Volume 1, Number 1 (2-2013)                   DEEJ 2013, 1(1): 21-30 | Back to browse issues page


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Abstract:  

Management and control of poisonous and allelopathic plant species are from the main
priorities for restoration of range and desert ecosystems. In a glasshouse experiment, seeds of
Agropyron desertorum, a perennial forage grass, were sown within the soil media containing
different proportion of shoots (0, 5% and 20%) and root powder, or soil taken from the under
canopy of harmal plant. Experiment was conducted in a completely randomized design with 6
treatments and four replications. Seed germination rate and speed, and seedling
morphological growth parameters of Agropyron were measured. Under the canopy of harmal
plant soil pH (8.13) and texture (sandy loam) was similar to those in open areas, however the
electrical conductivity was higher under the canopy (627 vs. 215). A mixture of 20% shoot
powder (seed and fruit )and rangeland soil, significantly reduced germination rate and speed,
and all growth parameters of Agropyron. Root powder and understory soil treatments did not
induced negative effects, they even increased shoot weight of the target plant.According to
our results applying a surface root plow, before the flowering stage of harmal plant, may
positively increase establishment of Agropyron in the field.

Type of Study: Applicable | Subject: Special
Received: 2012/05/24 | Accepted: 2012/10/26 | Published: 2013/02/3

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