Effects Of Amendment On Pb, Zn Contaminated In Rice Plant And Soil

The experiment adopted the method of field and pot for research,through the determination of various parts of rice dry matter weight,in different parts of rice Pb,Zn content of soil.exchangeable and carbonate bound states of Pb,Zn and soil physical and chmical properities, in order to determine the suitable soil improver,provide a theoretical basis for rice production Pb,Zn polluted area.The results were as follows:(1)Field experiment showed that,amendment could change the heavy metal in different parts of the Pb,Zn content and yield of rice.Silkworm excrement and bacterial residue could decrease the rice of each part of Pb,Zn content and increase the rice yield,there was significant different with CK.(2)Pot experiment showed that,3kinds of bacterial residue treatments could decrease Pb,Zn content in different parts of rice, in the maturing stage,3kinds of bacterial residue treatments decreased the Pb,Zn content in grain by17.41%-24.60%,22.59%-27.26%compared to the CK.3kinds of bacterial residue treatments could improved all parts of rice dry matter weight,and they could increased dgrain production from78.61%to121.75%compared to the CK.3kinds of bacterial residue treatments could decreased the soil exchangeable Pb,Zn content,in the in the maturing stage,15%treatment could decreased45.81%exchangeabke Pb compared to the CK,the value of47.30mg/kg;10%and15%treatments could dereased42.59%and49.92%the soil exchangeable Zn compared to the CK.3kinds of bacteria residue treatments could significantly increased soil organic matter,soil available potassium, available phosphorus and nitrogen contents and improved the pH value of soil.