Ashkan Jalilian; Ghorban Khodabin; MOJDEH SADAT Khayat Moghadam; Ehsan Zandi Esfahan; Fatemeh Amini; Nima Shahbazi; Mohammad Zargaran
Abstract
The use of nitrification inhibitor nitrapyrin is vital for the long-term maintenance of urea fertilizer in the soil and preventing its leaching. Therefore, this study was carried out to investigate the yield and physiological characteristics of different wheat cultivars under different levels of fertilization ...
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The use of nitrification inhibitor nitrapyrin is vital for the long-term maintenance of urea fertilizer in the soil and preventing its leaching. Therefore, this study was carried out to investigate the yield and physiological characteristics of different wheat cultivars under different levels of fertilization and tillage systems. This study was performed as a split-split plot based on a randomized complete block design with three replicates in Karaj during two cropping seasons (2019-21). The experimental treatments included two tillage levels (no-tillage and conventional tillage) in the main plot and three fertilizer levels (urea, nitrapyrin + urea combination and control (main plot), and two cultivars (Rokshan and Pishgam) in the secondary plot. The results of the composite analysis showed that the highest yield of wheat grain was obtained in Rakhshan cultivar with 8331 kg/ha and the level of urea + nitrapyrin fertilizer was obtained in no-tillage, which was 6.15% superior to the level of urea. Also, in both tillage systems, the highest amount of leaf area index and nitrogen productivity index was obtained in the same treatment, so compared to the treatment of urea application, 6.1%, 2.7% in no-tillage and 0.8% and 1.3% in Cultivation was more common. In general, nitrapyrin improved wheat yield in both tillage levels. In addition to improving plant performance, the use of nitrapyrin can also be effective in reducing environmental hazards caused by the use of chemical fertilizers such as urea.
Mohsen Seilsepour
Abstract
In order to investigate the effects of compost and nitrogen on quantitative and protein content of forage corn and some physical and chemical properties of soil, a factorial experiment with 9 treatments in a factorial randomized complete block design has been conducted in the farm of Tehran Agricultural ...
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In order to investigate the effects of compost and nitrogen on quantitative and protein content of forage corn and some physical and chemical properties of soil, a factorial experiment with 9 treatments in a factorial randomized complete block design has been conducted in the farm of Tehran Agricultural and Natural Resources Research and Education Center during 2014. The treatments include three levels of residual compost (0, 10, and 20 Ton.ha-1) and three levels of nitrogen (0, 100, and 200 kg.ha-1) as urea. The effect of municipal waste and nitrogen compost on yield and yield components has been significant. The use of municipal solid waste compost has significantly increased the electrical conductivity of soil, nitrate, iron, and zinc uptake, while significantly decreasing soil reaction. Waste compost application has also improved some soil physical properties. Bulk density is significantly reduced and field capacity and soil available water are increased. Therefore, in the similar soil conditions of this ersearch, the use of 200 kg.ha-1 of pure nitrogen from the urea source with 20 Ton.ha-1 of municipal solid waste compost is recommended to achieve the maximum dry forage yield of 21.44 tons per hectare.
Hossein Monjezi; Mohammad Moradi Telavat; Seyyed Ataollah Siadat; Ahmad Koochakzadeh; Hassan Hamdi
Abstract
Filter mud is a residual of sugar extraction process produced in huge volume and has high organic matter and essential elements. Regarding to these properties, it seems this material could be a useful fertilizer in crop production. To evaluate effect of sugarcane filter muds and chemical and biological ...
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Filter mud is a residual of sugar extraction process produced in huge volume and has high organic matter and essential elements. Regarding to these properties, it seems this material could be a useful fertilizer in crop production. To evaluate effect of sugarcane filter muds and chemical and biological fertilizers application on canola (Brassica napus L.) yield and some of soil properties, a factorial experiment was conducted in 2012 in experimental farm of Ramin (Mollasani) Agriculture and Natural Resources University of Khouzestan. A complete block design was used for the experiment in three replications. Different integrated treatments of filter muds and chemical fertilizers including A1: 100 percent filter muds, A2: 75 percent filter muds and 25 percent chemical fertilizers, A3: 50 percent filter muds and 50 precent chemical fertilizers, A4: 25 percent filter muds and 75 percent chemical fertilizers and A5: 100 percent chemical fertilizers were investigated as an experimental factor. Other experimental factor was biological fertilizers application (with and without biological fertilizers). The biological fertilizers investigated in this study were included nitroxin and Barvar 2. Application of filter muds had significant effects on canola yield, yield components, grain oil and protein contents. The soil organic matter and salinity also were affected by filter muds significantly. Highest canola grain yield was obtained by integration of filter muds and chemical fertilizers. Increase of filter muds caused to increase of grain oil content and decrease of nitrogen and nitrate content. On the other hand, increase of chemical fertilizers increased nitrate and nitrogen contents and decreased oil content. In addition, increase of filter muds resulted in higher soil organic matter and salinity, simultaneously.