土壤调理剂对早稻生理特性及重金属吸收的影响

Effects of Soil Conditioner on the Physiological Characteristics and Heavy Metal Uptake of Early Rice

为研究“众望”土壤调理剂在湘中地区早稻上的施用效果,在湘潭和株洲分别开展田间小区试验。试验设常规施肥(T1)、常规施肥+生石灰(T2)、常规施肥+“众望”土壤调理剂(T3)3个处理,研究土壤调理剂对湘中地区早稻生长和重金属吸收的影响。结果表明:“众望”土壤调理剂可有效促进湘中地区早稻生长,提高产量的效果不明显,但能显著提高土壤pH值,缓解土壤酸化,显著降低土壤和稻米的重金属镉含量,与常规施肥相比,施用生石灰降低土壤总镉15.74%~20.64%,施用“众望”土壤调理剂降低土壤总镉18.45%~23.25%。

Field plot experiments were carried out in Xiangtan and Zhuzhou to study the effect of applying"Zhongwang"soil conditioner on early rice in central Hunan.Three treatments were designed,including conventional fertilization,conventional fertilization+quicklime,and conventional fertilization+"Zhongwang"soil conditioner,to study the effects of soil conditioner on the growth and heavy metal uptake of early rice in central Hunan.The results showed that the soil conditioner promoted the growth of early rice in central Hunan,with insignificant yield-increasing effect.However,it significantly increased soil pH,alleviated soil acidification,and reduced the cadmium content in soil and rice grain.Compared with conventional fertilization,the additional application of quicklime and"Zhongwang"soil conditioner reduced the total cadmium in soil by 15.74%-20.64%and 18.45%-23.25%,respectively.