自然资源学报 ›› 2007, Vol. 22 ›› Issue (3): 424-433.doi: 10.11849/zrzyxb.2007.03.012

• 研究方法 • 上一篇    下一篇

地被物对土壤水分动态和水量平衡的影响研究

刘士余 左长清 朱金兆   

  1. 1. 北京林业大学水土保持学院, 北京100083; 2. 江西农业大学国土资源与环境学院,
    南昌330045; 3. 江西省水土保持科学研究所, 南昌330029
  • 收稿日期:2007-02-03 修回日期:2007-03-03 出版日期:2007-05-15 发布日期:2007-05-15
  • 通讯作者: 左长清( 1956- ) , 男, 湖南衡阳人, 教授级高级工程师, 博士生导师, 长期从事水土保持科学研究和管理工作。 E-mail:E-mail: zuochq@sina.com
  • 作者简介:刘士余( 1975- ) , 男, 江西南昌人, 副教授, 博士研究生, 主要从事水土保持教学与科研工作。E-mail:sliuy2@163.com
  • 基金资助:

    江西省科技厅重点科技攻关项目“红壤坡地生态农业及防洪减灾技术研究”资助。

A Study on Effects of Ground Cover on Dynamics of Soil Moistur e and Water Balance

LIU Shi-yu1,2, ZUO Chang-qing3, ZHU Jin-zhao1   

  1. 1.School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
    2.College of Land Resources and Environment, Jiangxi Agricultural University,
    Nanchang 330045, China; 3.Jiangxi Provincial Research Institute
    for Soil and Water Conservation, Nanchang 330029, China
  • Received:2007-02-03 Revised:2007-03-03 Online:2007-05-15 Published:2007-05-15

摘要: 通过土壤水分渗漏装置试验研究了百喜草( Paspalum notatum) 及其枯落物在红壤坡地对土 壤水分动态和水量平衡的影响。结果表明, 百喜草覆盖(A) 、百喜草敷盖(B) 、裸露对照(C) 的地表径 流系数分别为1.35%、2.78%和32.74%, C 的地表径流量分别是A、B 的24.25 倍和11.78 倍。A、B、C 的月均土壤含水量变化规律显示, 地被物对土壤含水量的影响随季节的不同而不同, 不同地被物可 以增加或减少土壤水分。年均土壤含水量排列顺序是: B( 27.09%) >A( 26.46%) >C( 26.27%) 。不同处 理水量平衡各分量有较大差异。在2002 年降雨量1 808.5mm 的情况下, A、B、C 的年总径流深分别 为1 245.24、1 453.81 和1 383.23mm, 蒸散量分别为562.74、347.91 和413.82mm, 土壤蓄水年变化 量分别为0.52、6.78 和11.45mm。

关键词: 水土保持, 地被物, 土壤水分动态, 百喜草, 水量平衡

Abstract: The effects of Bahia grass (Paspalum notatum) and its litter on dynamics of soil moisture and water balance were studied by using Lysimeter in the slopeland of red soil.The results indicated that surface runoff coefficient of Bahia grass’ coverage (A), Bahia grass’ mulching (B) and CK (C) was 1.35%, 2.78% and 32.74% respectively.Surface runoff of C was 24.25 times of A and 11.78 times of B.Changing laws of monthly mean soil moisture of A, B and C showed that the effects of ground cover on soil moisture were different because of seasons and that different ground cover could increase or decrease soil moisture.Their annual mean soil moisture was B (27.09%)>A(26.46%)>C(26.27%).There were obvious differences between every gradient of water balance.On condition that precipitation was 1 808.5mm in 2002, the total runoff depth of A, B and C was 1 245.24mm, 1 453.81mm and 1 383.23mm respectively; their evapotranspiration was 562.74mm, 347.91mm and 413.82mm respectively; their annual soil moisture variation was 0.52 mm, 6.78mm and 11.45mm respectively.

Key words: soil and water conservation, ground cover, dynamics of soil moisture, Bahia grass,
water balance

中图分类号: 

  • S714.7