Research
Investigation of the Energy Flow and its Effects on Global Warming Potential (GWP) of Rainfed Wheat Farms in the Golestan Province (Aqal City)
Recently evaluation of input, output and global warming potential (GWP) have been an extension in sciences of agricultural. For this study, 95 farmers were selected for rained Wheat in the semi-salty farm in the north of Golestan Province (Aqal City).The data including (machines, seeds, fertilizers, fuel, and pesticides) were collected by questioner. Then fuel, input and output energy, energy evaluation indexes and global warming potential (kg CO2/ha-1) were calculated. Results showed that the most direct input energy from fuel in rained Wheat was 38.8 percent. Also, the highest indirect input energy in rainfed Wheat was 31.3 that related to fertilizers. The ratio of output to input energy in rainfed Wheat was calculate 5.01. The amount of GWP was 943.5 (kg CO2/ha-1) in rainfed Wheat. The highest GWP was related to nitrogen fertilizer and fuel consumption. For Wheat, the consumption of fuel and fertilizer constitute the high percent of energy consumption and greenhouse gas emissions. So that, the use of devices that reduce fuel consumption is recommended, also need for research and investigation on crop rotation and nitrogen fixation plants were revealed.
The Effect of Cutting Time under Different Amounts of Nitrogen on Yield and Yield Components of Barley
The present research was aimed to study the effect of different levels of inorganic fertilizer N on the yield and yield components of barley varieties at Gorgan Research Station, Iran in 2014-2015 year. A split plot layout within randomized complete block design with 3 replications was used. Main plot were different level of nitrogen fertilizer (35,70 and 105 kg N ha-1) from urea source, and sub plot were different varieties (Line 3, Line 7 and Line 17). Condition represented the effect of nitrogen was significant on feed and grain yield, Protein yield, Plant height, HI. Maximum Plant height, HI and grain yield was recorded in sterling. The highest Feed yield, grain yield was observed in Line 5 variety. Nitrogen applied at the rate of 105 kg N ha-1 resulted in maximum Plant height, Harvest Index, feed yield, grain yield, Protein yield.
