Fates of N-15-labeled fertilizer in a black soil-maize system and the response to straw incorporation in Northeast China
文献类型：期刊论文
| 作者 | Quan, Zhi; Li, Shanlong; Zhu, Feifei; Zhang, Limei; He, Jizheng; Wei, Wenxue; Fang, Yunting |
| 刊名 | JOURNAL OF SOILS AND SEDIMENTS
 |
| 出版日期 | 2018-04-01 |
| 卷号 | 18期号:4页码:1441-1452 |
| ISSN号 | 1439-0108 |
| 关键词 | N-15 labeling Mollisol Allocation Fertilizer-derived N Nitrogen use efficiency |
| 文献子类 | Article |
| 英文摘要 | Over-fertilization has caused low nitrogen (N) use efficiency and N pollution in China. A better understanding of the fate of fertilizer N is critical for improved appropriate N management practices. We examined the fate of urea-N applied to a typical black soil-maize system and the response to straw incorporation in Northeast China using the field N-15 labeling technique. Large plots (25 m(2)) were used to reduce artificial disturbance and facilitate multiple samplings in one growing season. We found that of the applied N (200 kg N ha(-1)), 52% was taken up by crops at harvest and 24% was retained in the soil (0-40 cm). The unrecovered 23% was likely lost via gases emission or leaching, which mainly occurred in the early days of maize cultivation. Fertilizer N contributions to the crop N uptake were 42% during vegetative growth and 30% during reproductive growth, which indirectly indicates that native soil N was the dominant N source for maize growth. However, high N uptake by maize resulted in low replenishment of fertilizer N to soil N. As a potential nutrient management approach, straw incorporation (2.4 t ha(-1)) stimulated N retention and reduced N loss, with 14% unrecovered fertilizer N. To maintain long-term soil N supplies, straw incorporation could be a valid agronomic practice to prevent the degradation of black soil because of long-term N depletion during maize cultivation in Northeast China. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41219]  |
| 专题 | 生态环境研究中心_土壤环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Quan, Zhi,Li, Shanlong,Zhu, Feifei,et al. Fates of N-15-labeled fertilizer in a black soil-maize system and the response to straw incorporation in Northeast China[J]. JOURNAL OF SOILS AND SEDIMENTS,2018,18(4):1441-1452. |
| APA | Quan, Zhi.,Li, Shanlong.,Zhu, Feifei.,Zhang, Limei.,He, Jizheng.,...&Fang, Yunting.(2018).Fates of N-15-labeled fertilizer in a black soil-maize system and the response to straw incorporation in Northeast China.JOURNAL OF SOILS AND SEDIMENTS,18(4),1441-1452. |
| MLA | Quan, Zhi,et al."Fates of N-15-labeled fertilizer in a black soil-maize system and the response to straw incorporation in Northeast China".JOURNAL OF SOILS AND SEDIMENTS 18.4(2018):1441-1452. |
入库方式： OAI收割
来源：生态环境研究中心
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