海藻酸增效剂对尿素在土壤中转化及损失的调控
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(1.土肥资源高效利用国家工程实验室,山东农业大学资源与环境学院,山东 泰安 271018;2.江西省农业科学院土壤肥料与资源环境研究所,江西 南昌 330200;3.曲阜市农业局,山东 曲阜 273100)

作者简介:

张静(1994-),女,山东潍坊人,硕士研究生,研究方向为植物营养机理与调控。E-mail:1570249712@qq.com。通讯作者:李絮花,E-mail:lixh@sdau.edu.cn。

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基金项目:

基金项目:“十三五”国家重点研发计划课题(2016YFD0200402)。


Effects of Alginate Synergist on the conversion and loss of urea in soil
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(1.National Engineering Laboratory for Efficient Utilization ofSoil and FertilizerResources,College of Resources andEnvironment,Shandong AgriculturalUniversity,Tai′ an Shandong271018;2.Institute of Soil Fertilizer and Resource Environment,Jiangxi Academy of Agricultural Sciences,Nanchang Jiangxi330200;3.Qufu AgriculturalBureau,Qufu Shandong273100)

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    摘要:

    通过海藻酸增效剂对尿素在土壤中的形态转化特征及其氨挥发损失的试验,研究了海藻酸增效剂对氮肥增效的作用机理,为进一步开发利用海藻酸资源、提高氮肥利用率提供科学依据。试验以山东潮土和安徽黄褐土为供试土壤,以海藻酸增效尿素为供试肥料,采用室内培养方法,设置不施肥(CK)、普通尿素(U)和海藻酸增效尿素(AU)3个处理,定期采集土壤样品测定土壤酰胺态氮、铵态氮、硝态氮含量及氨挥发量。结果表明,1)海藻酸增效剂能有效延缓土壤中尿素的水解。2)与普通尿素处理(U)相比,AU处理氨挥发总量降低3.74%~16.10%,在潮土和黄褐土上氨挥发速率分别降低 11.54%~ 21.57%和 18.18%~81.81%。3)AU处理铵态氮的峰值在潮土和黄褐土上分别出现在第 5和 7 d,其峰值提高了 4.86%~ 12.02%。4)海藻酸增效剂抑制了第5~ 7 d内土壤铵态氮向硝态氮的转化。综上所述,海藻酸增效剂可以减缓尿素的水解,降低氨挥发速率和损失量,抑制培养前期铵态氮向硝态氮的转化并且在不同的土壤中对氮素转化的影响效果不同,对黄褐土中氮素转化的抑制作用更明显。

    Abstract:

    It is tested that the effects of Alginate Synergist on the conversion characteristics of urea in soil and the loss ofammonia volatilization,which provides scientific basis for further development and utilization of alginate resources andthe improvement of the nitrogen fertilizer utilization rate.Indoor incubation method was adopted using fluvo -aquic soil and yellow-cinnamon soil as testedsoil,alginic acid -enhanced urea as testedfertilizer.Three treatments were setup: no fertilizerapplication(CK),common urea(U)and alginic acid -enhanced urea(AU).Soil samples were collected periodically duringthe incubation period to test the contents of soil amidenitrogen,ammoniumnitrogen,nitrate nitrogen and the volatilizationvolume of ammonia.The results showed that1)Alginate Synergist effectively delayed the process of urea hydrolysis.2)Compared with common urea treatment(U),the total amount of ammonia volatilization from AU treatment decreased by 3.74% to16.10%,and the ammonia volatilization rate decreased by 11.54%~ 21.57% and 18.18%~ 81.81% in fluvo-aquic soil and yellow-cinnamon soil,respectively.3)The peak value of ammonium nitrogen in the fluvo -aquic soil and yellow-cinnamon soil appeared on the 5 and 7d,respectively,and the content increased by 4.86%~12.02%.4)AlginateSynergist inhibited the conversion of ammonium nitrogen to nitrate nitrogen in soil from 5 to 7d.Inconclusion,AlginateSynergist can slow down the process of the hydrolysis ofurea,decrease the rate and loss amount of ammonia volatilization,and inhibit the conversion of ammonium nitrogen to nitrate nitrogen in the early stage ofincubation.Alginate Synergist has differenteffects on nitrogen transformation in differentsoils,with more efficient effect in yellow -cinnamonsoil.

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张静,冀建华,李絮花,陈亮.海藻酸增效剂对尿素在土壤中转化及损失的调控[J].中国土壤与肥料,2020,(6):228-233.

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  • 收稿日期:2019-11-04
  • 最后修改日期:
  • 录用日期:2020-01-11
  • 在线发布日期: 2021-01-21