Yield and Potassium Balance in a Wheat-Maize Cropping System of the North China Plain
文献类型：SCI/SSCI论文
| 作者 | He C. E. ; Ouyang Z. ; Tian Z. R. ; Schaffer H. D. |
| 发表日期 | 2012 |
| 关键词 | grain-yield fertilizer nitrogen rice soil phosphorus efficiency fraction fields inputs |
| 英文摘要 | This study examined the effects of long-term K fertilization on crop yields and K use efficiency and balance under a wheat (Triticum aestivum L.)-maize (Zea mays L.) cropping system in the Fluvo-Aquic soil of Yucheng Comprehensive Experiment Station in the North China Plain (NCP). Results showed that the native K supply could maintain annual grain yields at stable levels at 10.7 Mg ha(-1) for >19 yr with applications of N and P alone. The application of K alone significantly improved maize yield by 46% but wheat showed no response. The agronomic efficiency, physiological efficiency, and partial factor productivity but not apparent use efficiency of wheat were significantly lower than the average values previously reported. In addition, only 43% of K found in the aboveground biomass of wheat and maize came from an annual application of fertilizer. The application of K caused a large K surplus, even with balanced fertilization, in which 33% of applied K was left in the soil, mostly in the 0- to 20-cm depth due to its surface application. The data indicated that the native K supply in the NCP might sustain normal wheat yields for about 10 to 30 yr. Generally, in a Fluvo-Aquic soil with a high content of soil available K, soil K can be used. In this study, 471 kg ha(-1) yr(-1) K input was excessive for the growth of maize and wheat, and at least 120 to 150 kg ha(-1) yr(-1) K could be saved with the use of balanced fertilization. |
| 出处 | Agronomy Journal |
| 卷 | 104 |
| 期 | 4 |
| 页 | 1016-1022 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0002-1962 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/26913]  |
| 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 | He C. E.,Ouyang Z.,Tian Z. R.,et al. Yield and Potassium Balance in a Wheat-Maize Cropping System of the North China Plain. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。