Effects of Hedgerow on Physical Properties and Nutrients of the Purple Soil

CHEN Yun; MA Yun; HE Bing-hui

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Effects of Hedgerow on Physical Properties and Nutrients of the Purple Soil

更新时间：2024-11-07

- Effects of Hedgerow on Physical Properties and Nutrients of the Purple Soil
- Vol. 25, Issue 6, (2011)
- 作者机构：
  
  1. 西南大学资源环境学院三峡库区生态环境教育部重点实验室
  2. 宁夏水利厅水文水资源勘测局
  3. 黄土高原土壤侵蚀与旱地农业国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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CHEN Yun, MA Yun, HE Bing-hui. Effects of Hedgerow on Physical Properties and Nutrients of the Purple Soil[J]. 2011, 25(6).
DOI：

CHEN Yun, MA Yun, HE Bing-hui. Effects of Hedgerow on Physical Properties and Nutrients of the Purple Soil[J]. 2011, 25(6). DOI：

摘要

在四川盆地紫色土区通过标准径流小区试验研究香根草植物篱对不同坡度的坡耕地表层(0-20cm)土壤容重、颗粒分布及养分流失的影响。结果表明

香根草植物篱有利于土壤容重减小

但总体上效果不显著。在植物篱的影响下

土壤细颗粒(粉粒、粘粒)在坡脚、坡腰明显富集

且总体上细颗粒流失减少

所以砂粒含量相对降低。香根草植物篱能有效控制表土各养分的流失

保持土壤肥力;能减少各养分在坡顶的流失

但全氮的流失依然严重;能加剧各养分在坡脚的富集

其中对有机质的影响最明显;能明显提高篱带前土壤肥力

尤其是总磷和速效钾含量。有机质、全氮、总磷、有效磷、速效钾的变化量分别与粘粒变化量呈显著线性正相关(r=0.859

0.896

0.821

0.807

0.927)

与粉粒变化量相关性不强

所以它们在坡面上的变化趋势与粘粒基本一致。在植物篱小区

坡度对有机质、全氮、碱解氮、全钾的富集影响不明显

但坡度较小时

有效钾、坡顶碱解氮和坡顶有效磷的流失显著减少

所有小区坡面上的全钾含量均增加。因此

该区紫色土坡耕地要注意补充氮肥

减少钾肥

加强坡顶和远篱带处土壤的培肥。

Abstract

Through experiments in standard runoff plots

this paper studied effects of vetiver hedgerow on bulk density

particle distribution and nutrient loss in the surface soil layer(0-20 cm) of different slope farmland in the purple soil area

Sichuan

China.The results showed that Vetiver hedgerow could reduce soil bulk density

but the effect was not significant.Under hedgerow's effect

small soil particles(silt

clay) obviously enriched in the bottom and middle of slope

and the quantity of small particles loss reduce...

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