【摘要】 研究了Pb在土壤 作物生态系统中的积累和迁移 ,并结合水稻绿色食品生产 ,进行了无机肥、有机肥和生物菌肥及其配比试验 .结果表明 ,土壤全Pb含量随土层的加深而逐渐递减 ,收获后土壤全Pb含量在 0～ 15和 15～ 30cm分别为 11 14和 9 37mg·kg-1.水稻根从土壤中吸收Pb ,并向茎、叶和籽粒中迁移 .在同一生长期 ,水稻植株不同部位全Pb累积态势为 :根 >茎叶 >籽粒 .在不同生长期 ,随水稻生长发育 ,全Pb含量缓慢增加 ,至收获时 ,6 0 6 14和辽粳 2 94籽粒中全Pb含量分别为 0 0 0 8和 0 0 0 7mg·kg-1,均低于绿色食品标准 .方差分析表明 ,品种间产量差异显著 ;不同处理间产量差异不显著 .试验结果表明 ,可以用有机肥或生物菌肥来代替无机肥进行水稻生产 .更多还原

【Abstract】 In this paper,the accumulation and translocation of lead in soil-crop ecosystems were studied through fertilization with chemical fertilizer,manure and bio-fertilizer.The results showed that the soil total Pb content was decreased with soil depth.It was 11.14 and 9.37 mg·kg -1 in 0～15 and 15～30 cm after harvest,respectively.Rice root absorbed lead from soil,and transferred it to stem-leaf and grain.The Pb content in rice plant was root>stem and leaf>grain,which was increased with rice growth.The grains of 606-14 and Liao 294 contained 0.008 and 0 007 mg·kg -1 of Pb,respectively,which is under the standard of green food.Variance analysis indicated that the grain yield of different varieties had a significant variance,but no significant variance was found among different treatments.It could be summarized that manure or bio-fertilizer could be the substitute of chemical fertilizer in producing rice.更多还原