identification Number: SKR/FTP/2015/200/051504930
Uncontrolled Keywords: Cropwat 8.0, Irigasi Curah, Kebutuhan Air Tanaman, Penjadwalan Irigasi
Subjects: 600 Technology (Applied sciences) > 631 Specific techniques; apparatus, equipment materials > 631.5 Cultivation and harvesting > 631.58 Special methods of cultivation > 631.587 Irrigation / Sprinkler irrigation
Divisions: Fakultas Teknologi Pertanian > Keteknikan Pertanian
Depositing User: Budi Wahyono Wahyono
Date Deposited: 29 Jul 2015 10:11
Last Modified: 11 Feb 2022 06:51
URI: http://repository.ub.ac.id/id/eprint/150092
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