Potassium Fixation and Release Characteristics in Rhizosphere and Nonrhizosphere Soils for a Rapeseed-Rice Cropping Sequence
文献类型：期刊论文
| 作者 | Lu, Jianwei1; Li, Xiaokun1; Malhi, Sukhdev S.3; Chen, Fang2; Wu, Lishu1 |
| 刊名 | COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
 |
| 出版日期 | 2010 |
| 卷号 | 41期号:7页码:865-877 |
| 关键词 | Exchangeable extractable fixation potassium rapeseed release rhizobox rhizosphere rice rotation soil |
| ISSN号 | 0010-3624 |
| DOI | 10.1080/00103621003592374 |
| 英文摘要 | Potassium (K) fixation and release in soil are important factors in the long-term sustainability of a cropping system. Changes in K concentration and characteristics of K fixation and release in rhizosphere and nonrhizosphere soils in the rapeseed (Brassica napus L.)-rice (Oryza sativa L.) rotation were investigated using a rhizobox system. The concentrations of different forms of K in both rhizosphere and nonrhizosphere soils decreased with plants compared to without plants, regardless of K fertilizer application. Potassium uptake by crops mainly came from the rhizosphere soil. In the treatment without K fertilizer (-K), the main form of K supplied by the soil to the crops was 1.0 mol L(-1) nitric acid (HNO(3)) nonextractable K, followed by nonexchangeable K, and then exchangeable K. In the treatment with K fertilizer (+K), the main K forms supplied by the soil to the crops were exchangeable K and nonexchangeable K. The amount and rate of K fixation after one cycle of the rapeseed- rice rotation was greater in rhizosphere soil than in nonrhizosphere soil. The amount and rate of K fixation of soil in the +K treatment were significantly less than in the -K treatment. The cumulative amounts of K released with 1.0 mol L(-1) ammonium acetate (NH(4)OAc) and 1.0 mol L(-1) HNO(3) extraction increased with the increasing numbers of extractions, but the K-releasing power of soil by successive extraction decreased gradually and finally became almost constant. The release of K was less in rhizosphere soil than in nonrhizosphere soil. The release of K in the +K treatment was similar to that in the -K treatment in rhizosphere soil, but the K release in nonrhizosphere soil was greater with the +K than the -K treatment. Overall, the information obtained in this study will be helpful in formulating more precise K fertilizer recommendations for certain soils. |
| 资助项目 | Natural Science Foundation of China[40571090] ; International Plant Nutrition Institute (IPNI) |
| WOS研究方向 | Agriculture ; Plant Sciences ; Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000276763900006 |
| 出版者 | TAYLOR & FRANCIS INC |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/992]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Lu, Jianwei |
| 作者单位 | 1.Huazhong Agr Univ, Coll Resources & Environm, Wuhan, Peoples R China 2.Chinese Acad Sci, Wuhan Bot Garden, Wuhan, Peoples R China 3.Agr & Agri Food Canada, Res Farm, Melfort, SK, Canada |
| 推荐引用方式 GB/T 7714 | Lu, Jianwei,Li, Xiaokun,Malhi, Sukhdev S.,et al. Potassium Fixation and Release Characteristics in Rhizosphere and Nonrhizosphere Soils for a Rapeseed-Rice Cropping Sequence[J]. COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS,2010,41(7):865-877. |
| APA | Lu, Jianwei,Li, Xiaokun,Malhi, Sukhdev S.,Chen, Fang,&Wu, Lishu.(2010).Potassium Fixation and Release Characteristics in Rhizosphere and Nonrhizosphere Soils for a Rapeseed-Rice Cropping Sequence.COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS,41(7),865-877. |
| MLA | Lu, Jianwei,et al."Potassium Fixation and Release Characteristics in Rhizosphere and Nonrhizosphere Soils for a Rapeseed-Rice Cropping Sequence".COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS 41.7(2010):865-877. |
入库方式： OAI收割
来源：武汉植物园
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