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首页> 外文期刊>Arid Land Research and Management >Soil organic carbon density in arable and non-arable lands under varied soil moisture and temperature regimes in cold arid to sub-tropical areas of Western Himalaya, India.
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Soil organic carbon density in arable and non-arable lands under varied soil moisture and temperature regimes in cold arid to sub-tropical areas of Western Himalaya, India.

机译：在印度喜马拉雅山西部干旱，亚热带地区，土壤水分和温度变化的情况下，耕地和非耕地的土壤有机碳密度。

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摘要

Soil organic carbon (SOC) density and soil microbial biomass carbon (SMBC) were studied in 0-30 and 0-100 cm depths in arable and non-arable lands under four soil moisture and temperature regimes (SMTR) [i.e., cryic-ardic (wet period <90 days; mean soil temperature <8 degrees C), udic-mesic (wet period 180-270 days; mean soil temperature 8-15 degrees C), udic-thermic (wet period 180-270 days; mean soil temperature 15-22 degrees C), and ustic-hyperthermic (wet period 90-180 days; mean soil temperature >22 degrees C)] and four soil erosion regimes (slight, moderate, severe, and very severe) in cold arid to subtropical conditions of Western Himalayas, India. The study revealed that SOC density (1.2+or-0.2 kg m-2) was the lowest in ustic-hyperthermic and highest in udic-mesic (4.2+or-0.8 kg m-2) and udic-thermic (4.2+or-0.7 kg m-2) conditions. SOC density in aridic-cryic was higher in arable than in nonarable lands, whereas the trend was reverse in other soil moisture and temperature regimes. Spatial variability of SOC was higher in nonarable than arable lands. Across SMTR and land uses, both SOC density and SMBC were significantly higher on slightly to moderately than severely to very severely eroded surfaces. In 0-30 cm depth, SOC density was highest in Dystrudepts (17.6 kg m-2) and lowest in Hapludalfs (1.9 kg m-2), whereas in 0-100 cm depth, Dystrudepts (32 kg m-2) and Haplustepts (4.2 kg m-2) hold the highest and lowest SOC density, respectively. SMBC moved parallel to SOC density. Study claims that agriculture with good soil and water conservation measures has potential to sequester SOC on the hills.
机译：在四种土壤水分和温度制度（SMTR）下，在耕地和非耕地的0-30和0-100 cm深度研究了土壤有机碳（SOC）密度和土壤微生物生物量碳（SMBC）。 （湿润期<90天;平均土壤温度<8摄氏度），udic-mesic（湿润时期180-270天;平均土壤温度8-15摄氏度），udic-therm（湿润时期180-270天;平均土壤）温度介于15-22摄氏度之间），并且在低温干旱至亚热带地区有高温高渗（湿润期90-180天;平均土壤温度> 22摄氏度）]和四种土壤侵蚀状况（轻度，中度，重度和非常重度）印度喜马拉雅山西部的情况。研究表明，SOC密度（1.2+或-0.2 kg m -2 ）在高铁尿液中最低，而在乌迪斯邦中最高（4.2+或-0.8 kg m -2） ）和体温（4.2+或-0.7 kg m -2 ）条件。耕地的SOC密度高于非耕地，而其他土壤水分和温度制度则相反。非耕地土壤有机碳的空间变异性高于耕地。在SMTR和土地利用中，SOC密度和SMBC值在轻微到中等程度上均显着高于严重到非常严重侵蚀的表面。在0-30 cm的深度中，Dystrudeptepts（17.6 kg m -2 ）的SOC密度最高，而Hapludalfs（1.9 kg m -2 ）的SOC密度最低，而0-深度为100 cm时，Dystrudeptepts（32 kg m -2 ）和Haplustepts（4.2 kg m -2 ）分别具有最高和最低的SOC密度。 SMBC与SOC密度平行移动。研究声称，采取良好水土保持措施的农业有可能隔离山丘上的有机碳。

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