S446 : study the accumulation rate of soil nitrogen in biochar
Thesis > Central Library of Shahrood University > Agricultural Engineering > MSc > 2018
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Abstarct: Nitrogen is one of the major pollutants that caused the damage caused by regional, international and global problems. In most areas, agriculture is the main source of nitrogen pollution in surface water and underground waters. When nitrogen inputs are compared with fertilizers and nitrogen output in products (crops and straw), there is usually a significant amount of nitrogen that is stored in excess of nitrogen or stored in the soil or leached into the environment Wasted. Excessive nitrogen not absorbed by the plant is exposed to nitrogen leaching, runoff, volatilize and leaching, which causes water pollution and greenhouse remains, animal manure, gas emissions. The raw materials are subjected to a process called thermal decomposition or thermal-chemical separation, resulting in a biomagnification reordering. An factorial experiment on the baxse of complete randomize block design conducted that factors consisted of four levels of Nitrogen, nitrogen free, 80 kg N ha-1, 160 kg N ha-1, 320 kg N ha-1 nitrogen, and Biochar with 2 levels control and with biochar: Biochar made from rice bran to 30 g (1% by weight of potted soil). According to the number of treatment and replications, there were 80 cultivated pots. In general, application of rice bran alone or in combination with different levels of urea has a positive effect on the chemical and physical properties of the soil and has improved soil fertility, and also the biochar application of rice bran increases soil organic carbon, total nitrogen of soil, soil nitrate, soil moisture content and soil ammonium reduction and soil bulk density. Reduction of soil ammonium due to biochar application is probably due to the adsorption of ammonium on biochar, surfaces that can help maintain and maintain nitrogen and reduce soil nitrogen losses. With increasing urea application, the amount of nitrate, ammonium, total nitrogen, organic carbon, bulk density increased and soil pH decreased. Simultaneous application of rice bran and urea fertilizer at different levels increased nitrate, total nitrogen, organic carbon and further soil ammonium reduction compared to urea application alone. These results show the effect of synergism hazard of biochar and urea on the parameters. The rice bran application could significantly increase the parameters of bean growth, which could indicate the proper efficiency of rice bran as an organic fertilizer.
Keywords:
#biochar #ammonium #nitrate #organic carbon Link
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Keeping place: Central Library of Shahrood University
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