北京房山采石场渣土基质对高羊茅生长的影响

Effect of Quarry Waste Matrix on Growth of Festuca arundinacea in Beijing Fangshan

针对工程渣土产生量与日俱增,随意堆放,破坏植被,加剧水土流失等现状,利用工程渣土进行人工土壤的重建,实现工程渣土的减量化、资源化利用。以渣土粒径(A)、羊粪用量(B)、秸秆用量(C)、木炭粉用量(D)作为试验因子,采用4因素3水平进行正交试验,研究不同配比的渣土基材对高羊茅出苗率、生长高度及生物量的影响。结果表明,4因素对高羊茅出苗率、生长高度及生物量的影响程度大小顺序为:羊粪用量(B)>秸秆用量(C)>渣土粒径(A)<木炭粉用量(D)。适宜高羊茅生长的较优基质配方为A1B2C2D2,即渣土粒径为0～10mm,羊粪用量为9g,秸秆用量为220g,木炭粉用量为6g。试验表明,渣土粒径范围的增大,抑制了高羊茅出苗及生长;当秸秆用量处于中等水平(220g)或羊粪用量处理于中等水平(9.0)时,对出苗率、生长高度及生物量的影响最佳;木炭粉用量对于出苗率、生长高度及生物量的影响不显著。

Aimed at the present situation of the increase of the amount of the construction waste,optional stack,destroying vegetation,aggravating soil and water loss,engineering waste for the reconstruction of the artificial soil was used to realize the project of waste reduction and recycling use.In an orthogonally designed experiment of four factors,each at three levels,the effect of clinker particle diameter（factor A）,dosage of ovine dung（factor B）,the dosage of straw（factor C）,dosage of charcoal powder（factor D） was analyzed on the follow indices（variables）： rate of emergence,growth height,and biomass.The results showed that the order of importance of four factors on those indices（rate of emergence,growth height,and biomass） was： dosage of ovine dung（B）,the dosage of straw（C）,clinker particle diameter（A） and dosage of charcoal powder（D）.The optimum disposition was the combination A1B2C2D2,（clinker particle diameter in 0~10 mm,dosage of ovine dung at 9 g,the dosage of straw at 220 g,dosage of charcoal powder at 6 g）.The dosage which was at medium level（220 g） or the ovine dung was at medium level（9.0 g）showed a significant effect on the rate of germination and growth height.Test showed that the increase of the clinker size inhibited the emergence and growth;and the dosage of straw and ovine dung which was at medium level showed a significant effect on the rate of germination,growth height and biomasses.The dosage of charcoal powder had little influence on the rate of germination,growth height and biomass.