轻质绿化混凝土肥力的优化配比试验

利用正交试验探讨了耕植土、有机肥、外加剂等因素对轻质绿化混凝土的有机质、速效N、速效P、速效K的含量等主要肥力指标及180 d pH值的影响.结果表明:各因素对轻质绿化混凝土肥力有明显影响,其中有机肥对有机质、速效N、速效P的影响均达到极显著水平,对速效K的影响达到显著水平;耕植土对有机质的影响达到极显著水平,对速效N、速效K的影响均达到显著水平,对速效P的影响不大;外加剂对肥力指标有一定影响,但未达到显著水平.各因素对180 d pH值没有显著影响.综合最优水平组合为A3B3C3,即耕植土24.2 kg、有机肥3.5 kg、外加剂0.7 kg,通过主要物理性质和黑麦草生长质量的验证性试验,说明了最优组合具有良好的植物相容性.

Orthogonal experiment of the optimized ratios of fertility of light-weight planting concrete

Orthogonal experiment was conducted to investigate the effects of cultivated soil,organic fertilizer,additional materials on major fertility indices such as organic matter,content of rapidly available N,P,K and 180 days′ pH value of light-weight planting concrete.The effects of organic fertilizer on organic matter,rapidly available N and P were extremely significant,its effect on rapidly available K was significant.The effect of cultivated soil on organic matter was extremely significant,its effects on rapidly available N and K were significant,while its effect on rapidly available P was insignificant.The effect of additional materials on fertility indices was insignificant.There was no significant effect of those factors on 180 days′ pH value.The optimized comprehensive level combination was A_3B_3C_3 which means 24.2 kg of cultivated soil,3.5 kg of organic fertilizer,0.7 kg of additional materials.The test on major physical characteristics and red darnel growth quality proved the excellent plant compatibility of optimized combination.