Soil management systems improve water use efficiency of rainfed rice in the semi-arid tropics of southern Lombok, Eastern Indonesia

Mahrup, Borrell, Andrew, Ma'shum, Mansur, Kusnarta, IGM, Sukartono, Tisdall, Judy and Gill, Jaikirat S. (2005). Soil management systems improve water use efficiency of rainfed rice in the semi-arid tropics of southern Lombok, Eastern Indonesia. In: 5th Asian Crop Science Conference (5ACSC), Brisbane, Australia, (342-344). 26 September - 1 October 2004. doi:10.1626/pps.8.342


Author Mahrup
Borrell, Andrew
Ma'shum, Mansur
Kusnarta, IGM
Sukartono
Tisdall, Judy
Gill, Jaikirat S.
Title of paper Soil management systems improve water use efficiency of rainfed rice in the semi-arid tropics of southern Lombok, Eastern Indonesia
Conference name 5th Asian Crop Science Conference (5ACSC)
Conference location Brisbane, Australia
Conference dates 26 September - 1 October 2004
Journal name Plant Production Science   Check publisher's open access policy
Place of Publication Sendai, Japan
Publisher Crop Science Society of Japan
Publication Year 2005
Sub-type Fully published paper
DOI 10.1626/pps.8.342
Open Access Status DOI
ISSN 1343-943X
1349-1008
Volume 8
Issue 3
Start page 342
End page 344
Total pages 2
Language eng
Formatted Abstract/Summary
Rice (Oryza sativa) grown on rainfed Vertisols in the semi-arid tropics of southern Lombok, Eastern Indonesia, is usually flooded in the short wet season, creating a considerable demand for water. However, rice crops and secondary crops frequently suffer from water stress as the soil dries after the wet season. Four systems of soil management for rice were studied at Wakan and Kawo, with average annual rainfalls of 984 mm and 1665 mm respectively. The objective was to improve water use efficiency (grain yield/m3 water consumed). The four systems were unflooded permanent raised beds with tillage (RMT) or without tillage (RNT), and flooded flat land with tillage (FMT, the conventional system, gogorancah), or without tillage (FNT). Water was kept at 0.1 m depth in the furrows (RMT, RNT) or at 0.05 m depth on flat land (FMT, FNT). Excess water was collected in a dam (embung), and used when necessary to keep the water at the desired depth. Compared with FMT, RNT reduced crop water requirement for rice by 50% at Wakan and by 44% at Kawo. Water use efficiency in RNT was increased by 90% at Wakan, and by 56% at Kawo, compared with that in FMT. There were no differences between treatments in the yield of rice at Kawo (4.5 t/ha), but at Wakan yield was better in FMT or FNT (4.2 t/ha) than RMT or RNT (2.8 t/ha). Hence, on rainfed Vertisols of Southern Lombok, rice grown on permanent raised beds, with or without tillage, could successfully replace rice grown under the conventional flooded system with tillage on flat land (gogorancah), where the rainfall is higher. The extra water saved with permanent raised beds could be used to irrigate secondary crops.
Keyword Evaporation
Paddy
Precipitation
Water requirement
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Conference Paper
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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Created: Mon, 07 Mar 2011, 14:47:34 EST