复合氨基酸增效剂与尿素配施对水稻幼苗生长及土壤氮素的影响
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(农田生态保育与污染防控安徽省重点实验室,安徽农业大学资源与环境学院,安徽合肥230036)

作者简介:

葛明慧(1992-),女,山东临沂人,硕士,主要从事植物营养与新型肥料研发相关研究。E-mail:1130105744@qq.com。通讯作者:章力干,E-mail:zhligan@ahau.edu.cn。

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基金项目:

基金项目:国家重点研发计划(2016YFD0200402,2018YFD0800301)。


Effects of combined application of compound amino acid synergist and urea on the growth of rice seedlings and soil nitrogen
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(Anhui Province KeyLaboratory of Farmland Ecological Conservation and Pollution Prevention,School of Resources and Environment,Anhui Agricultural University,Hefei Anhui230036)

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    摘要:

    为探讨氨基酸作为肥料增效剂在水稻生长过程中的增效作用,以复合氨基酸溶液为主要材料,通过室内盆栽试验,研究复合氨基酸增效剂与普通尿素配施对水稻幼苗生长及土壤养分的影响。结果表明,与不施肥(CK1)相比,施用 5%复合氨基酸增效剂(A),水稻幼苗株高、叶绿素含量(SPAD)、根系生长指标、地上部干重和氮磷钾累积吸收量均随移栽时间延长呈显著增加趋势,其中株高增幅为 11.1%~ 18.1%,地上部干重增幅为 9.03%~24.00%,地上部氮磷钾累积吸收量分别增加了 32.3%~57.0%、50.7%~ 74.0%和 19.0%~40.5%。与单施普通尿素(U)相比,复合氨基酸增效剂与普通尿素配合施用(AU),移栽前期水稻幼苗株高、根系生长指标增加显著,移栽后期 SPAD增加显著,地上部干重和氮磷钾累积吸收量均随移栽时间延长呈增加趋势。在同等氮素条件下,AU处理不同取样期氮肥利用率为 8.24%~31.50%,均高于 U处理(6.08%~28.10%)。此外,AU处理根际土壤全氮含量随移栽时间延长由 0.93 g/kg降至 0.91 g/kg,降幅低于 U处理;AU处理根际土壤全氮和有效磷含量均高于非根际土壤,表明添加氨基酸能够促进非根际土壤全氮和有效磷向根际土壤转化,并使根际土壤氮含量维持在较高水平。综上所述,施用复合氨基酸增效剂,可明显促进水稻幼苗生长,复合氨基酸增效剂与普通尿素配合施用,可显著提高尿素氮肥利用率,并利于土壤全氮的积累。

    Abstract:

    In order to explore the synergistic effect of amino acid as fertilizer synergist in the growth ofrice,a pot experiment was conducted to investigate the influence of the application of compound amino acid solution combined with common urea onthe growth of rice seedlings and soil nutrients. The results showedthat,compared with nofertilization(CK1),rice seedlingheight,chlorophyllcontent(SPAD),root growthindex,shoot dry weight and NPK cumulative uptake were increasedsignificantly with the extension of transplanting time by the application of 5% compound amino acidsynergist(A). Amongwhich,the plant height increased by 11.1%~18.1%,the dry weight of aboveground increased by 9.03%~24.00%,and the cumulative absorption ofN,P,K increased by 32.3%~57.0%,50.7%~74.0%,and 19.0%~40.5%,respectively. Compared with singleurea(U)application,the plant height and root growth index of rice seedlings increasedsignificantly in the early transplantingstage,the SPAD increased significantly in the late transplantingstage,and the dry weight of aboveground and the cumulative uptake of NPK increased with the transplanting time by the combined applicationof 5% compound amino acid synergist with commonurea(AU). Under the same nitrogen conditions,the AU treatmentimproved the nitrogen use efficiency(8.24%~31.50%)compared with the U treatment(6.08%~28.10%). Inaddition,for AU treatment,the total nitrogen content in rhizosphere soil decreased from 0.93 g/kg to 0.91 g/kg with the increase oftransplantingtime,which was lower than that of U treatment. And the contents of total nitrogen and available phosphorus in rhizosphere soil were higher than that in non-rhizosphere soil. These indicate that the addition of compound amino acid can promote the conversion of total nitrogen and available phosphorus from non-rhizosphere soil to the rhizospheresoil,andmaintain the nitrogen content in the rhizosphere soil at a high level. Insummary,the application of compound amino acid cansignificantly promote the growth of riceseedlings,and the combination of compound amino acid with common urea can alsoimprove the nitrogen absorption andutilization,and conducive to the accumulation of soil total nitrogen.

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葛明慧,章力干,齐永波,张国漪,蒋东,程林.复合氨基酸增效剂与尿素配施对水稻幼苗生长及土壤氮素的影响[J].中国土壤与肥料,2020,(6):122-129.

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  • 收稿日期:2019-09-29
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  • 录用日期:2019-11-24
  • 在线发布日期: 2021-01-21