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- Title
甘肃省榆中盆地不同人工植被类型下的 土壤养分时空特征.
- Authors
韦体; 卜磊; 吴登宇; 陈宏福; 高丹丹; 刘红海; 徐红伟; 蔡勇; 杨具田; 郭鹏辉
- Abstract
The characteristics of soil nutrients in Yuzhong Basin,Gansu Province,northwest semi‐arid region were studied in this project,to provide a theoretical basis for restoring and treating its fragile ecological environment. Soil samples with different depths(0—10,10—20,20—30 cm)underneath eight kinds of widely distributed plants(alfalfa,pear,ginkgo,pine,cypress,peony,rose,and clove)from four artificial vegetation types(grassland,deciduous forest,coniferous forest,and shrub) in Yuzhong Basin,Gansu Province were analyzed to study time and space distribution of nutrients in the soil samples. The results showed that the nutrients of the soil samples decreased with the soil depth,which displayed the average available potassium content(130. 62 mg/kg)> the average available phosphorus content (76. 16 mg/kg)> the average ammonium nitrogen content(50. 04 mg/kg),and the average organic matter content was 18. 15 g/kg;The seasonal variation characteristics were prominent,except arganic matter the soil nutrients in spring was higher than that in winter. The pH value in different seasons and different soil layers did not change much,and maintained at 7. 84—8. 68,slightly alkaline. Electrical conductivity increased with the soil depth,while organic matter decreased with the soil depth. Among the eight plant sample plots,an extremely significant linear quantitative relationship existed in the alfalfa sample plots between available potassium and ammonium nitrogen,soil organic matters,electrical conductivity. Soil nutrients from other plant plots had few interactions with physical and chemical factors. In conclusion, significant differences existed in the distribution of soil nutrients in time and space,and specific synchronization existed between soil nutrients and vegetation types.
- Subjects
GANSU Sheng (China); ARID regions; SOIL depth; SOIL sampling; ELECTRIC conductivity; DISTRIBUTION (Probability theory); GRASSLAND soils; SHRUBS; GINKGO
- Publication
Journal of Henan Agricultural Sciences, 2021, Vol 50, Issue 11, p79
- ISSN
1004-3268
- Publication type
Article
- DOI
10.15933/j.cnki.1004‐3268.2021.11.010