期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：199
期号：3
页码：032101
DOI：10.1088/1755-1315/199/3/032101
语种：English
出版社：IOP Publishing
摘要：The watering gradient is an important factor affecting the composition and structure of the soil seed bank community. The germplasm resources in the soil seed bank have their corresponding water germination intervals. The soil seed bank of Tianjin Guangang Forest Park was selected as the research object and different watering gradients were set to test. Through statistical analysis and regression equation model, we could analyse and evaluate the morphological features of arbor species in soil seed bank under different watering gradients and find out the soil moisture interval which was most suitable for the restoration effect of soil seed bank in Tianjin. The study results showed that: (1) the watering gradient was set to 1000 mL, the arbor population in the experimental dish had the highest plant height, the largest canopy cover and the best arbor community; when the water content was less than 1000 mL, it couldn't meet the water demand of plant growth and the number of seed germination was greatly reduced; while above 1000mL, the soil was in flooded state, inhibited the germination of some seeds; (2) under the same watering gradients, the average height and canopy cover of Fraxinus chinensis species showed great advantages compared with Robinia pseudoacacia L. and Koelreuteria paniculate species; (3) the average height and canopy cover of three arbor species were positively correlated by regression analysis, and when the watering gradient was set to 1000mL, its correlation was best.
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