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对农业可持续发展系统来说,土壤碳库容量是很重要的因子,其变化主要发生在易氧化碳库(EOC)里。在设施蔬菜施肥长期定位试验基础上,研究了长期施用有机肥和化肥对设施内土壤易氧化有机碳的影响。结果表明,除了长期不施肥的土壤外,其它施肥处理土壤易氧化有机碳含量均随着土层深度的增加而降低。A组(有机肥组)各土层以ANP(有机肥+氮磷化肥)处理易氧化有机碳含量最高,其次是ANPK(有机肥+氮磷钾化肥)、ANK(有机肥+氮钾化肥),AN0(单施有机肥)含量最低;B组(不施有机肥组)中BNP(氮磷化肥)易氧化有机碳含量最高,其次是BNK(氮钾化肥)、BNPK(氮磷钾化肥)。与不施肥处理相比,长期施用有机肥能够显著提高0—60cm各层土壤易氧化有机碳的含量,且施用有机肥以及有机肥与氮磷钾化肥配施效果要优于不施有机肥处理。
Soil carbon pool capacity is a very important factor for an agricultural sustainable development system, with changes mainly occurring in EOC. On the basis of long-term fertilization experiments in vegetable facilities, the effects of long-term application of organic manure and chemical fertilizers on soil organic carbon in facilities were studied. The results showed that except for the long-term non-fertilizing soil, the content of soil vulnerable organic carbon in other fertilizers decreased with the increase of soil depth. The content of organic carbon in the soil of Group A (organic fertilizer) treated with ANP (organic fertilizer + nitrogen and phosphorous fertilizer) was the highest, followed by ANPK (organic fertilizer + NPK fertilizer), ANK (organic fertilizer + , And organic nitrogen (ANO) was the lowest. In group B (no organic fertilizer), BNP (nitrogen and phosphorus fertilizer) had the highest content of organic carbon, followed by BNK (nitrogen and potassium fertilizer), BNPK . Long-term application of organic manure could significantly increase soil organic carbon content in 0-60cm layer compared with non-fertilization treatment, and application of organic manure and organic manure and NPK fertilizers were better than those without organic manure .