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Articles by M. Akbari
Total Records ( 2 ) for M. Akbari
  M. Akbari , H. Salehi and M. Khosh- Khui
  This investigation was conducted to compare Poa and Cynodon turfgrasses and their seed mixtures. In this research the turfgrasses Kentucky bluegrass (Poa pratensis L. ‘Merion’) and common bermudagrass (Cynodon dactylon [L.] Pers.), in monoculture or in mixtures of 0 to 100%, based on number of seeds, were used. Perennial ryegrass (Lolium perenne L. ‘Barball’) (L) was used as control. The seeds were sown in October in 2005 and 2006 in southwest Iran with a dry and moderate climate. The experiment was conducted in a split-plot design with year as main plot and turfgrass types as subplot. The cultures were maintained as lawns and were mowed from 3 cm above the ground. The turfgrasses were compared by measuring visual quality after winter and summer, chlorophyll index after winter and summer, rooting depth, verdure and root fresh weight, tiller density, and clippings fresh weight. Poa monoculture had high tiller density, root fresh weight and total fresh weight. Lolium monoculture had high rooting depth after winter and clippings fresh weight. Cynodon monoculture quality was poor with regard to many characters, mainly due to fall sowing. The seed mixture composed of 40% Cynodon+60% Poa was the best treatment and resulted in the highest verdure fresh weight, chlorophyll index after winter and summer, visual quality after winter and summer, and established a good turf according to the other characters. This mixture can be used as an alternative in overseeding programmes in areas with soil and environmental conditions similar to the present research site.
  H. Dehghanisanij , T. Yamamoto , M. Inoue and M. Akbari
  The scarcity of fresh water in arid and semi-arid regions (ASAR) makes saline water a valuable alternative water source for irrigation of agriculture crops, if we can improve the management of saline water to avoid its deleterious effects. Variables affecting soil water content (θw) and soil solute salinity (ECw), including time after irrigation and crop growth stages; early (ES), mid (MS) and late (LS) stages, were investigated at different radius from the emitter (lateral pipe). The simultaneous distribution of water and solute under drip irrigation was measured using Time Domain Reflectometry (TDR) method. The results indicated that θw and ECw increased in the order ES < MS < LS. The maximum θw and minimum ECw coincided at 10 cm radius from emitter (r10) during ES, MS and LS. The same trend applied for 20 cm radius from emitter (r20) during ES and MS. The ECw increased significantly in the order r10 < r20 < r30 during all crop growth stages. Time elapsed since irrigation was terminated till θw increased to a maximum level at the r10, during ES, MS and LS was 4, 3 and 3 h, respectively. It is therefore suggested that irrigation should commence 3 h before noon to coincide the maximum θw (minimum ECw) with maximum crop evapotranspiration (ETc). Interaction between θw and ECw for a given radius and different crop growing stages showed that the influence of θw on ECw was restricted to a small radius of about 20 cm from the emitter, which decreased further to only 10 cm during LS. Beyond this range, increasing θw was not enough to significantly affect ECw. The information obtained from this research is essential for the design, operation and management of saline water use with drip irrigation system in sand dune fields.
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