Soil microorganism and soil respiration characteristics of two kinds urban green space in Tianjin

doi:10.14088/j.cnki.issn0439-8114.2019.22.012

Abstract

Abstract: Soil carbon emission rates and soil microbial populations of two urban green space in Tianjin Sophora japonica Linn.-Pyrus i, f. woods and Sophora japonica Linn.-Ginkgo biloba L. woods were determined in June, July and August to determine soil respiration dynamics and its influencing factors. The results showed that day and night variation of soil respiration in two types of urban green spaces was obvious. Soil carbon emission was greater during the daytime than at night, and the daytime variation range was greater than that at night. During the observation period, the soil respiration rate variation of Sophora japonica Linn.-Pyrus i, f. woods was 4.01, and the soil respiration rate variation of Sophora japonica Linn.-Ginkgo biloba L. woods was 4.76, and the average monthly maximum occurred in August. The average soil respiration rates of Sophora japonica Linn.-Pyrus i, f. woods and Sophora japonica Linn.-Ginkgo biloba L. woods were 2.01 and 1.94 μmol/（m²·s）, respectively. This indicated that Sinkgo japonica Linn.-Pyrus i, f. woods had a higher carbon emission than Sophora japonica Linn.-Ginkgo biloba L. woods. The total amount of soil microbes was greater in Sophora japonica Linn.-Pyrus i, f. woods. There was extremely obvious correlation between the seasonal changes of soil respiration rate and the number of soil bacterium. Soil respiration rate were significantly positive to actinomycetes and fungi.

Key words: urban green space, soil respiration rate, day and night variation, soil microorganism

CLC Number:

S731.2

WEI Jia-yu, WU Zhong-liang, CHEN Xin-tong, WANG Miao, ZHAO Liang-yu, SUN Hao-ran, LI De-sheng. Soil microorganism and soil respiration characteristics of two kinds urban green space in Tianjin[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(22): 49-53.

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