Evaluation for the Applicability of Sprinkle Big Gun BIR-1 and Gravitation Irrigation Systems for Watering Food Crops in Two Different Conditions of Dryland in Lombok Island Indonesia1

Suwardji, Suwardji and Priyono, Joko and M. Sidik, M. Sidik (2018) Evaluation for the Applicability of Sprinkle Big Gun BIR-1 and Gravitation Irrigation Systems for Watering Food Crops in Two Different Conditions of Dryland in Lombok Island Indonesia1. S3 thesis, upt. perpustakaan.

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Abstract

A field trial was conducted to identify appropriate irrigation system/s for watering food crops grown on two different conditions of dryland in North and East Lombok Indonesia. The trial sites were in Akar-Akar Vilage (North Lombok) with sandy textured soil, highly permeable, and low water repellent soils and compared with silty loam, impermeable, and high water repellent soils in Pringgabaya (East Lombok). Two irrigation systems, i.e., sprinkle big gun (BG) and gravitation (Gv) systems, were applied in both sites for watering corn and peanut (local var.). Crop yields, irrigation water requirement (IWR), and crop-irrigation water use efficiency (IWUE) were identified. Results in Akar-Akar indicated that the values of IWUE by using BG were 7,92 kg corn/mm/ha and 1.34 kg peanut/mm/ha, which were much lager than those for using Gv (0.34 kg corn/m/ha and < 0.1 kg peanut/ha/mm). The lower values were mainly due to much of irrigation water supplied by using Gv percolated into sub soil - bellow rooting zone. Experiment in Pringgabaya indicated contrast results in which BG system was not an appropriate method for watering the crops grown in this site. The IWUE values for those crops watered by using BG respectively were 2.58 kg corn/ha/mm and 1.37 kg peanut/ha/mm, which were much smaller than those for by using Gv, i.e, 6.89 kg corn/ha/mm and 3.26 kg peanut/ha/mm. That was, due to high water repellency of the soil, causing more of water supply by BG system was evaporated than absorbed by soil or crops. Results of this study suggested that soil properties clearly affected the applicability of irrigation system for growing food crops on dryland. Sprinkle big gun irrigation system was appropriate system for watering food crops on highly permeable sandy soils, whereas gravitation irrigation system was for that on impermeable or/and high water repellent sandy soils.

Item Type: Thesis (S3)
Keywords (Kata Kunci): sandy soil of dryland, irrigation systems, sprinkle big gun, irrigation water requirement, water use efficiency
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian
Depositing User: Wiwin Kartikawati
Date Deposited: 28 Mar 2018 09:13
Last Modified: 28 Mar 2018 09:13
URI: http://eprints.unram.ac.id/id/eprint/1778

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