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对沈阳市郊东陵、于洪、苏家屯、新城子四区蔬菜栽培15年左右的日光温室土壤有机碳组成特征进行了研究,以相应温室外的露地栽培土壤为对照,结果表明:日光温室蔬菜栽培的有机肥用量远远高于温室外露地栽培。随着有机肥用量增加,温室土壤水溶性碳、腐殖酸碳的增加比例小于胡敏素碳的增加比例。各区温室土壤总有机碳、非腐殖质碳、腐殖质碳数量的平均值分别是温室外露地的1.76～3.06倍、3.41～5.23倍、1.57～2.99倍。温室土壤中非腐殖质所占比例较对照露地的大,其水浮物碳占总有机碳比例是对照露地的1.80～2.63倍,温室和露地土壤水溶性物质碳占总有机碳的百分比大多低于2%。温室土壤胡敏酸碳、富里酸碳、胡敏素碳数量均高于对照露地,但有1/3以上的温室土壤H/F低于对照露地土壤。由于不同农户的水、肥管理水平差异较大,不同温室土壤的总有机碳及各组分的碳变异性较大。
The characteristics of soil organic carbon in greenhouse under 15 years cultivation of vegetables in Dongling, Yuhong, Sujiatun and Xinchengzi suburb of Shenyang were studied. The results showed that the sunlight greenhouse The amount of organic fertilizer used in vegetable cultivation is much higher than that of greenhouse cultivation. With the increase of the amount of organic fertilizer, the increase proportion of soil water-soluble carbon and humic acid carbon in greenhouse was less than that of humin. The average values of soil total organic carbon, non-humus carbon and humus carbon in each greenhouse were 1.76 ~ 3.06 times, 3.41 ~ 5.23 times and 1.57 ~ 2.99 times than those in greenhouse. The proportion of non-humus in the greenhouse soil is larger than that in the control. The percentage of total organic carbon in water floats is 1.80-2.63 times that of the control. Most of the water-soluble carbon in greenhouse and open-field soil is lower than the percentage of total organic carbon 2%. The soil humic acid carbon, fulvic acid and humic acid carbon in greenhouse were higher than the control, but more than one third of the greenhouse soil H / F was lower than the control exposed soil. Due to the great difference in water and fertilizer management level among different farmers, the carbon variability of total organic carbon and its components in different greenhouse soil is larger.