GAO Chao,ZHANG Yue-xue,CHEN Ji-shan,et al.Nitrogen Characteristics of Different PlantCommunities of Saline-Alkaline Grassland[J].HEILONGJIANG AGRICULTURAL SCIENCES,2012,(11):139-142.
盐碱化草地不同植物群落土壤氮素特征研究
- Title:
- Nitrogen Characteristics of Different PlantCommunities of Saline-Alkaline Grassland
- 文章编号:
- 1002-2767（2012）11-0139-04
- Keywords:
- saline-alkaline; plant community; nitrogen
- 分类号:
- S812.2
- 文献标志码:
- A
- 摘要:
- 为了盐碱化草地植被恢复与生态重建，探讨盐碱化草地不同植被群落土壤氮素的特征，对松嫩平原西部盐碱化草地5种植物群落覆盖下土壤有机质、全氮、速效氮含量进行分析研究。结果表明：5个植物群落土壤有机质含量均随土层加深而降低；0～20 cm土层的土壤全氮含量人工苜蓿群落>委陵菜+苔草群落>羊草+野大麦群落>稗草+菖蒲草群落>谷莠子+虎尾草群落；0～30 cm土层土壤速效氮含量人工苜蓿群落>委陵菜+苔草群落>稗草+菖蒲草群落>羊草+野大麦群落>谷莠子+虎尾草群落，其中苜蓿群落速效氮含量最高，为336.452 mg·kg-1；5个植物群落土壤C/N均小于15∶1，苜蓿群落的土壤C/N最小，只有8.75。
- Abstract:
- In order to research the saline-alkaline grassland community recovery and reconstruction and discuss the characteristics of the soil nitrogen under different vegetation communities,soil organic matter,soil total nitrogen and available nitrogen of five different plant communities of saline-alkaline grassland in Songnen Plain were studied.The results showed that the content of soil organic matter decreased with the increase of soil depth.The order of total nitrogen content of 0～20 cm layer was Medicago sativaL.>Potentilla discolor Bunge>Leymus chinensis>Echinochloa crusgalli(L.)Beauv.>Setaria viridis(L.)Beauv.The order of soil available nitrogen content of 0～30 cm layer was Medicago sativa L.>Potentilla discolor Bunge> Echinochloa crusgalli(L.)Beauv.>Leymus chinensis >Setaria viridis(L.)Beauv,the content of soil available nitrogen of Medicago sativa L.was 336.452 mg·kg-1.The C/N of the five plant communities were all lower than 15∶1,and the alfalfa community soil was only 8.75.
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备注/Memo
基金项目：国家牧草产业技术体系绥化综合试验站资助项目（CARS-35）；黑龙江省农业科技创新工程种子创新基金资助项目（2010-10）