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Articles by Esmaeil Yasari
Total Records ( 5 ) for Esmaeil Yasari
  Esmaeil Yasari and A.M. Patwardhan
  A split-plot experimental design with nine treatments and a non-fertilizer application control plot in 4 replications was carried out during the 2004-2005 growing season, at the Baiecola Agricultural Research Station in the Mazandaran province of Iran. Canola (Brassica napus L.) was grown as a second crop in rotation after wheat and its seed yield, growth parameters (CGR, LAI, RGR and NAR), dry matter accumulation and HI was examined. N P K fertilizers together with S and Zn, singly or in combination were applied, before the sowing and after examining the soil requirement. The maximum yield (3141.250 kg h-1) and TDM (6498 kg h-1) and seed oil content (45.83%) were obtained at T10 (NPK Zn), coinciding with 203 pods/plant and 120.53 cm plant height. The application of NPKS at T9 resulted in the maximum seed protein (24.25%). Maximum LAI was recorded during 83 to 111 DAS period for all the treatments coinciding with the highest LAI value at T10 (4.8) which was followed up by the T9 and T8 having 4.61 and 4.56, respectively. The maximum value of CGR resulted at flowering (112-133 DAS) in which the T10, T9 and T8 showed the maximum value of CGR having 16.313, 15.770 and 15.373 (g m-2 day-1), respectively. The optimum LAI of canola plantation for the area in the study year was 4.26 which obtained at T10 during flowering. The RGR and NAR also were affected by the treatments, though not so much effective for RGR, the maximum NAR resulted at T9 quite resemble to those of T8 and T10 during the flowering stage.
  Esmaeil Yasari and A.M. Patwardhan
  To investigate the effects of inoculants (biofertilizer) and chemical fertilizer on the yield, yield components and seed oil content of canola (Brassica napus L.), a split-plot experimental design with 20 treatments in 4 replications was carried out during 2004-2005 growing season at the Baiecola Agricultural Research Station in the Mazandaran province, Iran. Canola (cv. Hyola 401 hybrid), a high yielding early maturity variety, was grown in rotation after wheat. In the main plots, the biofertilizer treatments were at two different levels: 1) control (no seed inoculation) and 2) seed-inoculation with a combination of three different strains of bacteria Azotobacter chrocooccum and Azosprillium brasilense and Azosprillium lipoferum. In the two sets of 10 sub-plots chemical fertilizers comprising N, P, K and their combinations, NPKS and NPK Zn were applied. The seed yield touched a high of 3741.5 kg h-1 at treatment T20 (Bio + NPK Zn), that corresponded to 257.7 pods per plant and maximum CGR (18.3 g m-2 day-1). The highest weight of 1000 seeds (4.45 g) was obtained at treatment no T19 (Bio + NPK S) which coincided with the maximum TDM (1155 g-2) and maximum LAI (5.06). The maximum branching (4.43 branches per plant) was obtained at treatment T20 (Bio + NPK Zn) showing a 46.2% increase over the control. The maximum oil content 47.73% was obtained at T16 (Bio + NK). The application of inoculation with Azotobacter and Azosprillium helped to increase the yield by 21.17% over the control, raised the number of pods per plant (16.05%), number of branches (11.78%), weight of 1000 grain (2.92%) and the oil content of seeds (1.73%) but decreased (-0.24%) the number of seeds per pod.
  Esmaeil Yasari , A.M. Esmaeili Azadgoleh , H. Pirdashti and Saedeh Mozafari
  In order to evaluate the effect of additional application of Azotobacter and Azospirillum inoculants (Biofertilizers) on canola (Brassica napus L.) yield and profitability, a split-plot experimental design with 20 treatments was carried out during 2004-2005 with four replications in the North of Iran. High yielding canola (cv. Hyola 401 hybrid), was grown in rotation after wheat. Two levels of biofertilizers as control and seeds inoculation in main plot and 10 treatments of chemical fertilizers comprising N, P, K and their combinations, NPKS and NPK Zn in sub plots were applied. The treatment T20 resulted in the maximum seed yield (3374 kg ha-1) coinciding with the maximum number of pods per plant (246 pods per plant) followed by the treatments T19, T18 and T15. Out of these 4 treatments, it was discovered that the highest net benefit of adding biofertilizers was observed at T15 (1.07 million rials.ha-1 = 117.7 $.ha-1). The research projects how the efficiency of these biofertilizers was maximum in presence of N and P fertilizers, while in the presence of K and Zn fertilizers at T20 it resulted mainly in the increase of fodder rather than seed. The seed N, protein and the oil percentage remained unaffected by biofertilizers application.
  Esmaeil Yasari , A.M. Patwardhan , V.S. Ghole , Ghasemi Chapi Omid and Asgharzadeh Ahmad
  A field experiment was conducted to evaluate the effect of different nutrients on canola (Brassica napus L.) growth parameters, nutrient uptake and ultimately on seed yield. For this purpose a split plot experimental design, with 10 treatments in 4 replications was carried out in 2004-2005, in silt-clay soil at Baiecola Agricultural Research Station, Mazandaran Iran. Canola seed yield, growth parameters (CGR, LAI, RGR and NAR), dry matter accumulation and HI and nutrient content of the leaf were examined. N P K fertilizers together with S and Zn, singly or in combination were applied. The results showed that at treatments T5 (NP), T8 (NPK), T9 (NPKS) and T10 (NPKZn) the higher seed yield (> 2600 kg ha-1) coincided with TDM>880 g m-2, the peak CGR >= 13.9 g m-2 day-1 and the maximum LAI >= 4.1. The higher seed yield at T5, T8, T9 and T10 coincided with higher concentrations of nutrients: N, P, K, S and Zn in leaf at flowering having >= 3.40%, >= 0.25%, >= 1.53%, >= 110 ppm and >= 22.7 ppm, indicating substantial levels of translocation of nutrients at various stages of plant growth and higher number of pods per plant (>= 179). Combined application of NPKZn at T10 resulted in maximum seed yield (3090 kg ha-1), coinciding with the maximum number of pods per plant (230), maximum TDM (1043 kg ha-1), maximum CGR (20.09 g m-2 day-1) and maximum LAI (4.69).
  Esmaeil Yasari , M.A. Esmaeili Azadgoleh , Saedeh Mozafari and Mahsa Rafati Alashti
  For investigating the effect of chemical fertilizer as well as biofertilizers on seed yield and quality i.e. oil, protein and nutrients concentration of rapeseed (Brassica napus L.), a split-plot fertilizers application experimental design in 4 replications was carried out during the 2005-2006 growing season, at the Gharakheil Agricultural Research Station in the Mazandaran province of Iran. Rapeseed was grown as a second crop in rotation after rice. Biofertilizers treatments were two different levels: control (no seed inoculation) and seeds inoculation with a combination of Azotobacter chroococcum and Azosprillum brasilense and Azosprillum lipoferum, as main plot and chemical fertilizers comprised N, P, K and their combinations, NPKS and NPK Zn as sub plots. The maximum value of seed yield obtained at (BF+NPK Zn) 3421.2 kg h-1 corresponding to 244.5 pods per plant and maximum concentration of Zn in leaves as well as seeds. The highest weight of 1000 seeds (4.45 g) happened to obtain at (BF+NPK S) which coinciding with the maximum K levels in leaves. The highest number of branches was obtained at (BF+NPK Zn) with 4.43 branches per plant i.e., 46.2% increase over the control. The maximum value of rapeseed oil content 47.73% obtained at T16 (BF+NK) but maximum protein concentration of seed obtained at T12 (BF+N). Overall the results indicated that inoculation resulted in increase in seeds yield (21.17%), number of pods per plant (16.05%), number of branches (11.78%), weight of 1000 grain (2.92%), oil content of seeds (1.73%) and protein (3.91%) but decrease (-0.24%) in number of seeds per pods comparing to non-Biofertilizers treatments. Irrespective to the treatments, results showed that application of Biofertilizers coincided with 3.86, 0.82, 2.25, 0.75 and 0.91% increase in concentrations of N, P, K, S and Zn in the seeds over the non-Biofertilizers treatments.
 
 
 
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