兰州大浪沟雨养生态试验示范区土壤养分状况研究

发布时间：2018-12-16 02:01

【摘要】：【目的】为了对兰州雨养生态区植被恢复与重建提供理论依据.【方法】以兰州市城关区青白石乡大浪沟为试验示范区,研究不同坡向(阴坡、半阳坡和阳坡)、不同土层深度(0~20、20~40、40~60、60~80cm)土壤养分的变化规律.【结果】0~80cm土层,土壤养分含量表聚现象明显,表现为,随着土层深度的增加而降低,且阴坡半阳坡阳坡.阴坡、半阳坡和阳坡的土壤有机质平均含量分别为:5.69、4.36、3.09g/kg;有效磷(P)平均含量分别为14.13、14.08、13.85mg/kg;速效钾(K)平均含量分别为:159.13、158.76、150.14mg/kg;水解氮(N)平均含量分别为:26.4、19.7、14.7mg/kg.【结论】大浪沟雨养生态试验示范区土壤养分含量总体偏低,土壤中速效K含量较高,有效P含量中等,有机质和水解N的含量极低,建议在植被恢复配置时,考虑耐瘠薄的品种,并适当施用有机肥料.
[Abstract]:[objective] to provide theoretical basis for vegetation restoration and reconstruction in Lanzhou rain-fed ecological area. [methods] taking Danggou in Qingbishi Township, Chengguan District, Lanzhou City as the experimental demonstration area, the different slope directions (shady slope, semi-sunny slope and sunny slope) were studied. The change rule of soil nutrient in different soil depth (0 ~ 20 ~ 20 ~ 40 ~ 40 ~ 40 ~ 60 ~ 60 ~ 60 ~ 80cm). [results] in 0~80cm soil layer, the phenomenon of apparent accumulation of soil nutrient content was obvious, which showed that the soil nutrient content decreased with the increase of soil depth, and the semi-sunny slope of shady slope. The average content of soil organic matter in shady slope, semi-sunny slope and sunny slope was 5.69 ~ 4.36 ~ 3.09 g / kg, and the average content of available phosphorus (P) was 14.13 ~ (14. 08) ~ 13.85 mg 路kg ~ (-1) 路kg ~ (-1), respectively. The average (K) content of available potassium was 159.13158.76150.14 mg / kg; The average content of hydrolyzed nitrogen (N) was 26.4m ~ (19. 7) ~ 14.7 mg / kg 路kg ~ (-1) respectively. [conclusion] the soil nutrient content was low, the available K content was higher and the available P content was medium in Danggou Rain Ecological experiment area. The content of organic matter and hydrolyzed N is very low. It is suggested that barren tolerant varieties should be considered in vegetation restoration and organic fertilizer should be applied appropriately.
【作者单位】：兰州市园林科学研究所;
【基金】：国家科技支撑计划专题项目(2011BAC07B05-5)
【分类号】：S158

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