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以长期定位试验为基本材料 ,研究了 9年连续施用有机肥对紫色水稻土铁、锰、铜、锌形态的影响。结果表明 ,有机肥是土壤铁、锰、铜、锌的良好给源。紫色水稻土长期施用有机肥与单施化肥比较 ,土壤中的全铁、全锰变化不大 ,全锌提高了 5 5%～ 30 0 % ,交换态铁、碳酸盐结合态铁、有机态铁、无定形结合态铁分别提高了 1 5%～ 12 7%、2 4 %～ 8 9%、11 6 %～19 5%、32 5%～ 72 5%。锰、锌的各形态数量均有不同程度的增加。同时 ,长期施用有机肥增大了土壤铜的消耗 ,全铜含量有下降的趋势。
Taking long-term experiment as the basic material, the effects of continuous application of organic manure on iron, manganese, copper and zinc forms in purple paddy soil for 9 years were studied. The results show that organic manure is a good source of soil iron, manganese, copper and zinc. The long-term application of organic manure on purple paddy soil showed little change in total iron and total manganese and soil total zinc by 55% ~ 30% compared with the single application of chemical fertilizers. Exchangeable iron, carbonate bound iron, organic Iron and amorphous bound iron increased by 15% -127%, 24% -89%, 11 6% -195%, 32 5% -72 5%, respectively. Manganese, zinc, the number of various forms have increased in varying degrees. At the same time, long-term application of organic fertilizer increased soil copper consumption, total copper content decreased.