摘要
以内蒙古霍林河南露天煤矿排土场为研究对象,分别测试了种植4a、7a、9a、12a、21a的人工沙棘林下土壤,并与未种植沙棘之外排土(复垦0a)为对照,研究了不同年限沙棘林下0~20cm、20~40cm土层中的p H值、有机质、碱解氮、速效磷、速效钾的含量及其差异。结果表明:人工沙棘林确实具有改良土壤的作用,时间越长,效果越明显,种植21a后,0~20cm土层中有机质、碱解氮、速效钾含量达到或超过周边天然草地水平,p H值与速效磷接近天然草地水平;20~40cm土层效果比0~20cm稍差,但仍有明显的效果,这说明在霍林河南露天煤矿排土场边坡生态恢复过程中,种植沙棘林恢复土壤效果较好,具有推广意义。
We collected the soils of artificial sea-buckthorn woods that were planted 4 years,7 years,9years,12 years and 21 years in the waste dump of Huolinhe south-pit mine,Inner Mongolia,and took marginal land as control. Then we analyzed the value of p H,soil organic matter,alkali-hydrolyzable nitrogen,rapidly-available phosphorus,and rapidly-available potassium in 0 ~ 20 cm and 20 ~ 40 cm soil layers. The results showed that artificial sea-buckthorn woods improved the soil better with the increase of yeas. The value of soil organic matter,alkali-hydrolyzable nitrogen and rapidly-available potassium in 0 ~ 20 cm soil layers are similar to the natural grass surrounding; the value of p H and rapidly-available phosphorus are also close to the control. The values in 20 ~ 40 cm soil layers are slightly less than 0 ~ 20 cm,but the effect is obvious. This study demonstrated that planting sea-buckthorn woods improved the soil fertility during the ecological restoration progress of the waste dump of opencast coal mine area in south of Huolin river,and is worth to be widespread.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2017年第12期150-154,共5页
Journal of Arid Land Resources and Environment
基金
内蒙古自治区国土资源厅重点研究项目(内财建[2012]1965号)资助
关键词
土壤肥力
人工沙棘林
排土场
soil fertility
artificial sea- buekthorn woods
waste dump
