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[目的]为将蚓粪应用于牧草栽培,研究牧草对蚓粪中Cu、Zn的吸收能力提供理论依据。[方法]采用盆栽试验研究不同牧草品种在Cu、Zn污染蚓粪基质中的生长及重金属吸收情况。采用原子吸收分光光度法测定植株中的Cu、Zn含量,用Statistic6.0统计软件包处理数据,进行方差分析、线性回归和相关性分析。[结果]墨西哥玉米的生物量和Cu、Zn总积累量最大。欧洲菊苣地上部分的Cu、Zn含量相对较高。紫花苜蓿南方型地上部分的Cu吸收率和欧洲菊苣地上部分的Zn吸收率最大。[结论]在试验条件下,串叶松香草、高丹草、冬牧70黑麦、墨西哥玉米能够较好生长并收获相对较高的生物量。各牧草品种对Cu、Zn污染蚓粪具有一定的耐性和对Cu、Zn具有较强的吸收能力。
[Objective] The purpose of this study was to provide a theoretical basis for the application of vermicompost to pasture cultivation and to study its ability to absorb Cu and Zn in vermicompost. [Method] The pot experiment was conducted to study the growth and heavy metal absorption of different forage species in vermicompost contaminated by Cu and Zn. The contents of Cu and Zn in plants were determined by atomic absorption spectrophotometry. The data were processed by statistical software Statistic6.0 and analyzed by variance analysis, linear regression and correlation analysis. [Result] The biomass and the total accumulation of Cu and Zn in Mexican corn were the largest. The European Cucurbit aboveground Cu, Zn content is relatively high. The Cu uptake in the aerial part of southern alfalfa and the Zn uptake in the aerial part of European chicory were the highest. [Conclusion] Under the experimental conditions, C. victories, sudangrass, wintergrass 70 rye and Mexican corn could grow well and harvest relatively high biomass. The forage varieties of Cu, Zn contaminated vermicompost has a certain tolerance and Cu, Zn has a strong absorption capacity.