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为了阐明施加铁炉渣对稻田土壤养分动态及水稻产量的影响,以福州平原稻田为研究区域,采用原位采样与室内分析对铁炉渣施加后稻田土壤速效氮、速效磷、速效钾、有效硅、微生物量碳、溶解性有机碳、土壤交换性钙、交换性镁以及水稻产量进行测定。结果表明,对照,2,4,8Mg/hm2铁炉渣施加样地速效氮含量平均值分别为7.90,10.85,16.61,8.96mg/kg;速效磷含量的平均值分别为3.13,4.57,5.06,5.54mg/kg;速效钾含量的平均值分别为141.37,136.99,141.77,141.17mg/kg;有效硅含量的平均值分别为329.66,920.63,1 093.41,1 294.58mg/kg;交换性镁离子含量的平均值分别为0.046,0.053,0.048,0.040cmol/kg;交换性钙离子含量的平均值分别为0.032,0.033,0.045,0.046cmol/kg;微生物量碳含量的平均值分别为523.64,719.19,669.49,623.91mg/kg;溶解性有机碳含量的平均值分别为210.49,260.31,263.49,259.67mg/kg。施加铁炉渣增加了土壤速效氮、速效磷、有效硅、微生物量碳、溶解性有机碳和土壤交换性钙的含量,但对土壤交换性镁和速效钾含量的影响不显著,与此同时还增加了水稻产量。可见,铁炉渣可作为与特定肥料施加结合的有效土壤改良剂。
In order to clarify the effect of applying iron slag on the dynamic changes of soil nutrients and rice yield in paddy soils, the paddy fields in Fuzhou Plain were used as the research area. After in-situ sampling and laboratory analysis, the contents of available nitrogen, available phosphorus, available potassium, Microbial biomass carbon, dissolved organic carbon, soil exchangeable calcium, exchangeable magnesium, and rice yield. The results showed that the average contents of available nitrogen in samples of 2, 4, 8 Mg / hm2 iron slag were 7.90, 10.85, 16.61 and 8.96 mg / kg, respectively. The average contents of available phosphorus were 3.13, 4.57, 5.06 and 5.54 mg / kg. The average contents of available potassium were 141.37, 136.99, 141.77 and 141.17 mg / kg, respectively. The average effective silicon contents were 329.66, 920.63, 1093.41 and 1 294.58 mg / kg, respectively. The average values of exchangeable calcium ion were 0.032,0.033,0.045 and 0.046cmol / kg respectively. The average values of microbial biomass carbon were 523.64, 719.19 and 669.49, respectively , 623.91mg / kg; average dissolved organic carbon content were 210.49,260.31,263.49,259.67mg / kg. The application of iron slag increased soil available nitrogen, available phosphorus, available silicon, microbial biomass carbon, dissolved organic carbon and soil exchangeable calcium, but had no significant effect on soil exchangeable magnesium and available potassium, and at the same time Increased rice yield. It can be seen that iron slag can be used as an effective soil conditioner in combination with specific fertilizers.