摘要
分析了玉米秸发酵基质的主要物理性状、颗粒组成、电导率(EC)、pH值以及氮、磷、钾含量等,并以草炭为对照进行了比较。结果表明,玉米秸发酵基质容重为0.16 g/cm^3;总孔隙度为78.5%,通气孔隙度为34.3%,持水孔隙度为44.2%;玉米秸发酵基质中大颗粒质量(直径大于2 mm)占总质量的39.9%,而小颗粒质量(直径小于0.5 mm)占24.3%;EC为3.96 mS/cm,pH值为7.76,具有较强的酸碱缓冲能力;全氮、全磷和全钾含量分别为2 241 mg/kg、1953 mg/kg和4760 mg/kg。与草炭相比,玉米秸发酵基质使用时,须降低其通气孔隙度、EC和pH,从而作为草炭的替代物,用于园艺作物的育苗和栽培。
Physical properties, particle size, electronic conductivity （EC）, pH and nitrogen （N）, phosphorus （P） and potassium （K） of maize stalk fermented substrate were analyzed （peat as control）. The results showed that dry bulk density of maize stalk fermented substrate was 0.16 g/cm^3, similar with peat; total porosity of maize stalk fermented substrate was 78.5%, aeration porosity was 34.3%, water retaining porosity was 44.2%; the weight proportion of larger particle （diameter larger than 2 mm） and smaller particle （diameter smaller than 0.5 mm） in total particle weight were 39.9% and 24.3% respectively; EC was 3.96 mS/cm, pH was 7.76, and it had powerful buffering capability; total N, P and K contents in maize stalk fermented substrate were 2 241 mg/kg, 1 953 mg/kg and 4 760 mg/kg respectively. The results implied that maize stalk fermented substrate could be a substitute of peat, a growing media or nursing media for horticultural crop when decreased its aeration porosity, EC and pH.
出处
《长江蔬菜》
北大核心
2008年第05X期48-50,共3页
Journal of Changjiang Vegetables
基金
国家科技支撑计划项目(2006BAD07804)
关键词
玉米秸
发酵基质
物理性状
化学性状
Maize stalk
Fermented substrate
Physical properties
Chemical properties
