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首页> 外文会议>World Congress of Soil Science >Aggregation, carbohydrate, total and particulate organic carbon changes by cultivation of an arid soil in Central Iran
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Aggregation, carbohydrate, total and particulate organic carbon changes by cultivation of an arid soil in Central Iran

机译：通过伊朗中部的干旱土壤培养聚集，碳水化合物，总和颗粒有机碳变化

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摘要

The objectives of this paper were to determine the response of soil quality indicators and organic carbon (OC) distributions within different aggregate classes to changes in land use from desert soils to cropland occurring in the Abarkooh plain, Central Iran. Composite soil samples of the desert soil, wheat and alfalfa fields were taken from three different depths and soil quality indicators, including aggregate stability (MWD), OC, carbohydrate, particulate organic carbon existent in macro (POCmac)and mieroaggregates (POCmic) in these soils were determined. Conversion of desert soils to croplands resulted in a significant decrease in electrical conductivity (EC), but an increase in MWD, OC, carbohydrate, POC_(mac) and POC_(mac) contents. OC content increased with increased aggregate size and the aggregate; OC ratio in cultivated and desert soils was highest in the 1-2 and <0.05 mm aggregates, respectively. The improvement soil quality in cropland is due to the long-term use of irrigation water and soil fertilization and also the poor SOM in desert soils. The results of this study further indicate the POCmac, POCmic and POCmac/POCmjC ratio are sensitive parameters that reflect differences of soil aggregation, SOM quality and tillage intensity insoils of this region. These parameters are more reliable indicators of soil quality than OC in reclaimed desert soils.
机译：本文的目的是确定土壤质量指标和有机碳（OC）在不同综合类别中的响应，以在伊朗中央伊朗中阿卡杜哈平原中发生的土壤利用土地利用的变化。沙漠土壤，小麦和苜蓿领域的复合土壤样品从三种不同的深度和土壤质量指标中取出，包括聚集稳定性（MWD），OC，碳水化合物，宏（Pocmac）和Mieroggegates（Pocmic）中存在的颗粒状有机碳确定了土壤。沙漠土壤到农田的转换导致在电导率（EC）一个显著减少，但增加了MWD，OC，碳水化合物，POC_（MAC）和POC_（MAC）的内容。 oc内容随着骨料大小和骨料的增加而增加;栽培和沙漠土壤中的oC比例分别在1-2和<0.05mM的聚集体中最高。农田的改善土壤质量是由于灌溉水和土壤施肥的长期使用，也是沙漠土壤中的可怜的索波。该研究的结果进一步表明了Pocmac，Pocmic和Pocmac / PocmJC比率是敏感参数，反映了该地区的土壤聚集，SOM质量和耕作强度的差异。这些参数比OC在再生沙漠土壤中的土壤质量更可靠。

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