Fertilization increases paddy soil organic carbon density
| Autor: | Huo-xi Sun, Tian-fang Dai, Yingxu Chen, Shaoxian Wang, Xinqiang Liang, Qi-xiang Luo, Zu-zhang Li, Jun-nan Wan, Fang Fan, Xiao-jun Li |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
business.product_category
Mineralogy chemistry.chemical_element engineering.material Carbon sequestration General Biochemistry Genetics and Molecular Biology Plough Soil Human fertilization Organic Chemicals General Pharmacology Toxicology and Pharmaceutics Fertilizers General Veterinary Chemistry Soil chemistry Oryza General Medicine Soil carbon Carbon Agronomy Soil water engineering Fertilizer business Biotechnology |
| Zdroj: | Journal of Zhejiang University SCIENCE B. 13:274-282 |
| ISSN: | 1862-1783 1673-1581 |
| DOI: | 10.1631/jzus.b1100145 |
| Popis: | Field experiments provide an opportunity to study the effects of fertilization on soil organic carbon (SOC) sequestration. We sampled soils from a long-term (25 years) paddy experiment in subtropical China. The experiment included eight treatments: (1) check, (2) PK, (3) NP, (4) NK, (5) NPK, (6) 7F:3M (N, P, K inorganic fertilizers+30% organic N), (7) 5F:5M (N, P, K inorganic fertilizers+50% organic N), (8) 3F:7M (N, P, K inorganic fertilizers+70% organic N). Fertilization increased SOC content in the plow layers compared to the non-fertilized check treatment. The SOC density in the top 100 cm of soil ranged from 73.12 to 91.36 Mg/ha. The SOC densities of all fertilizer treatments were greater than that of the check. Those treatments that combined inorganic fertilizers and organic amendments had greater SOC densities than those receiving only inorganic fertilizers. The SOC density was closely correlated to the sum of the soil carbon converted from organic amendments and rice residues. Carbon sequestration in paddy soils could be achieved by balanced and combined fertilization. Fertilization combining both inorganic fertilizers and organic amendments is an effective sustainable practice to sequestrate SOC. |
| Databáze: | OpenAIRE |
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