ANALYSIS OF WATER BALANCE ON SOYBEAN CULTIVATION (Glycine max [L] Merr.) IN DRY LAND

Authors

  • Oktaviani -
  • Sugeng Triyono
  • Nugroho Haryono

Abstract

ABSTRACT

Soybean is one important food crop in Indonesia after rice and corn. In 2008 to 2010, the amount of soybean harvest has fluctuated. One effort to increase the soybean yield is by using the expansion programs to exploit dry lands. However, water scarcity is the main problem faced in dry land cultivation.  For this reason, study on optimalization of water use become very important and potential of water harvesting is needed to be explored.  This study aimed to analyze and to partition the water balance at soybean cultivation, and also to explore the potential of rainwater harvesting.  The experiment was conducted at the Integrated Field Laboratory of the College of Agriculture, University of Lampung from 15 October 2011 to 6 January 2012.  The observations were carried out by constructing 8 plots, 2x1 m2 each, and in a longitudinal direction of the 5-6% slope.  Four of the experimental plots were sealed with plastic liner and another four pots were left without liner.  Each plot was equipped with a 1x0,5x0,5 m3 water storage pond at the down end of the plot.  Physical properties were determined at the beginning experiment; while rainfall, soil moisture, and water surface of the ponds were monitored evey day.  Soybean yield was weighed at the harvest time. The results showed that water balance could be divided into input and output.  Water input was partitioned into rainfall 41,56% and irrigation 58,44%.  Water output was partitioned into runoff 6,76%, percolation 13,74%, evapotranspiration 74,35%, moisture stored in the soil 0,20%, and irrigation surcharge 5,04%.  Irrigation efficiency was found about 91%, while rainwater harvested contributed 20,74% of the irrigation total.  Potential of productivity was found to be 3,3 ton soybean yield per ha, and potential water use productivity was about 0,74 kg soybean per m3 irrigation water.

 

Keywords: evapotranspiration, soybean, surface runoff, water balance, water harvesting.

Downloads

Published

2013-05-08

Issue

Vol. 2 No. 1 (2013)

Section

Articles

License

    1. Authors who publish with this journal agree to the following terms:

        1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution-ShareAlike 4.0 International Lice that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
        2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
        3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

        4. Jurnal Teknik Pertanian Lampung

          Creative Commons License
          JTEPL is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.