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| The nitrogen mineralization characteristics of organic fertilizer for livestock and poultry under paddy-upland rotation |
| Received:September 06, 2021 |
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| KeyWord:paddy and drought rotation;organic fertilizer;livestock manure;nitrogen mineralization |
| Author Name | Affiliation | E-mail | | SHEN Shizhou | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China | | | WAN Chen | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China
College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | MA Yingjun | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China
College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | HU Yukang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China
College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | WANG Feng | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China | | | ZHANG Keqiang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China | kqzhang68@126.com |
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| Abstract: |
| The objective of this study was to explore the nitrogen mineralization characteristics of different organic fertilizers for livestock and poultry and provide a basis for scientific fertilization under the paddy and dry rotation mode. The experiment included five treatments:blank, sheep manure, cow manure, chicken manure, and pig manure. The field in situ cultivation method was used to monitor the ammonium nitrogen and nitrate within 300 days after application of organic fertilizers. The results showed that the mineral nitrogen of organic fertilizer was mainly ammonium nitrogen, and the nitrate nitrogen content was very low. The ammonium nitrogen content of different organic fertilizer treatments increased first and then gradually stabilized. The ammonium nitrogen content of the chicken manure treatment was significant and higher than the other organic fertilizer treatments. The nitrate nitrogen content of the different organic fertilizer treatments fluctuated and declined rapidly in the first 30 days. The differences in the nitrate nitrogen content between the different organic fertilizer treatments gradually decreased with time. Flooded conditions promote the mineralization of organic fertilizers; however, it inhibits their nitrification. The net nitrogen mineralization rate of each organic fertilizer treatment was higher under the flooded conditions during the rainy season, whereas it was stable under the aerobic conditions during the dry season. There was no significant increase or decrease; however, the net nitrogen mineralization rate of each organic fertilizer treatment was low. The net nitrogen mineralization rate of each organic fertilizer treatment was higher during the early cultivation stage, concentrated in the first 60 days, and the difference between different treatments was significant. The treatment of chicken manure and cow manure was significantly higher than that of the other treatments. The net nitrogen mineralization rate of each treatment during the later culture period was low and stable, and the difference between the different treatments was small. After 300 d of culture, the cumulative nitrogen mineralization amounts of the chicken manure, cow manure, sheep manure, and pig manure treatments were 32.99, 17.60, 13.90, 12.83 mg·kg-1, respectively. Therefore, the nitrogen mineralization effect of each treatment was in the order of chicken manure > cow manure > sheep manure > pig manure. |
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