草地学报

›› 1999, Vol. 7 ›› Issue (3): 211-216.DOI: 10.11733/j.issn.1007-0435.1999.03.006

• 研究报告 • 上一篇    下一篇

放牧率对土壤饱和导水率及其空间变异的影响

牛海山, 李香真, 陈佐忠   

  1. 中国科学院植物研究所生态中心, 北京, 100093
  • 出版日期:1999-08-15 发布日期:2012-07-19
  • 基金资助:
    中国科学院“九五”特别支持项目(KZ95T-04-03)和重大项目(KZ951-A1-301)和国家自然科学基金重大基金项目(49790020)的资助

Effects of Stocking Rate on Soil Saturated Hydraulic Conductivity and Its Spatial Variation

Niu Haishan, Li Xiangzhen, Chen Zuozhong   

  1. Ecological Research Centre, Institute of Botany, Chinese Acadmy of Sciences, Beijing, 100093
  • Online:1999-08-15 Published:2012-07-19

PDF

摘要： 本文研究放牧对土壤饱和导水率及其对饱和导水率空间变异的影响。结果表明,在2m及2m以上相邻两点之间土壤饱和导水率相互独立,在各个方向均如此。呈自然对数正态分布。放牧对饱和导水率和饱和导水率的标准差有极显著的作用,一元方差分析p=0.003和0.004。随着放牧率的增大,饱和导水率降低,与放牧率呈极显著的回归关系。回归方程为Y=e-2.72-0.0822x,其中Y为饱和导水率(mm/s)·x为放牧率(羊/hm2)。随着放牧率的增大,土壤饱和导水率的变异程度并未出现趋势性的变化。

关键词: 放牧, 放牧率, 土壤饱和导水率

Abstract: The effects of grazing rate on the soil saturated hydraulic conductivity and its spatial variation were investigated in a grazing trial which began in 1990 at Baiyinxile Rancho,Inner Mongolia.China.The stocking rate were 0,1.33,2.67,4.0,5.33,6.67 sheep unit/ha and rotation grazing treatn1ent was conducted.The saturated hydraulic conductivity between two adjacent points,with separation distance of 2m or above in all directions are independent.The saturated hydraulic conductiviy was in-normally distributed and all data were natural logarithmically transformed be fore statistical analysis.Grazing had significant effects on soil saturaed hydraulic conductivity(p=0.003 of one way analysis of variance)and its standard deviation(p=0.004 of one way analysis of variance).The soil saturated hydraulic conductivity decreased with the increasing of stocking rate,and the two demonstrated significant regression relation.The regression equation was Y=e-2.72-0.0822x,where Y was saturated hydraulic conductivity in mm/second and X was stocking rate in sheep unit/ha.The stocking rate and the spatial variation of saturated hydraulic conductivity did not lead a linear relation.

Key words: Grazing, Stocking rate, Soil saturated conductivity