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For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Investigation and Research on Wild Edible Plant Resources in the Mountaintop Platform of Zhangjiajie Tianmenshan National Forest Park,Hunan Province LI Yuxuan, JIN Jia, HU Jian, CHEN Gongxi, XIANG Xiaomei Journal of Jishou University(Natural Sciences Edition)    2023, 44 (3): 46-53.   DOI: 10.13438/j.cnki.jdzk.2023.03.007 Abstract （265）      PDF（pc） （744KB）（123）       Knowledge map    Save In order to understand the current situation of wild edible plant resources in the mountaintop platform of Tianmenshan National Forest Park in Zhangjiajie,the wild edible resources in this area were statistically analyzed by field investigation,specimen collection and literature review.The results showed that there were 134 species of wild edible plants belonging to 102 genera and 49 families in the Mountaintop platform of Tianmenshan.Among them,Rosaceae,Compositae and Lily were the dominant families,and Rubus was the dominant genus.Herbs were the main life forms.The geographical composition of species is complex and diverse,with the largest proportion of endemic species in China.The edible category is mainly wild vegetables,and the nutritional value is the largest proportion of fiber.The edible part is mainly leaves,and the cooking method is mainly frying.The edible plant resources on the mountaintop platform of Tianmenshan are rich in species,diverse in cooking methods,and high in nutritional value. Reference | Related Articles | Metrics | Comments（0） Select Pollution Characteristics and Pollution Sources Analysis of SO2,O3 and NO2 in Hefei High-Tech Zone ZHENG Nina, XU Yaqi, PAN Lingyang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (3): 54-60.   DOI: 10.13438/j.cnki.jdzk.2023.03.008 Abstract （197）      PDF（pc） （4478KB）（108）       Knowledge map    Save In this paper,the atmospheric SO2,O3 and NO2 of Hefei High-tech Zone are continuously observed using long-path differential absorption spectroscopy system,and the characteristics of gas pollution and possible pollution sources are analyzed.The diurnal variation shows that SO2 is high at night and low during the day.The diurnal variation of NO2 shows a single peak and single valley type.The rush hour of off-duty traffic has certain effect on NO2.But the whole day concentration of NO2 is on the high side (35~45 μg/m) and the variation is small,so there exist  other important nitrogen oxide emission sources.The diurnal variation of O3 is obvious.Its daytime concentration is high,and the maximum value appears at 16:00 in the afternoon;the concentration is low at night,and the lowest value appears on the early morning.The concentration of NO2 and SO2 in winter is high because of low atmospheric boundary layer.In summer,photolysis reaction is intense,wet deposition is obvious,so the concentration of pollutants is low.On the contrary,the seasonal variation of O3 is contrary.The analysis of pollution sources shows that the high SO2 value is mainly related to the coal burning of rural residents in the northwest of the observation site and the unorganized emission of pharmaceutical companies and paint factories in the southeast of the observation site.However,the high value of NO2 in the east-northeast (wind speed > 6 m/s) wind direction is affected by the long-distance transmission from Hefei Wanneng Power Plant and vehicle exhaust emissions in busy urban areas.The wind speed and direction distribution of O3 and NO2are basically opposite.The correlation coefficient of NO2 and O3 is only -0.429 6.There are other important O3 precursor pollutants in the atmosphere of Hefei Hi-tech Zone. Reference | Related Articles | Metrics | Comments（0） Select Comprehensive Evaluation and Spatial Distribution Characteristics of Soil Fertility in Xiangxi Prefecture PENG Huan, ZHOU Ying, ZENG Hanyong, LUO Jin, LI Qiang, HE Jianwu Journal of Jishou University(Natural Sciences Edition)    2022, 43 (6): 38-44.   DOI: 10.13438/j.cnki.jdzk.2022.06.008 Abstract （440）      PDF（pc） （12300KB）（175）       Knowledge map    Save The comprehensive evaluation of soil fertility in Xiangxi autonomous Prefecture provides a basis for improving soil fertility and building high-quality farmland.Soil pH,organic matter,total nitrogen,available phosphorus,and available potassium were selected as evaluation indicators，combined with the index summation method,a comprehensive evaluation system of soil fertility is constructed,and the soil fertility is comprehensively evaluated.The results showed that the soil pH in Xiangxi Prefecture is acid,there is slight soil acidification,the content of organic matter is high,the content of total nitrogen is moderate,the content of available phosphorus and available potassium vary greatly,and the average content was high.The proportion of soil area with grade I,II,III and IV fertility in Xiangxi Prefecture was 17.66%,17.62%,8.21% and 56.51% respectively. 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