沼液农田消解利用对辣椒产量、品质及土壤肥力的影响

Effect of biogas slurry farmland disposal and utilization on pepper's yield,quality and soil fertility

通过田间试验,研究施用沼液对大棚辣椒（Capsicum frutescensL.）产量、品质和土壤肥力的影响,探讨沼液农田消解安全用量。结果表明,沼液可全部替代辣椒生产所需化学肥料,施用相当于2~3倍化肥氮的沼液量可获得与常规化肥处理相近的辣椒产量,且辣椒品质得到改善,省肥节本效益明显;沼液消解利用还明显提高了土壤有机质、全氮、速效氮、磷、钾含量;从充分利用土壤最大限度地消解沼液,同时又能避免过量施用沼液造成二次污染的风险综合考虑,推荐大棚辣椒当季安全消解沼液量为900 t/hm2,可减排N 530.6kg/hm2,P2O537.8 kg/hm2,K2O 311.4 kg/hm2,COD 900 kg/hm2。

Study of farmland disposal volume of biogas slurry and its effect on pepper＇s yield,quality and soil fertility during the production in greenhouse were investigated through a field plot experiment.The results showed that biogas slurry could be a substitute for chemical fertilizer that applied in pepper production system,the yield of pepper in the treatment with biogas slurry amount equivalent to 2-3 times of the chemical nitrogen fertilizer was similar to the yield in the treatment with conventional chemical nitrogen fertilizer.Moreover,quality of pepper was improved,and the chemical fertilizer and cost could be saved.Furthermore,the application of biogas slurry farmland disposal also significantly increased soil organic matter,total nitrogen,available nitrogen,available phosphorus and potassium content.The recommendation amount of biogas slurry was 900 t·hm-2[i.e.,nitrogen 530.6 kg·hm-2（three times more than the conventional mineral nitrogen fertilizer）,P2O5 37.8 kg·hm-2,K2O 311.4 kg·hm-2,COD 900 kg·hm-2] in greenhouse pepper production system.