文章基本信息

标题：EFFECTS OF SINGLE AND COMBINED AMENDMENTS ON CADMIUM AVAILABILITY AND CROP UPTAKE IN THE PURPLE AND BLACK SOILS UNDER CORN-WHEAT ROTATION
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作者：Xuehui Lai ; Fangli Wang ; Xiurong Miao 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2021
卷号：30
期号：8
页码：10034-10048
语种：English
出版社：PSP Publishing
摘要：Soil cadmium (Cd) pollution endangers the hu- man health through the food chain and has become a serious concern in China. The study was to investi- gate the effects of amendments on Cd availability and uptake by crop in contaminated soils after cal- cined lime (C), hydroxyapatite (H) and pig manure (P) were applied alone and combination to the purple and black soils under corn-wheat rotation. Results showed that crop biomass, Cd concentration, soil pH, DTPA extractable Cd and Cd fractions were signifi- cantly changed when applying amendments into both soils. Calcined lime and hydroxyapatite could significantly decline Cd availability in both soils re- gardless of crop type, and application of hydroxyap- atite and pig manure increased the crop biomass More obviously Cd fractions changes were observed in corn growing period, especially applied with cal- cined lime and hydroxyapatite. Calcined lime in- creased carbonate-bound (Carb-Cd) Cd fractions re- sulted from 17.17% to 29.23% and from 17.26% to35.38%, and hydroxyapatite increased Fe-and Mnoxide-bound (Ox-Cd) Cd fractions from 29.54% to 42.91% and from 19.32% to 36.54% in the purple and black soils. However, the exchangeable (Ex-Cd) and organic matter-bound (Org-Cd) Cd fractions were slightly increased after applying pig manure into both soils. Moreover, combined amendments prepared from alkaline materials and organic fertiliz- ers could decrease grain Cd concentrations and in- crease crop biomass simultaneously. The immobili- zation effects of combined amendments were more remarkable in the black soil, such as hydroxyapatite + pig manure (HP) and calcined lime + hydroxyap- atite + pig manure (CHP). This research demon- strated that Cd availability in soil and Cd uptake by crop root were the main factors to affect Cd immo- bilization, while the translocation in crop could hardly influence the Cd immobilization.
关键词：Combined amendment;Cadmium;Corn-wheat rotation;Immobilization;Crop uptake