| 长期不施肥条件下几种典型土壤全磷和Olsen-P的变化 |
| |
| 引用本文： | 曲均峰,李菊梅,徐明岗,戴建军. 长期不施肥条件下几种典型土壤全磷和Olsen-P的变化[J]. 植物营养与肥料学报, 2008, 14(1): 90-98. DOI: 10.11674/zwyf.2008.0115 |
| |
| 作者姓名： | 曲均峰 李菊梅 徐明岗 戴建军 |
| |
| 作者单位： | 1.东北农业大学资源与环境学院,黑龙江哈尔滨,150030; |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划) , 国家科技支撑计划 |
| |
| 摘 要： | 研究了11个不同气候条件、不同耕作制度、典型土壤类型长期定位试验不施肥处理土壤全磷和Olsen-P变化及其影响因素。结果表明，在长期不施肥条件下耕作，土壤Olsen-P含量下降比全磷的明显；在试验进行5年左右，土壤全磷含量都有所降低，以后各点表现不尽相同，新疆灰漠土、长沙水稻土和郑州潮土全磷含量随时间延长呈显著直线下降，其它试验点全磷的变化不明显；作物携出磷与土壤全磷下降之间，无论绝对含量或相对含量都不成比例。土壤Olsen磷下降率比全磷高几倍。Olsen-P下降趋势与起始土壤Olsen磷含量有关:起始土壤Olsen-P磷大于20 mg/kg时，25年内一直呈现明显下降趋势，降低40.5 mg/kg，特别是前5年下降更快，降低30 mg/kg；起始土壤Olsen-P为10～20 mg/kg时，下降趋势比前者缓慢，15年内一直呈明显下降趋势，下降19 mg/kg, 前5年下降15 mg/kg，15年后几乎不变；起始土壤Olsen-P小于10 mg/kg时，25年内无明显变化。Olsen-P下降量与起始Olsen-P占全磷的比例成显著直线关系。
|
| 关 键 词： | 长期定位试验 不施肥土壤 全磷 Olsen-P |
| 文章编号： | 1008-505X（2008）01-0090-09 |
| 收稿时间： | 2006-12-25 |
| 修稿时间： | 2007-05-22 |
Total-P and Olsen-P dynamics of long-term experiment without fertilization |
| |
| QU Jun-feng,LI Ju-mei,XU Ming-gang,DAI Jian-jun. Total-P and Olsen-P dynamics of long-term experiment without fertilization[J]. Plant Nutrition and Fertilizer Science, 2008, 14(1): 90-98. DOI: 10.11674/zwyf.2008.0115 |
| |
| Authors: | QU Jun-feng LI Ju-mei XU Ming-gang DAI Jian-jun |
| |
| Affiliation: | 1.College of Resources and Environment,Northeast University ,Haerbin 150030,China;
2 Institute of Agricultural Resources and Regional Planning,CAAS,Beijing 100081,China; |
| |
| Abstract: | Dynamics of total phosphorus and Olsen-P of soils without fertilization were studied with long-term experiment on eleven typical soils. The results indicated that changes of Olsen-P were more significant than that of total P over time in all soils. Soil total P decreased linearly with time for gray desert soil, paddy soil and fluvo-aquic soil, but did not change significantly for other soils. Decreases in soil total P was not significantly correlated with crop P uptake. Tendency of soil Olsen-P decrease differed with initial Olsen-P content in the soils. When initial Olsen-P was greater than 20 mg/kg, it decreased quickly and reduced 30 mg/kg in 5 years and reduced 40.5 mg/kg in 25 years. When initial Olsen- P was between 10 mg/kg and 20 mg/kg, they decreased slowly and reduced 15 mg/kg in 5 years and 19 mg/kg in 15 years. When initial Olsen-P was less than 10 mg/kg, there was no obvious change over time. The ratios of Olsen-P to total-P and avail-N to Olsen-P were two important factors influencing Olsen-P change. Olsen-P decreased linearly with ratio of Olsen-P to total-P. |
| |
| Keywords: | long-term experiment no-fertilization total P Olsen-P |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《植物营养与肥料学报》浏览原始摘要信息 |
|
点击此处可从《植物营养与肥料学报》下载全文 |
