SciELO - Scientific Electronic Library Online

 
vol.69 issue2Location and Classification of Moving Fruits in Real Time with a Single Color CameraPrediction of the Composition of Fresh Pastures by Near Infrared Reflectance or Interactance-Reflectance Spectroscopy author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Chilean journal of agricultural research

On-line version ISSN 0718-5839

Abstract

Effect of Quantity and Distribution of Rainfalls on Hordeum murinum L. Growth and Development. Chilean J. Agric. Res. [online]. 2009, vol.69, n.2, pp.188-197. ISSN 0718-5839.  http://dx.doi.org/10.4067/S0718-58392009000200008.

The growth and development of Hordeum murinum L. seeds growing with extreme pluviometric regimes in cool greenhouse conditions were evaluated. Seven treatments according to quantity and distribution of real rainfalls of the semiarid zone of the Metropolitan Region, Chile were applied: rainy-late, normal-late, dry-early, rainy-normal, normal-early and dry-late, plus a reference without water stress, at 2/3 field capacity. The experimental design was randomized complete blocks with five replicate pots. Seeds produced in the last year were sown in pots with disinfected soil leaving the more uniform plants after emergence. Evaluations were made of phytomass production, spearing shoots of roots, the quantity of floral stems and seeds, their total weight and the proportion of seed annex structures, and the viability and germination capacity of seeds. The life cycle of dry years was shortest and with the least dry shoot matter production, the rainy-normal and normal-late years had similar dry root matter production, therefore the most important factor was rainfall distribution. All the reproductive growth values were lower than the reference. There was no seed production in both distributions of dry years and in the normal-early. There were only differences in late distributions, there were no differences among treatments in seed quality. Thus, H. murinum uses its resources principally for seed production and late distributions determined seed production.

Keywords : pluviometric regime; reproductive efficiency; naturalized poacea.

        · abstract in Spanish     · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License