施肥对紫色土坡耕地氮素淋失的影响
文献类型：期刊论文
| 作者 | 汪涛 ; 朱波
|
| 刊名 | 农业环境科学学报
 |
| 出版日期 | 2009-04-20 |
| 卷号 | 28期号:4页码:716-722 |
| 关键词 | 施肥 紫色土 氮素 淋失 坡耕地 |
| 其他题名 | Effects of Fertilization on Nitrogen Leaching from Hilislope Cropland of Purple Soil |
| 合作状况 | 其它 |
| 中文摘要 | 通过径流小区试验,研究了4种施肥条件下紫色土坡耕地氮素淋失特征。结果表明,单施氮肥、氮磷配施和氮磷钾配施等施肥处 理渗漏液中硝态氮含量在10.17～21.88mg·L-1之间,渗漏液硝态氮占总氮含量的比例在85.5%～90.8%之间。各施肥处理渗漏液硝态氮含量呈前 期较低,迅速上升,而后逐渐降低的季节变化趋势。玉米生长季各处理硝态氮淋失总量顺序为:单施氮肥>氮磷配施>氮磷钾配施>无肥处理,单施氮肥处理硝态氮淋失总量最高(44.31kg·hm-2),氮磷配施和氮磷钾配施处理硝态氮淋失量分别较单施氮肥降低47.6%和54.2%。氮磷钾合理配施方式有助于显著减少紫色土坡耕地硝态氮淋失。 |
| 英文摘要 | Abstract：Nitrogen leaching is an important route of nitrogen loss，whose mechanism in fiat cropland has been documented．However，it is unclear how nitrogen leaching takes place in sloping cropland．Field runof plot experiments were performed to monitor nitrogen leaching in sloping cropland of purple soil．Results showed that NO3-N contents of the leakage in three fertilization treatments，iE N(N)，N with P(NP)， Nwith P andK(NPK) rangedfrom 10．17to 21．88mg·L～ which accountedfor 85．8％-90．8％ oftotal nitrogenintheleakage．NO~-Nleach— ing exhibited obvious seasonal patterns with a rapid increase in the beginning and a gentle decrease in the end of the maize growth stage．The estimated total amount of NO；一N leaching in the maize growth season in difference treatments followed an order of：N>NP>NPK>CK．The to— tal leaching of NO；-N for the treatment N was 44．3 1 kg‘hm～．whereas that for the treatment NP and NPK decreased by 47．62％ and 54．23％ ． respectively．Therefore，nitrogen losses by leaching could be reduced through rational fertilizations in cropland of the hillslope．The estimated total amount of NO；一N absorbed by crops in different treatments followed an order of：NPK>NP>N>CK．The total N absorbed by crop for the treatment NPK was 93．02 kg·hm ．while that for the treatnlent N and NP decreased by 23．8％ and 10．6％ ．respectively．The difference of crops absorbing N ability could be the main reason of the effect of fertilization on nitrogen leaching in sloping cropland of purple soil． |
| 资助信息 | 国家自然科学基金(40571093);中国科学院西部行动计划(KZCX2-XB2-07-02);国家基础研究发展计划(973)(2005CB121108);中 |
| 语种 | 中文 |
| 公开日期 | 2010-08-28 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/1698]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 推荐引用方式 GB/T 7714 | 汪涛,朱波. 施肥对紫色土坡耕地氮素淋失的影响[J]. 农业环境科学学报,2009,28(4):716-722. |
| APA | 汪涛,&朱波.(2009).施肥对紫色土坡耕地氮素淋失的影响.农业环境科学学报,28(4),716-722. |
| MLA | 汪涛,et al."施肥对紫色土坡耕地氮素淋失的影响".农业环境科学学报 28.4(2009):716-722. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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