| The effects of long-term different fertilization on carbon and nitrogen content in Lou soil |
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| DOI：10.7606/j.issn.1000-7601.2010.02.39 |
| Key Words: long-term fertilization nitrogen carbon Lou soil |
| Author Name | Affiliation | | CAO Yingfei | College of Resources and Environment, Northwestern A & F University, Yangling, Shaanxi 712100, China | | LIU Qingfang | College of Resources and Environment, Northwestern A & F University, Yangling, Shaanxi 712100, China | | LIU Ke | College of Resources and Environment, Northwestern A & F University, Yangling, Shaanxi 712100, China | | ZHANG Min | College of Resources and Environment, Northwestern A & F University, Yangling, Shaanxi 712100, China | | YU Rongya | College of Resources and Environment, Northwestern A & F University, Yangling, Shaanxi 712100, China | | HE Mengmeng | College of Resources and Environment, Northwestern A & F University, Yangling, Shaanxi 712100, China | | YANG Xueyun | College of Resources and Environment, Northwestern A & F University, Yangling, Shaanxi 712100, China | | Lü Jialong | College of Resources and Environment, Northwestern A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A long-term experiment was conducted in Lou soil to study the impact of carbon and nitrogen content under winter wheat-summer maize rotation system with different fertilizer treatments. The results showed that: whether the use of organic fertilizer alone, separate chemical fertilizer or organic manure with chemical fertilizer, can significantly increase soil organic carbon and total nitrogen content; Among them, effect of organic fertilizer with chemical fertilizer was the most obvious; the treatments of organic fertilizer with chemical fertilizer application and separate high application of organic fertilizer can significantly increase the soil alkali-hydrolyzable nitrogen content. While with separate low application of organic fertilizer treatment and separate high level application of chemical fertilizer treatment alkali-hydrolyzable nitrogen content stood stable almost. But the use of separate low level of fertilizer application and no fertilizer treatment(CK) greatly decreased the soil alkali-hydrolyzable nitrogen content; and also, the soil C/N had increased, with long-term aplication of organic manure. So the soil agro-ecological system has a strong protective effect on soil fertility. |
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