Comparative characterisation of forest litter on sod-podzolic soils of Forest Experimental Dacha in RSAU–MAA named after K.A. Timiryazev

Q4 Agricultural and Biological Sciences Biulleten'' Pochvennogo instituta im VV Dokuchaeva Pub Date : 2022-09-25 DOI:10.19047/0136-1694-2022-111-185-204
V. Mamontov, A. Savichev, O. Efimov
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Abstract

Forest litter under linden and pine forests was studied at the Forest Experimental Dacha of the RSAU–MAA named after K.A. Timiryazev. Despite significant differences in physical and chemical parameters between the litter formed under the conditions of different forest communities, the properties of sod-podzolic soils formed under both vegetation types are quite similar. The litter under linden forest has higher ash content, it is less acidic and contains almost 2 times more exchangeable bases, the content of hydrogen and nitrogen is higher by 0.82 wt% and 0.66 wt%, respectively. The litter of linden and pine forests, according to the atomic ratios H : C, C : N and the degree of oxidation, are equal to 1.82, 30.3, -0.92 and 1.64, 45.7, -0.71, respectively; the litter of linden forests differs from litter of pine forests in the higher content of aliphatic, nitrogen-rich, reduced organic compounds. In the litter of linden forests concentration coefficients of phosphorus and magnesium 1.2 times higher; of carbon, potassium and aluminium – 1.3 times higher; of calcium – 1.4 times higher; of nitrogen – 1.8 times higher, and of silicon – 3 times higher, than in the litter of pine trees. However, the concentration factor of manganese in the pine forest litter is 1.9 times higher compared to the litter of linden. According to the results of UV spectroscopy, water-soluble organic matter of pine forest litter, unlike water-soluble organic matter of linden forest litter, is more enriched by components of aromatic origin. This is evidenced by higher values of SUVA254 and lower values of coefficients E2/E3 and E4/E6. 
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RSAU–以K.A.Timiryazev命名的MAA森林实验Dacha的sod灰化土壤上森林垃圾的比较特征
在以K.A.Timiryazev命名的RSAU–MAA的森林实验Dacha研究了椴树和松林下的森林垃圾。尽管在不同森林群落条件下形成的枯枝落叶的物理和化学参数存在显著差异,但在两种植被类型下形成的草皮灰化土的性质非常相似。椴树林下的枯枝落叶灰分较高,酸性较低,可交换碱含量几乎高出2倍,氢和氮含量分别高出0.82wt%和0.66wt%。根据原子比H:C、C:N和氧化程度,椴树和松林的枯枝落叶层分别为1.82、30.3、-0.92和1.64、45.7、-0.71;菩提林枯枝落叶与松林枯枝落叶的不同之处在于脂族、富氮、还原性有机化合物含量较高。在菩提林枯枝落叶层中磷和镁的浓度系数高出1.2倍;碳、钾和铝的含量高出1.3倍;钙含量高1.4倍;氮的含量是松树枯枝落叶的1.8倍,硅的含量是其3倍。然而,松林枯枝落叶中锰的浓度因子是椴树枯枝落叶的1.9倍。根据紫外光谱的结果,与椴树的水溶性有机物不同,松林枯枝落叶的水溶有机物更富含芳香族成分。SUVA254的较高值以及系数E2/E3和E4/E6的较低值证明了这一点。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
15
审稿时长
8 weeks
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