所有作者：王金满
作者单位：中国地质大学（北京）土地科学与技术学院
论文摘要：In order to study the application mode of By-product from Flue Gas Desulfurization (BFGD) used to reclaim sodic soils， the field plot experiment of sunflower was conducted to analyze effects of two application modes， applying BFGD in batches and applying BFGD only once， on the physical and chemical properties of two sodic soils (in sodic soil I， ESP=１９。８； in sodic soil II， ESP=４６。９) and the sunflower production。 The results indicated that ESP and pH of the top ４０cm soil decreased significantly， and germination rate， dry matter weight and sunflower production increased after applying BFGD in all the treatments。 The soil EC in the top ４０ cm soil appreciably increased in initial stage after applying BFGD。 However， it was lower after two years than that in initial stage and soil EC was less than， or close to the value before the experiment。 The mode of applying BFGD in batches was better than that of applying it only once because the mode of applying BFGD in batches could decrease the accumulation of soil salts and promote the dissolution of CaSO４ 。The ESP of sodic soil I and sodic soil II reduced to １３。５ and １４。９ respectively， their pH reduced to ８ and ８。４ respectively， and sunflower production increased by １６３０。８０ kg昲m-２ and １３１５。６５ kg昲m-２ respectively in the most effective treatments of applying BFGD in batches。 In contrast to the mode of applying BFGD only once， the soil pH decreased by ４。７６％ and ２。３３％ in sodic soil I and sodic soil II， ESP decreased by ８。７８％ and ２４。７５％， germination rate increased by ４。７１％ and １７。５７％ and sunflower production increased by １２。９５％ and １７。５２％。If the drainage was in good condition and the byproduct was applied at right rate， the salts of soil top layer would not be accumulated。
关键词： 脱硫副产物 施用模式 碱土 改良 向日葵
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