【摘要】 通过盆栽试验的方法,研究了牛粪和植物种类对石灰性土壤中铁肥形态转化及其有效性的影响。结果表明,牛粪施用改变了土壤中铁(含外源铁)的有效性及其在各形态铁间的分配。从长期的观点来看,牛粪施用能提高土壤铁的有效性,有利于土壤铁有效供给的维持。与花生相比,油莱对土壤铁具有更高的利用和活化能力,种植油菜后,土壤交换态铁被耗竭,而有效铁、氧化锰结合态铁和无定形氧化铁结合态铁的含量明显提高。有机肥的合理施用和铁效率差异性植物间的轮作或间作是增加、维系土壤铁有效性的重要农艺措施。更多还原

【Abstract】 The availability and transformation of compound iron fertilizer and FeSO4. 7H2O in the present of cow dung and different plants in calcareous soil were determined by using soil culture method. The results indicated that the application of cow dung caused changes in Fe availability and distribution among varied Fe forms of soil iron. According to the results, cow dung application can improve and maintain available Fe content at length. Compared with Peanut, rape has more powerful absorption and mobilization ability to soil iron. After cultivation, Exch-Fe was exhausted in contrast to MnOX-Fe and AOFe-Fe were significantly increased in soil. Based on above results, proper use of manure, intercropping or rotation of crops with different Fe-efficiency are two important measures to improve and remain Fe availability, in soil.更多还原