沼液与有机肥配施对稻田磷、钾素径流损失的影响
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(农业农村部种养结合重点实验室 /江苏省农业科学院循环农业研究中心,江苏 南京 210014)

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周炜(1982-),男,江苏无锡人,助理研究员,硕士,主要从事农业生态与资源环境方面研究。E-mail:zwei@jaas.ac.cn。通讯作者:盛婧,E-mail:nkysj@hotmail.com。

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基金项目:国家重点研发计划课题(2018YFD0800105);江苏省自主创新资金(CX(20)2014)。


Effects of biogas slurry combined with organic fertilizer on runoff loss of phosphorus and potassium in paddy field
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(Key Laboratory for Crop and AnimalIntegratedFarming,Ministry of Agriculture and Rural Affairs/Recycling Agriculture Research Center,Jiangsu Academy of Agricultural Sciences,Nanjing Jiangsu 210014)

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    摘要:

    研究沼液、有机肥配施对稻田磷、钾损失的影响,拟明确降低稻田磷、钾元素损失的最佳配施措施。以太湖水稻土为研究对象进行盆栽试验,设置了空白对照(CK)、常规化肥(CF),100%沼液氮替代(N1),75%沼液 +25%猪粪有机肥氮替代(N2),50%沼液+ 50%猪粪有机肥氮替代(N3)和 100%猪粪有机肥氮替代(N4)6个处理,测定施肥后稻田田面水以及径流磷、钾浓度和流失量。结果显示,各施肥处理径流磷损失量大小依次为N4>N3>N1>CF>N2,其中 N4处理最高,达到 P 44.99 kg/hm2,N2处理最低,为 P 3.94 kg/hm2,仅为前者的8.76%;各施肥处理径流钾损失量大小依次为N1>N3>N4>N2>CF,最高为 N1处理的 K 43.48 kg/hm2,最低为 CF的 K 24.78 kg/hm2;各施肥处理产量无显著差异,处于同一水平。综合比较而言,N2处理可在保持一定产量的基础上显著降低径流磷、钾流失的风险,是一种比较适宜的施肥模式。

    Abstract:

    The effect of biogas slurry and organic fertilizer on the loss of P and K in rice field was studied,and the bestmeasures to reduce the loss of P and K weresought.A pot experiment was carried out on the paddy soil of TaihuLake.Sixtreatments were setup:blank control(CK),conventional fertilizer(CF),100% biogas liquid nitrogen replacement(N1),75% biogas liquid+25% pig manure organic nitrogen replacement(N2),50% biogas liquid+50% pig manure organicnitrogen replacement(N3)and 100% pig manure organic nitrogen replacement(N4).The results showed that the amount ofphosphorus loss in runoff of each fertilization treatment wasN4>N3>N1>CF>N2,among which N4 treatment was thehighest, reaching P 44.99 kg/hm2,N2 treatment was thelowest,which was only P 3.94 kg/hm2and 8.76% of theformer.The amountof K loss in runoff of each fertilization treatment wasN1>N3>N4>N2>CF,the highest was K 43.48 kg/hm2of N1treatment, the lowest was K 24.78 kg/hm2ofCF.There was no significant difference in the yield of different fertilizationtreatments.Ina comprehensivecomparison,N2 treatment can significantly reduce the risk of runoff phosphorus and potassium loss on thebasis of maintaining a certainyield,which is a more suitable fertilization mode.

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周炜,王子臣,宗焦,王国栋,盛婧.沼液与有机肥配施对稻田磷、钾素径流损失的影响[J].中国土壤与肥料,2020,(6):240-245.

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  • 收稿日期:2019-11-28
  • 最后修改日期:
  • 录用日期:2020-01-26
  • 在线发布日期: 2021-01-21