ISWC OpenIR  > 水保所知识产出(1956---)
不同坡度坡耕地土壤氮磷的流失与迁移过程
王丽1,2; 王力1; 王全九2
2015
发表期刊水土保持学报
卷号29期号:2页码:69-75
摘要

采用人工模拟降雨试验研究不同坡度的土壤侵蚀程度,分析了土壤养分在不同坡度(5°,10°,15°,
20°,25°)随坡面径流流失及水分入渗向下迁移的动态变化过程和机制。结果表明,在恒定降雨强度下,初
始产流10min内,产流产沙量随时间迅速递增,随后缓慢增加并逐渐趋于稳定,总产流量大小为15°>10°
>20°>5°>25°;10°总产沙量最大,15°和20°总产沙量相近,5°和25°总产沙量接近。不同坡度条件下总产
流量和总产沙量随坡度的变化趋势均可用二次函数拟合,相关系数R2 为0.65。10°~15°坡度之间存在一
个对径流中养分浓度变化有显著影响的转折点。硝态氮在湿润层内的迁移过程用幂函数描述,铵态氮在
湿润层内的浓度变化用三次多项式拟合,速效磷浓度在湿润层内随深度变化并不明显;硝态氮、铵态氮总
流失量随坡度的变化趋势符合二次多项式变化,相关系数R2 分别为0.91和0.77。20°时水溶性磷流失总
量最大,为15°坡面的1.61倍。径流中初始养分浓度主要受养分在径流中溶解度的影响,在产流后期,土
壤流失量对径流养分浓度的影响程度加大。

其他摘要

Took artificial simulation rainfall to study soil erosion degree in different slopes(5,10,15,20,25
degrees)and analyzed process and mechanism of dynamic changes of the soil nutrient loss with runoff erosion
and migration with water infiltration in different slopes.The results showed that under the constant rainfall
intensity the runoff and sediment yield increased rapidly within the initial 10minutes then increased slowly
and gradually stabilized.The order of output flow was 15degree>10degree>20degree>5degree>25
degree.10degree total sediment yield was maximum,15degree and 20degree of the total sediment yield
were similar,5degree and 25degree of the total sediment yield were close.Under the conditions of different
slopes,the trend with the slope of total runoff and total sediment yield could be fitted with a quadratic
function and the correlation coefficient R2 was 0.65.And there was a critical value that had a significant
effects on nutrient concentrations of runoff under slope degrees between 10degree and 15degree.In addition
the migration process of nitrate nitrogen in wet layer could be described in the power function and the
concentration change of ammonium nitrogen in wet layer was in agreement with cubic polynomial curve,
while there was no significant change of the available P concentration with depth under the wet layer.The trend
with the slope of the total loss amount of nitrate and ammonium were quadratic polynomial change,the correlation
coefficient R2 was 0.91and 0.77respectively.The total amount of water-soluble phosphorus loss was maximum on
20degree,it was 1.61times of 15degree slope.Initial nutrient concentration in runoff influenced mainly by nutrient
solubility and the quantity of soil loss had more effects on the nutrient concentration in the late runoff.

关键词人工降雨 坡度 地表径流 养分流失
收录类别中文核心期刊要目总览
语种中文
文献类型期刊论文
条目标识符sbir.nwafu.edu.cn/handle/361005/9676
专题水保所知识产出(1956---)
作者单位1.西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室
2.中国科学院水利部水土保持研究所
第一作者单位中国科学院水利部水土保持研究所
推荐引用方式
GB/T 7714
王丽,王力,王全九. 不同坡度坡耕地土壤氮磷的流失与迁移过程[J]. 水土保持学报,2015,29(2):69-75.
APA 王丽,王力,&王全九.(2015).不同坡度坡耕地土壤氮磷的流失与迁移过程.水土保持学报,29(2),69-75.
MLA 王丽,et al."不同坡度坡耕地土壤氮磷的流失与迁移过程".水土保持学报 29.2(2015):69-75.
条目包含的文件 下载所有文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
不同坡度坡耕地土壤氮磷的流失与迁移过程_(346KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 下载
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[王丽]的文章
[王力]的文章
[王全九]的文章
百度学术
百度学术中相似的文章
[王丽]的文章
[王力]的文章
[王全九]的文章
必应学术
必应学术中相似的文章
[王丽]的文章
[王力]的文章
[王全九]的文章
相关权益政策
暂无数据
收藏/分享
文件名: 不同坡度坡耕地土壤氮磷的流失与迁移过程_王丽.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 

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。