Characteristic of four trace elements in soil and dominant plants form degraded grassland, enclosed grassland on the north bank of Qinghai Lake

Abstract

Abstract: In order to study on the relationship between plant shapes and copper, zinc, iron, manganese and other trace elements, so we selected degraded grassland on the north bank of Qinghai Lake as our test sample and fence enclosure as control, through investigated of the types of grass plots and analyzed copper, zinc, iron, manganese and other trace elements in typical plants. The results showed that the contents of copper, zinc, iron, manganese and other trace elements have an accumulation of the plants on degraded grassland compared with that on enclosed grassland, and have a negative correlation between plant shapes-height and ground with biomass. Such as: in Lanniwan, Cu were 10.480 and 7.275 mg/kg in plant form degraded grassland and enclosed grassland, but in soil Cu were 13.99 and 24.19 mg/kg, plant height was 13.3 and 17.3 cm, respectively. In degraded grassland, the correlation coefficient between the plant height and Cu, Zn was -0.987 3 and -0.986 6, respectively. Trace elements nutrient-accumulation in plant form degraded grassland is the result of degraded and also one of the cause grassland accelerated degradation. It is also an “emergency” response for mineral elements nutrition needs change.

CLC Number:

LI Tian-cai, CAO Guang-min, LIU Qing-hai, ZHOU Guo-ying, SHI Sheng-bo, ZHANG De-gang. Characteristic of four trace elements in soil and dominant plants form degraded grassland, enclosed grassland on the north bank of Qinghai Lake[J]. Acta Prataculturae Sinica, 2012, 21(5): 213-221.

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