长期定位施肥对非石灰性潮土全硫动态变化的影响

试验基于30a的长期定位试验,于2007研究了长期定位施肥对非石灰性潮土全硫动态变化的影响.结果表明,单施无机氮肥、单施有机肥及有机肥配施无机氮肥、氮磷钾配施可明显提高土壤全硫含量,且施用的有机肥和氮肥越多,土壤全硫含量增加的幅度越大.单施高量有机肥和低量有机肥的处理分别比对照平均提高了39.9%和20.2%.高量有机肥配施高、低量无机氮肥,低量有机肥配施高、低量无机氮肥土壤全硫含量分别比对照平均提高了92.2%、115.6%、70.6%和115.1%.氮磷钾配施和氮磷配施土壤全硫含量分别比对照平均提高了57.8%、116.8%,而且氮磷配施土壤全硫积累量最高,0～20cm和20～40cm土层分别为883.3mg/kg和265.2mg/kg.

Effects of Long-term Located Fertilization on dynamic changes of total Sulphur in the non-calcareous Fluro-aquic soil

This experiment was done in the 30 years fixed position experiment of non-calcareous fluro-aquic soil in 2007. The effects of long-term located fertilization on dynamic changes of total S were studied. The results indicated that: the contents of soil total Sulphur was improved in the treatment which application of inorganic nitrogen fertilize, organic fertilizer and combined application of organic fertilizer and inorganic nitrogen fertilizer and combined application of of nitrogen and phosphorus and potassium fertilizer.But the more organic fertilizer and inorganic nitrogen fertilize was used, the more contents of soil total Sulphur was increased.The contents of soil total Sulphur in the treatment of the higher organic fertilize and the lower organic fertilize was improved average 39.9% and 20.2% respectively,compares with the CK.It can be increased average 92.2%,115.6%,70.6% and 115.1% respectively in the treatment of combined application of higher organic fertilizer and higher inorganic nitrogen fertilizer and lower inorganic nitrogen fertilizer ,lower organic fertilizer and higher inorganic nitrogen fertilizer and lower inorganic nitrogen fertilizer compares with the CK. The contents of soil total Sulphur was increased 57.8% and 116.8% in the treatment of N2PK, N2P, but the accumulation of the total Sulphur was highest in the treatment of N2P compares with other treatments, it has attained by 883.3 mg.kg-1 and 265.2 mg.kg-1 in the 0-20 cm and 20-40 cm soil layers.