Floristic And Microbial Diversity In Different Coal Mine Overburdens And Adjacent Natural Forest Of Chhattisgarh, India

K. Chandra
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Abstract

In the present study, percent AMF (Arbuscular Mycorrhizal Fungi) colonization and spore density in different overburden vegetations and in natural forest was evaluated to study the pattern of recovery of vegetation at overburdens. Total eight forest species were planted on coal mine overburdens aged 2, 3 and 5 years located in nearby areas of Korba, India. Sissoo (Dalbergia sissoo), Peltaphorum (Peltaphorum ferrugineum) and Bamboo (Dendrocalamus strictus) were best in harboring highest number of AMF. The mean root colonization in tree species was increased 61.98% in 3 years and 110.23% in 5 years compared with the species of 2 year. The dominant AMF were Acaulospora scrobiculata and Rhizophagus irregularis in 2 year overburdens and Funneliformis mosseae, Gigaspora and Sclerocystis in older overburdens and forest soil. The diversity index of AMF was found 1.80, 2.14 and 2.49 in 2, 3 and 5 year overburdens respectively while the diversity index of other soil fungi was found 1.61 in 2 years, 1.73 in 3 year and 2.10 in 5 year aged of overburdens compared to natural forest (2.21). Total 11, 25 and 29 ground species were recorded from 2, 3, 5 year overburden respectively and 25 species from the site of natural forest. The root colonization in ground vegetation was found 28.03%, 31.86% and 39.43% in 2, 3 and 5 year old re-vegetated overburden respectively in comparison to natural forest (29.08%). The status of soil pH and phosphorus was also ameliorated in older dumps.
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印度恰蒂斯加尔邦不同煤矿覆盖层和邻近天然林的区系和微生物多样性
通过对不同覆盖层植被和天然林中丛枝菌根真菌(AMF)定植率和孢子密度的研究,探讨了覆盖层植被恢复的规律。在位于印度Korba附近地区的2、3和5年的煤矿覆盖层上种植了8种森林。黄竹(Dalbergia Sissoo)、黄竹(Peltaphorum ferrugineum)和竹(Dendrocalamus strictus)是AMF数量最多的品种。与2年的树种相比,3年和5年的平均根系定植量分别增加了61.98%和110.23%。2年复盖层的优势菌群为scobiculata和Rhizophagus不规则菌,较老复盖层和森林土壤的优势菌群为moseforis、Gigaspora和Sclerocystis。土壤真菌多样性指数在2年、3年和5年覆盖层中分别为1.80、2.14和2.49,其他土壤真菌多样性指数在2年、3年和5年覆盖层中分别为1.61、1.73和2.10,高于天然林的2.21。2年、3年、5年复盖层分别记录到11种、25种、29种,天然林样地记录到25种。2、3、5年龄复盖植被的根定植率分别为28.03%、31.86%和39.43%,高于天然林(29.08%)。旧垃圾场的土壤pH和磷的状况也有所改善。
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