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人工桉林土壤孔隙状况及水分变化分析
作者: 熊柳梅1 a  2  3  谢振兴2  黄金生1 a  刘永贤1  周柳强1 a  谭宏伟1 b *  黄美福1 a  
单位: (1 广西农业科学院 a 农业资源与环境研究所; b甘蔗研究所:南宁 530007;2 广西大学 农学院  南宁 530005;  
关键词: 人工桉林  土壤孔隙度  土壤水分变化  红壤  丘陵区  华南  
分类号:S157.9
出版年,卷(期):页码:2013 ,44 ( 12 ): 页码:2031-2035
摘要:

【Objective】The influencing factors regarding soil total porosity (STP) and soil water content (SWC) of eucalyptus plantation(EP)were studied to provide references for water utilization of eucalyptus planting in Hilly Red Soil Region of south China. 【Method】In the same climate zone, soil samples of surface soil layer(A), illuvium (B)and parent material (C) in the lower slope, upper slope and middle slope were collected to measure soil total porosity (STP) and soil water content (SWC). Soil water content variation and influencing factors were analyzed from the vertical and horizontal direction. 【Result】STP of EP,NF and PF stands was 45.9%, 41.4%, 55.3% and their average SWC was 13.3%, 13.4%, 15.5% in order. SWC of three forestlands had no significant differences in the profile as well as in the slope position, but significant differences existed in the surface soil among forestry stands. In the horizontal direction,SWC of surface layer and degree of covering was significantly positively correlated. 【Conclusion】Total covering degree of canopy, herb and litter layer is one of the most critical factors for soil water content change in the surface soil of stands.

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