摘要
通过对陕北半干旱黄土丘陵沟壑区封育流域内不同立地条件下枯落物现存量的测定与分析,研究了枯落物的影响因子及分布规律。对60个样地调查研究结果表明:枯落物现存量与坡度呈二次回归关系,枯落物现存量最小值出现在坡度25.5°的位置;阴坡枯落物现存量比阳坡高25.1%,沟坡枯落物现存量比梁坡高41.7%;地表生物量与枯落物现存量呈显著的正相关性(P<0.05);土壤含水量与枯落物现存量呈正相关性;土壤含水量与地表生物量两者的共同作用对枯落物现存量影响明显。
By determining the amount of vegetation litter in 60 plots in semi-arid loess hilly and gully region fenced watershed under different habitat conditions, the affecting factors of the litter and its distribution pattern were studied. Results showed that there was a quadratic regression relationship between slope and litter amount, and the smallest value occurred at 25.5 degree. The litter amount of northern slope was 25.1° more than that of southern slope and that of northern gully was 41.7% more than that of southern gully. The aboveground biomass showed a significant positive relationship with the litter amount （P〈0. 05）. The relationship between litter amount and soil moisture was same. The litter amount was highly affected by soil moisture and aboveground biomass.
出处
《草业科学》
CAS
CSCD
北大核心
2010年第4期20-24,共5页
Pratacultural Science
基金
"十一.五"林业科技支撑计划专题(2006BAD03A0302)
关键词
半干旱黄土区
枯落物现存量
地表生物量
土壤含水量
立地类型
semi-arid loess hilly and gully region
litter amount
aboveground biomass
soil moisture
habitat condition
