牡蛎壳土壤调理剂对土壤理化性状和萝卜产量及效益的影响

Effects of Oyster Shell Soil Conditioner on the Physical and Chemical Properties of Soil,the Yield and Benefit of Radish

当前农田土壤酸化加剧问题引发人们广泛关注。在酸性土壤蔬菜田开展田间试验,研究牡蛎壳土壤调理剂不同用量(0、750、1 500、2 250、3 000 kg·hm^(-2))对土壤理化性状和萝卜产量及经济效益的影响。结果表明:与对照相比,施用牡蛎壳土壤调理剂的土壤pH值提高0.1~0.5单位,可交换酸下降0.25~0.69 cmol·kg^(-1),交换性钙含量提高12.26~45.52 mg·kg^(-1),萝卜增产3.2%~18.0%,净效益增加1 444~10 165元·hm^(-2)。综上,在酸性土壤上施用牡蛎壳土壤调理剂能够明显缓解土壤酸化,有效改善土壤理化性状,综合考虑土壤改酸效果与生产效益,该区域萝卜施用1 500~2 250 kg·hm^(-2)牡蛎壳土壤调理剂是合适用量。

At present,the aggravation of soil acidification in farmland has aroused widespread concern.The field experiment in the vegetable field with acidic soil was carried out to study the effects of different dosages of oyster shell soil conditioner(0,750,1500,2250,3000 kg·hm^(-2))on the physical and chemical properties of soil,the yield of radish and economic benefits.The results showed that:compared with the control group,the pH value of soil applied with the oyster shell soil conditioner increased by 0.1-0.5 units,the exchangeable acid decreased by 0.25-0.69 cmol·kg^(-1),the exchangeable calcium content increased by 12.26-45.52 mg·kg^(-1),the yield of radish increased by 3.2%-18.0%,and the net benefit increased by 1444-10165 yuan·hm^(-2).In summary,the application of oyster shell soil conditioner on the acidic soil could significantly alleviate the soil acidification and effectively improve the physical and chemical properties of soil.By considering the effect of soil acid modification and production efficiency comprehensively,1500-2250 kg·hm^(-2) oyster shell soil conditioner applied to radish was the appropriate dosage.