Evaluation of Crop Coefficients from Water Consumption in Paddy Fields

Jurnal Irigasi

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Title Evaluation of Crop Coefficients from Water Consumption in Paddy Fields
Evaluasi Koefisien Tanaman Padi Berdasarkan Konsumsi Air pada Lahan Sawah
 
Creator Sofiyuddin, Hanhan Ahmad
Martief, Lolly M.
Setiawan, Budi Indra
Arif, Chusnul
 
Subject paddy field; crop coefficient; SRI; ICM; water saving; water productivity
sawah; koefisien tanaman; SRI; PTT; penghematan air; water productivity
 
Description Crop coefficient was calculated based on the observation of water consumption of various treated paddy fields on the objective to find its changes with time as the plant grew. Three principal techniques of paddy fields known as System of Rice Intensification, Integrated Crop Management and commonly practiced were investigated. Each of them has major different in irrigating and planting patterns, which lead to different performance on plant growth, productivity and water consumption. In this study, the combinations of irrigating and planting patterns across these 3 systems investigated. Measurements were conducted in daily basis on water level, perched water table, irrigation water, drainage water and weather parameters. Water balance analysis was carried out to calculate equivalent depth of soil water storage, which was then compared with measured soil water storage based on water level data and soil water retention curve. The results showed that each treatment produced similar crop coefficients. Average crop coefficient in 15 days periods are 0,87, 1,03, 1,13, 1,24, 1,28 and 1,25. These values are important to understand more about water saving mechanism as an input to develop irrigation discharge planning standard.
Koefisien tanaman dihitung berdasarkan pengamatan konsumsi air dari berbagai lahan sawah untuk mengetahui nilai dan variasi temporal sepanjang waktu pertumbuhan. Penelitian ini mengkaji tiga metode di lahan padi sawah, yaitu System of Rice Intensification, Pengelolaan Tanaman Terpadu dan metode yang biasa digunakan oleh petani (konvensional). Setiap metode memiliki perbedaan mendasar dalam pola perawatan tanaman dan pola pemberian air yang lebih lanjut menyebabkan perbedaan dalam hal pertumbuhan tanaman, produktivitas dan konsumsi air. Dalam penelitian ini, kombinasi pola perawatan tanaman dan pemberian air dari ketiga metode ini diujicobakan. Pengukuran dilakukan harian pada parameter tinggi genangan, tinggi muka air tanah lahan, irigasi, drainase serta parameter klimatologi. Analisa neraca air kemudian dilakukan untuk menghitung kedalaman ekuivalen simpanan air tanah, yang kemudian dibandingkan dengan data simpanan air tanah hasil pengukuran berdasarkan data tinggi muka air dan kurva retensi air tanah. Proses optimasi kemudian dilakukan untuk menemukan koefisien tanaman harian dengan meminimalisasi perbedaan kumulatif antara kedalaman tanah hasil analisa dan pengukuran. Hasil penelitian menunjukkan bahwa setiap perlakuan menghasilkan koefisien tanaman yang hampir sama. Nilai rata-rata pada periode 15 harian secara berurutan adalah 0,87, 1,03, 1,13, 1,24, 1,28 and 1,25. Nilai ini sangat penting dalam memahami mekanisme penghematan air sebagai masukan bagi penyusunan standar perencanaan debit irigasi.
 
Publisher Balai Penelitian dan Pengembangan Irigasi
 
Contributor

 
Date 2019-02-13
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion


 
Format application/pdf
 
Identifier http://jurnalirigasi_pusair.pu.go.id/index.php/jurnal_irigasi/article/view/253
10.31028/ji.v7.i2.120-131
 
Source Jurnal Irigasi; Vol 7, No 2 (2012): Jurnal Irigasi; 120-131
Jurnal Irigasi; Vol 7, No 2 (2012): Jurnal Irigasi; 120-131
2615-4277
1907-5545
 
Language ind
 
Relation http://jurnalirigasi_pusair.pu.go.id/index.php/jurnal_irigasi/article/view/253/317
 
Rights Hak Cipta (c) 2012 Jurnal Irigasi
 

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