【摘要】 试验选择客土回填后的山地荒沟,在已建植的雀麦属禾草草地设置试验区,连续2年研究禾草种植对客土理化性质的影响,结果得出:自然条件下,春季播种雀麦属禾草,可以加速山区荒沟植被恢复,改善客土理化性质,播种后2年,地上生物量可达3018.0kg/hm2,0~10cm土层中pH值明显降低,全氮、碱解氮含量显著提高,达0.562g/kg和30.89mg/kg;播种后3年,植株密度与草地覆盖度达到最大,0~10cm土层土壤容重显著减小,达1.282g/cm3,总孔隙度显著增加,0~25cm土层土壤紧实度明显降低,同时,0~10cm土层速效磷含量下降速度相对减缓,土壤有机质、速效钾含量显著提高,达到9.603g/kg和189.20mg/kg。更多还原

【Abstract】 Studies on Bromus inermis and Bromus riparius in the barren ravine were conducted with the foreign-soil physical and chemical characters in 2004 and 2005.There were good changes on the foreign-soil physical and chemical characters and the vegetation in three years after planting grasses naturally in the spring.Grass biomass reached 3018.0kg/hm2,pH descended significantly,and total and available nitrogen in the 0~10cm were 0.562g/kg and 30.89mg/kg respectively in two years.In three years after planting grasses,grass density and coverage were the most,soil bulk density was the least 1.282g/cm3 in the 0~10cm,soil porosity increased in the 0~10cm and soil compactiveness descended significantly in the 0~25cm.Soil organic matter and available potassium improved obviously,9.603g/kg and 189.20mg/kg respectively,and available phosphorous descended more slowly in the 0~10cm in the third planting year.更多还原