Variation in Yield Gap Induced by Nitrogen, Phosphorus and Potassium Fertilizer in North China Plain
文献类型：SCI/SSCI论文
| 作者 | Dai X. Q. ; Ouyang Z. ; Li Y. S. ; Wang H. M. |
| 发表日期 | 2013 |
| 关键词 | long-term fertilization soil organic-carbon cropping systems inorganic fertilizers manure application grain-yield maize nutrient efficiency |
| 英文摘要 | A field experiment was conducted under a wheat-maize rotation system from 1990 to 2006 in North China Plain (NCP) to determine the effects of N, P and K on yield and yield gap. There were five treatments: NPK, PK, NK, NP and a control. Average wheat and maize yields were the highest in the NPK treatment, followed by those in the NP plots among all treatments. For wheat and maize yield, a significant increasing trend over time was found in the NPK-treated plots and a decreasing trend in the NK-treated plots. In the absence of N or P, wheat and maize yields were significantly lower than those in the NPK treatment. For both crops, the increasing rate of the yield gap was the highest in the P omission plots, i.e., 189.1 kg ha(-1) yr(-1) for wheat and 560.6 kg ha(-1) yr(-1) for maize. The cumulative omission of P fertilizer induced a deficit in the soil available N and extractable P concentrations for maize. The P fertilizer was more pivotal in long-term wheat and maize growth and soil fertility conservation in NCP, although the N fertilizer input was important for both crops growth. The crop response to K fertilizers was much lower than that to N or P fertilizers, but for maize, the cumulative omission of K fertilizer decreased the yield by 26% and increased the yield gap at a rate of 322.7 kg ha(-1) yr(-1). The soil indigenous K supply was not sufficiently high to meet maize K requirement over a long period. The proper application of K fertilizers is necessary for maize production in the region. Thus, the appropriate application of N and P fertilizers for the growth of both crops, while regularly combining K fertilizers for maize growth, is absolutely necessary for sustainable crop production in the NCP. |
| 出处 | Plos One |
| 卷 | 8 |
| 期 | 12 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1932-6203 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30608]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Dai X. Q.,Ouyang Z.,Li Y. S.,et al. Variation in Yield Gap Induced by Nitrogen, Phosphorus and Potassium Fertilizer in North China Plain. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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