Showing 2 results for Galavi
A Jalali, M Galavi, A Ghanbari, M Ramroudi, M Yousef Elahi,
Volume 14, Issue 52 (sumer 2010)
Abstract
Using treated wastewater led to increasing crop yield, but it may causes heavy metals accumulations and also their toxicity in soil and plant. In order to investigate the effects of wastewater on yield, forage yield components, and heavy metals concentrations in stem and leaf of sorghum, an experiment was conducted in the agricultural Research Institute of Zabol University in 2006-2007, using a randomized complete block design with four replication. The irrigation treatments were: 1) well water for whole growing season as control (T1), 2) well water for all growing season along with NPK application (T2), 3) wastewater during the first half of growing season (T3), 4) wastewater during the second half of growing season (T4), 5) wastewater and tapwater alternately (T5) and 6) wastewater for whole growing season (T6). The results showed that irrigations with wastewater and well water alternately and wastewater for whole growing season produced the maximum forage yield and the maximum heavy metal accumulation in plant organs observed by irrigation with wastewater for hole growing season, and wastewater and well water alternately. There was significant increase between T5 and T6 relative to control and other treatments. The elements concentration such as Cu, Pb and Fe in leaf was more than stem, but Zn and Ni concentration in stem were more than leaves. There were no significant differences for Mo and Cr concentration between stem and leaf. Forage yield in T6 and T5 relative to T2 were increased 38.96 and 51.95 percent respectively. In all irrigation treatments the amount of elements and heavy metals in sorghum were lower than standard limits. Based on the results, alternative irrigation method (T5) is recommended for forage sorghum production.
H. R. Fanaei, M. Galavi, M. Kafi, A. Ghanbari Bonjar, A. H.shirani-Rad,
Volume 15, Issue 57 (fall 2011)
Abstract
In order to assess the effect of drought stress and various levels of potassium on solutes accumulation and chlorophyll of canola and Indian mustard, a field experiment was conducted in a factorial design based on randomized complete block design with three replications including three irrigation regimes (I1=irrigation after 50% depletion of soil water(control),I2 =irrigation after 70% water depletion and I3 =irrigation after 90% water depletion), two species (Hyola 401 hybrid of canola and landrace cultivar of mustard) and three levels of potassium fertilizer (K1=0 ,K2=150 and K3= 250 kg.ha-1 K2SO4 ) at Agricultural and Natural Resources Research Center of Sistan in 2008-2009 cropping season. Water stress increased proline and soluble carbohydrate accumulation in the leaves of Brassica sp. In non stressed condition (control) in different growth stages, proline was lower than water-stressed plants and Leaf proline content decreased significantly after irrigation. Mustard landrace showed higher capability for accumulating assimilates such as proline, soluble carbohydrates and potassium than hybrid Hyola 401. Water stress decreased the amount of chlorophyll a, b and total leaf chlorophyll, but Potassium application caused an increase in the mentioned parameters. The highest content of chlorophyll pigments was observed at flowering stage. Potassium application caused a decrease in proline and an increase in soluble carbohydrates concentration in the leaf under water stress condition. There was a negative correlation between grain yield and proline content and soluble carbohydrates, but grain yield was positively correlated with chlorophyll, a, b. It was concluded that osmotic adjustment can be an important mechanism for Brassica species under water stress conditions and that organic and inorganic compounds such as proline, soluble carbohydrates and potassium play key roles in this regard.
