| Nitrogen release rate and prediction of micro water soluble cement and coated fertilizer |
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| DOI：10.7606/j.issn.1000-7601.2016.01.17 |
| Key Words: micro-water soluble felted and coated fertilizer arid and semi-arid area nitrogen release rate prediction |
| Author Name | Affiliation | | XIAO Qiang | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Slow and Controlled Released Fertilizer Engineering and Technology and Research Center of Beijing, Beijing 100097, China | | WEI Gong-chen | Agricultural Science Research Institute, Fangshan District, Beijing 100015, China | | LU Dong | Institute of Anshan City Land and Resources Survey and Design, Anshan, Liaoning 114002, China | | SUN Peng | Department of Land and Resources of Liaoning Province, Administration of Land Levy Turning to Utilization, Shenyang, Liaoning 110032, China | | YI Wen-ping | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Slow and Controlled Released Fertilizer Engineering and Technology and Research Center of Beijing, Beijing 100097, China | | NI Xiao-hui | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Slow and Controlled Released Fertilizer Engineering and Technology and Research Center of Beijing, Beijing 100097, China | | XU Qiu-ming | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Slow and Controlled Released Fertilizer Engineering and Technology and Research Center of Beijing, Beijing 100097, China | | LI Li-xia | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Slow and Controlled Released Fertilizer Engineering and Technology and Research Center of Beijing, Beijing 100097, China | | CAO Bing | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
Slow and Controlled Released Fertilizer Engineering and Technology and Research Center of Beijing, Beijing 100097, China |
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| Abstract: |
| Incubation test was used to investigate nitrogen release rate of micro water soluble felted and coated fertilizer that was applied to semiarid climatic environment under the condition of different soil moisture levels, and a prediction equations was built based on the one-level chemical reaction and the field test. The results showed that the accumulation of nitrogen release was positively correlated with soil water content. At 75 days when soil water contents were 22%, 14% and 6%, the nitrogen releases reached 85%～90%, 60%～82%, and 35%～42%, respectively. In addition, the field experiments implied that nitrogen release rate was significantly influenced by rainfall and soil water content. After a rainfall or under high soil moisture conditions, nitrogen release rate became increased and vice versa. Therefore, a prediction equation was built through the least square method for parameters and soil water content was the main parameter. The predicted values fitted well with the measured values with an R2=0.976. |
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