Immobilization of trace elements and lettuce growth in soil amended with activated dolomite phosphate rock fertilizers
文献类型： 外文期刊
作者： Cao, Yune 1 ; Liu, Ruliang 2 ; Song, Xueying 3 ; Mao, Xiaoyun 4 ; Stoffella, P. J. 5 ; He, Zhenli 5 ;
作者机构： 1.Ningxia Univ, Coll Agr, Yinchuan, Ningxia, Peoples R China
2.Ningxia Acad Agr & Forestry Sci, Inst Agr Resource & Environm, Yinchuan, Ningxia, Peoples R China
3.Shenyang Univ, Key Lab Reg Environm & Ecoremediat, Minist Educ, Shenyang, Peoples R China
4.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou, Peoples R China
5.Univ Florida, Indian River Res & Educ Ctr, Inst Food & Agr Sci, Ft Pierce, FL 34945 USA
关键词： activation of dolomite phosphate rock; essential elements; immobilization; lettuce; trace elements
期刊名称：JOURNAL OF PLANT NUTRITION （ 影响因子：2.277； 五年影响因子：2.157 ）
ISSN： 0190-4167
年卷期：
页码：
收录情况： SCI
摘要： Activation of low-grade phosphate rocks such as dolomite phosphate rock (DPR) with organic molecules of humic acid (HA) and sodium lignosulfonate (SLS) holds promise for developing slow release P fertilizers. Consequently, activated DPR fertilizers also contains multiple essential plant elements, including P, Ca, Mg, Zn, and Fe, while minimizing leaching losses of nutrients and heavy metals. Greenhouse experiments were conducted to examine the availability of Ca, Mg, and trace metals in soils applied with activated DPR fertilizers and subsequent response of lettuce (Lactuca Sativa L.) as compared with original DPR and water-soluble P fertilizers including superphosphates (SP) and diammonium phosphates (DAP). Application of activated DPR fertilizers stimulated the uptake of Ca, Mg, Zn, Fe, B by lettuce plants relative to original DPR and DAP. Potential toxic elements such as Cr, Cd, Ni, Pb, and Cu were mostly immobilized in soil without uptake by lettuce when applied with activated DPRs primarily due to increased soil pH, as compared with water soluble fertilizers such as DAP and SPs. Apparently, the activated DPR fertilizers offer advantages over original DPR materials and water-soluble P fertilizers in providing multiple nutrients with minimal adverse effects on soil and environmental quality.
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