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Articles by H. Nadian
Total Records ( 3 ) for H. Nadian
  A. Mohammadi Torkashvand , S. Radmehr and H. Nadian
  This research investigates compost production from sugar cane organic wastes by using Trichoderma fungi. A factorial completely randomized design was done included 12 treatments and they were replicated three times. Treatments included 1. Adjusting pH of water used for moistening organic matters in three levels (pH equal 5.5, 4.5 and 3.5) and 2. Four levels of urea (0.5, 1, 1.5 and 2% fertilizer/total weight of organic matters). Each treatment contained 50, 50, 20 and 12 kg of bagasse, filter cake, manure and fresh alfalfa, respectively, in pits (1x1x1 m). The microorganism`s suspension was sprayed on the raw materials amounted 2.5 mL kg-1 dry organic matters. Organic wastes were manually mixed at a week intervals throughout the composting period to provide aeration, also, adjusting moisture to 60% by weight. A representative sample was taken from composite sub-samples collected from each composting pile every after mixing. In sub-samples after 5th and 10th weeks, total nitrogen and phosphorus, organic carbon and potassium were measured. The pH and EC were determined on a water extract from compost using compost to water ratio of 1:5 by weight. Results indicated that the trend of temperature variations was same for different treatments and more influence by the microorganism`s activity in compared with treatment kind. C/N ratio reduced below 30 in 5 weeks and below 20 in 10 weeks after composting. The best treatment pay attention to carbon, nitrogen, C/N ratio, decrease in compost weight and costs is 0.5% urea treatment moistened with pH = 5.5 water.
  M.R. Moradi-Telavat , S.A. Siadat , H. Nadian and G. Fathi
  In order to study the effects of nitrogen and boron on canola yield and its components, in Ahwaz region, an experiment was conducted in 2005-2006 at Ramin Agriculture and Natural Resources University. The experimental design was a randomized completely block with three N rates (150, 200 and 250 kg ha-1) and four B rates (0, 2.5, 5 and 10 kg ha-1). All treatments replicated four times. Results showed that with increase of nitrogen rates, the number of siliques m-2, number of seeds per silique, 1000 grain weight, seed yield, oil yield and biological yield significantly increased but Harvest Index (HI) and grain oil percentage decreased. With increase of boron rates, number of seeds per silique, grain yield, oil yield and harvest index significantly increased, but no significant effect of boron rates on the number of siliques m-2, 1000 grain weight, biological yield and grain oil percentage was observed. The highest grain and oil yield (3095 and 1345 kg ha-1, respectively) were obtained with 250 and 10 kg ha-1 N and B, respectively. Although, the interaction effect of nitrogen and boron on economical yield was not significant, 200 kg N ha-1 and 10 kg B ha-1 had equal grain and oil yield (2803 and 1265 kg ha-1, respectively) to 250 kg N ha-1 and without B application (2640 and 1143 kg ha-1, seed and oil yield, respectively). This experiment showed that B application for canola can result in less use of nitrogen fertilizers. Therefore, B application in this experiment condition is very important agronomic factor.
  A. Danesh-Shahraki , H. Nadian , A. Bakhshandeh , G. Fathi , K. Alamisaied and M. Gharineh
  In order to optimization of irrigation and nitrogen management for rapeseed (Brassica napus L. cv. Hyola 401) production at terminal drought stress, an experiment was conducted in a split plot at base of RCB design with four replications in experimental field of Agricultural and Natural Resource University of Ramin during 2005-2007. Irrigation management at three levels: without stress, moderate and severe water stress established as main plots and four N fertilizer rates: 90, 140, 190 and 240 kg N ha-1 were consider as sub plots. The results showed that rapeseed oil and grain yield was affected by terminal drought stress severely. Moderate and severe drought stress reduced grain yield by 14.5 and 32% compared to no stress condition, respectively. With increasing of N rate the number of branches, pod m-2 and 1000-seed weight and consequently seed yield was increased significantly. Seed oil content adverse to seed protein content with increasing the severity of drought stress was decreased. Increase in nitrogen led to increase in protein content, but oil content was decreased. Highest seed and oil yield (3996.3 and 1803.9 kg ha-1, respectively) with 190 kg N ha-1 at no stress condition was obtained. According to these results for maximize production of rapeseed in this region and probably in similar conditions full irrigation and application of 190 kg N ha-1 (with respect to soil analyze) was recommended.
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