秸秆还田下灌溉模式对水稻产量及水氮利用的影响
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(1.中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站,内蒙古 呼和浩特 010020;2.东北农业大学水利与土木工程学院,黑龙江 哈尔滨 150030;3.内蒙古润友工程勘察设计有限公司,内蒙古 呼和浩特 010010)

作者简介:

秦子元(1995-),工程师,博士,主要从事农业节水理论与技术研究,E-mail:598760724@qq.com。同时为通讯作者。

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基金项目:

基金项目:内蒙古自治区科技计划项目(2023YFDZ0075);国家自然科学基金面上项目(52079028、51779046)。


Effects of irrigation modes under straw returning to field on rice yield and water and nitrogen utilization
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(1.Yinshanbeilu Grassland Eco-hydrology National Observation and Research Station,China Institute of Water Resources and Hydropower Research,Hohhot Inner Mongolia 010020;2.School of Water Conservancy and Civil Engineering,Northeast Agricultural University,Harbin Heilongjiang 150030;3.Inner Mongolia Runyou Engineering Survey and Design Limited,Huhhot Inner Mongolia 010010)

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    摘要:

    为阐明秸秆还田下灌溉模式对黑土稻作产量形成、水氮利用及土壤氮素残留的影响。通过设置常规淹灌(FI)、常规淹灌+秸秆还田(FI+SR)、浅湿灌溉+秸秆还田(SI+SR)、控制灌溉+秸秆还田(CI+SR)共4个处理,研究秸秆还田下灌溉模式对水稻农艺性状、产量、水氮利用率及土壤NH4+-N和NO3--N残留的影响。结果表明,水稻叶面积在抽穗期达到峰值,抽穗期到成熟期CI+SR处理叶面积指数较FI处理平均提高6.97%。与FI处理相比,FI+SR和SI+SR处理对水稻干物质累积起抑制作用,CI+SR处理可促进水稻中后期干物质累积。不同处理水稻干物质累积速率平均快增期为33.49 d,CI+SR处理干物质累积速率快增期最短,为28.39 d,FI、FI+SR和SI+SR处理水稻干物质最大增长速率较CI+SR处理分别降低27.19%、35.37%和30.08%。与FI处理相比,FI+SR和SI+SR处理水稻产量分别降低9.92%和4.59%,CI+SR处理通过增加单位面积有效穗和穗粒数使产量提高6.55%,并显著提高水稻水氮利用率(P<0.05)。秸秆还田处理NH4+-N含量较FI处理平均增加33.44%,20~40、40~60 cm土层中,FI+SR、SI+SR、CI+FI处理NO3--N含量较FI处理平均分别降低6.37%、16.16%、18.43%。综上所述,秸秆还田下控制灌溉模式可作为节水、省肥、减排并兼顾产量的最优组合。

    Abstract:

    In order to elucidate the effects of irrigation modes under straw returning to field on rice yield formation,water and nitrogen utilization and soil nitrogen residue in black soil,a total of four treatments,namely conventional flooding irrigation(FI),conventional flooding irrigation + straw returning to field(FI+SR),shallow wet irrigation + straw returning to field(SI+SR)and controlled irrigation + straw returning to field(CI+SR),were set up to study the effects of irrigation modes under straw returning to field on rice agronomic traits,yield,water and nitrogen use efficiency,soil NH4+-N and NO3--N residues. The results showed that the leaf area of rice reached its peak at heading period,and leaf area index of the CI+SR treatment was 6.97% higher than that of the FI treatment from heading to maturity. Compared with FI treatment,FI+SR and SI+SR treatment inhibited rice dry matter accumulation,and the CI+SR treatment promoted dry matter accumulation in the middle and late stages of rice. The average rapid increase period of the dry matter accumulation rate of rice in the different treatments was 33.49 days,and the CI+SR treatment had the shortest period of rapid increase in dry matter accumulation rate at 28.39 days. The maximum increase rate of rice dry matter was 27.19%,35.37% and 30.08% lower in the FI,FI+SR and SI+SR treatments,respectively,than that in the CI+SR treatment. Compared to the FI treatment,FI+SR and SI+SR treatments reduced rice yield by 9.92% and 4.59%,respectively. The CI+SR treatment increased rice yield by 6.55% by increasing effective spikes per unit area and number of grains in a spike,and significantly increased water and nitrogen use efficiency(P<0.05). The NH4+-N content of the straw return treatment was 33.44% higher than that of the FI treatment. In the 20-40 and 40-60 cm soil layers,the NO3--N content in the FI+SR,SI+SR and CI+SR treatments was decreased on average by 6.37%,16.16% and 18.43%,respectively,compared to the FI treatment. In summary,controlled irrigation with straw returning to field can be used as an optimal combination of water saving,fertilizer saving,emission reduction and yield.

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秦子元,张忠学,郑和祥,赵文博,刘祥.秸秆还田下灌溉模式对水稻产量及水氮利用的影响[J].中国土壤与肥料,2024,(9):191-199.

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  • 收稿日期:2023-11-13
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  • 录用日期:2024-01-05
  • 在线发布日期: 2024-11-22
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