摘要
在未退化和已退化的草场进行围栏与不围栏的试验．结果表明，生物量的大小排序为：羊草围栏内＞羊草围栏外，退化羊草围栏内＞退化羊草围栏外，土壤氮、腐殖质、胡敏酸、富啡酸亦因生物量的增加而增加．其中，草场围栏内的胡敏酸及其官能团量增加显著．
Analyses were carried out to test biomass and soil samples in and outside sheep pasturing herb pens,on the normal and degraded grassfarms. The result shows that the amount of biomass at test sites ranges in such an ouder:in herb pens >outside herb pens > in degraded herb pens > outside degraded herb pens. The amount of nitrogin,humic substance,humic acid,and fulvic acid in the soils increases with increasing biomass,also following the above mentioned order. The content of humic acid and its functional groups in herb pen soils increases significantly and hence the pen soil is better in quality.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1997年第4期455-458,共4页
Acta Scientiae Circumstantiae
关键词
腐殖质
草场退化
grass farm,degradation,humic substance,functional groups,substitution amount.
