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中国西部环境和生态科学研究计划 >
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草地农业生态系统健康评价 >
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http://hdl.handle.net/2239/72635
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| Title: | 贺兰山西坡不同海拔梯度上土壤-植物系统磷相关性的研究 |
| Other Titles: | Research on the Relationship between Phosphorus in Soil and Plant Syetem at Different Altitudes on the Western Slope of Helan Mountains |
| Authors: | Wang, Bin(王斌)
Zhong, Zhiyu(周志宇)
Zhang, Gang(张冈) |
| Keywords: | 贺兰山(Helan mountains)
全磷(Total phosphorus)
速效磷(Available phosphorus)
植物群落(Plant community) |
| Issue Date: | Dec-2009 |
| Publisher: | 《安徽农业科学》2009，37（35）：17630-17634,17674. |
| Abstract: | [中文摘要]：以阿拉善左旗境内贺兰山中段(西坡)及其山前地带主要草地类型为研究对象,于2004年7～8月沿贺兰山中段西坡以海拔高度、草地类型、土壤类型和草地利用方式等因素为指标分别在亚高山草甸、荒漠化草原和草原化荒漠上设置了5个调查样地,在各样地上对土壤全磷、速效磷、植被空间变异特征、植物含磷量以及土壤的理化性质等进行了系统的野外植物营养学试验和室内分析研究。结果得出:在海拔1 370～2 940 m,土壤全鳞、速效磷含量随海拔高度的降低而降低。回归分析显示,土壤速效磷与土壤含水量、全磷、全氮、有机质、群落中植物密度、地上生物量、盖度之间呈极显著正相关,与土壤容重、pH值呈极显著负相关。研究区植物群落的组成具有明显地带性垂直分布的规律,随着海拔的降低,各样地植被的物种组成和优势种均有较大的差异,其中,Ⅰ样地优势种为矮生嵩草和珠芽蓼;Ⅱ样地为沙生针茅和冷蒿;Ⅲ样地为沙生针茅、糙隐子草和珍珠柴;Ⅳ样地为小画眉草、狗尾草和霸王;Ⅴ样地为黄蒿和小叶锦鸡儿。
[英文摘要]：With major types of grassland along the middle range of Halan mountain in Alex as the study objects,the indices of altitude,grassland types,soil types and grassland use types on western slope of Helan mountains from July to August of 2004 were used and 5 sample plots were set on the subalpine meadow,desertification steppe and steppe desert.The filed plant nutrition test and indoor analysis were made on the total phosphorus in soil,available phosphorus,the spatial variation characteristics of vegetation,phosphorus content in plants and the physicochemical properties of soil on each sample plot . The results indicated that the mean values of total phosphorus in soil and available phos phorus in soil decreased with decreasing elevation at the altitudes of 1 370- 2940 m. Regressi on analyses indicated that available phosphorus content in soil had a strong positive relationship with soil water content, total phosphorus in s oil, total nitrogen in soil, organic matterin soil, plant population density, plant aboveground biomass, plant cover . Meanwhile, it was negatively correlated with soil density and soil pH. The vertical zonation of vegetation is strongly devel oped along the middle range of Helan mountain in Alex, InnerMongolia. With decreasing elevation, the vegetati on compositions and dominant s pecies had changed evidently in study region. Kobresia hum ilis and Polygonum viviparnm were dominant s pecies in p l ot Ⅰ at 2 940 m. S tipa glareosa and A rtem isia frigidewere the dominant species in plot Ⅱ at 2100 m. S tipaglareosa, Cleistogenes squarrosa and Salsola passerinewere the dominant s pecies in p l otⅢ at 1 700 m; Eragrostis poaeoides, Setaria viridis and Zygophyllum xanthoxylum were the dominant s pecies in plotⅣ ( exclution) at 1 370 m. A rtem isia scoparia and Caragana m icrophylla were thedominant s pecies in plot Ⅴ ( grazing) at 1 370 m. |
| URI: | http://hdl.handle.net/2239/72635 |
| Appears in Collections: | 科学论文
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