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首页> 外文期刊>Eurasian Soil Science >Distribution of active organic matter in the soil profiles of natural and agricultural ecosystems
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Distribution of active organic matter in the soil profiles of natural and agricultural ecosystems

机译：天然和农业生态系统土壤剖面中活性有机物的分布

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摘要

The amount of active (potentially mineralizable) organic carbon (C-0) in the 1-m-deep layer of typical chernozem, dark-gray forest soil, and gray forest soil was estimated for virgin plots and arable land. It was shown that C-0 is mainly found in the topsoil (0-20 cm), where its pool reaches 32-60% of the total amount of C-0 in the layer of 0-100 cm. The C-0 content and its portion in the total organic carbon decrease down the soil profiles. The disturbance of the structure of the pool of active organic carbon-the loss of the moderately mineralizable (0.1 > k (2) > 0.1 day(-1)) fraction-takes place in the upper horizon of plowed soils. The total pool of C-0 in the upper meter of typical chernozem under cropland and under meadow-steppe cenosis comprises 2.8 and 5.2 t/ha, respectively; for the dark gray forest soil under cropland and forest, it reaches 5.5 and 9.8 t/ha, respectively; and for the gray forest soil under cropland and forest, 2.4 and 3.4 t/ha, respectively. The pools of C-0 in the typical chernozem. dark gray forest, and gray forest soils are comparable with the values of the annual C-CO2 emission from the soils of these zones.
机译：估算了典型黑钙土，深灰色森林土壤和灰色森林土壤的1-m深层中的活性（可能矿化的）有机碳（C-0）的量，用于原始田地和耕地。结果表明，C-0主要存在于表土（0-20厘米）中，在0-100厘米的层中，其库层占C-0总量的32-60％。在土壤剖面中，C-0含量及其在总有机碳中的比例降低。活性有机碳库结构的扰动-中度可矿化（0.1> k（2）> 0.1 day（-1））馏分的损失发生在耕作土壤的上层。在农田和草甸草原上，典型黑钙土上层米的C-0总库分别为2.8 t / ha和5.2 t / ha。耕地和森林下的深灰色森林土壤分别达到5.5吨/公顷和9.8吨/公顷;耕地和森林下的灰色森林土壤分别为2.4吨/公顷和3.4吨/公顷。典型的黑水晶中的C-0池。深灰色森林和灰色森林土壤与这些地区土壤每年的C-CO2排放值相当。

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