新疆农业科学 ›› 2022, Vol. 59 ›› Issue (11): 2601-2613.DOI: 10.6048/j.issn.1001-4330.2022.11.001

• 作物遗传育种・耕作栽培・种质资源 • 上一篇    下一篇

增氧水输入对壤土土壤氮的影响

王红燕1,2,3(), 付彦博2,4, 王治国2, 扁青永4, 冯耀祖3(), 饶晓娟5   

  1. 1.新疆农业大学资源与环境学院,乌鲁木齐 830052
    2.新疆农业科学院土壤肥料与农业节水研究所,乌鲁木齐 830091
    3.新疆农业科学院科技成果转化中心,乌鲁木齐 830091
    4.新疆农业科学院拜城农业试验站/国家土壤质量阿克苏观测实验站,新疆阿克苏 843000
    5.新疆农业职业技术学院,新疆昌吉 831100
  • 收稿日期:2021-01-11 出版日期:2022-11-20 发布日期:2022-12-28
  • 通信作者: 冯耀祖
  • 作者简介:王红燕(1997-),女,新疆乌鲁木齐人,硕士研究生,研究方向为水肥气一体化技术研究和土壤-植物互作,(E-mail)3421009605@qq.com
  • 基金资助:
    国家自然科学基金(41867018);新疆农业科学院青年科技骨干创新能力培养项目(xjnkq-2020016);2018年度新疆农业职业技术学院课题(XJNZYKJ201809)

Effect of Oxygenated Water Input on Soil Nitrogen in Loam

WANG Hongyan1,2,3(), FU Yanbo2,4, WANG Zhiguo2, BIAN Qingyong4, FENG Yaozu3(), RAO Xiaojuan5   

  1. 1. College of Resources and Enviroment,Xinjiang Agricultural University, Xinjiang Shayibake Urumqi 830052,China
    2. Institute of Soil Fertilizer and Agricultural Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi 830091,China
    3. Center for Transformation of Scientific and Technological Achievements of Xinjiang Academy of Agricultural Sciences, Urumqi, 830091,China
    4. Baicheng Agricultural Experimental Station of Xinjiang Academy of Agricultural Sciences / National Soil Quality Aksu Observation Experimental Station, Xinjiang Aksu 843000,China
    5. Xinjiang Agricultural Vocational and Technical College, Changji, Xinjiang 831100,China
  • Received:2021-01-11 Online:2022-11-20 Published:2022-12-28
  • Correspondence author: FENG Yaozu
  • Supported by:
    National Natural Science Foundation of China(41867018);Youth Science and Technology Backbone Innovation Ability Training Project of Xinjiang Academy of Agricultural Sciences(xjnkq-2020016);Funding Project of Xinjiang Vocational and Technical College of Agriculture in 2018(Project Approval XJNZYKJ201809)

摘要:

【目的】研究不同溶解氧含量的增氧水对壤土土壤矿化作用和硝化作用的影响,分析增氧水输入提高土壤的供氮能力的作用机制。【方法】以壤土为供试土壤,采用室内土壤培养方法,选取常规水(RCK)、自然空气供氧曝气增氧(RD1)、33%增氧供氧曝气增氧(RD2)和90%增氧供氧曝气增氧(RD3)4个不同浓度增氧水输入,测定不同培养时间下不同浓度增氧水输入下壤土土壤的 NH -N和 NO --N含量,计算土壤净氮矿化量、净氮矿化速率、硝化率和硝化速率以及拟合各处理条件下土壤 NH -N含量与培养时间t的回归公式以及模型特征值,分析不同处理的输入效果。【结果】与达到最大消耗速率所用时间的变化趋势相反,4个不同处理中初始消耗速率V0和最大消耗速率Vmax的趋势变化均为RCK<RD1<RD2<RD3,初始消耗速率V0的最大值(8.950 1 mg/(kg・d)),最大消耗速率Vmax的最大值(13.019 8 mg/(kg・d))和达到最大消耗速率所用时间TVmax的最小值(1.502 1 d)均是RD3处理;相同增氧浓度条件下,壤土土壤净氮矿化量和硝化率随时间的增加呈现上升趋势,而壤土土壤净氮矿化速率和净硝化速率随时间的增加呈现下降趋势;在同一培养时间时期下,壤土土壤净氮矿化量、净氮矿化速率、硝化率以及净硝化速率的变化趋势均呈RCK<RD1<RD2<RD3处理的关系。【结论】增加输入水氧浓度会加速壤土氮素转化,增强土壤的矿化作用和硝化作用,改善土壤微生物的活动及矿物质的转化,提高土壤的供氮能力。

关键词: 增氧输入; 硝化; 矿化; 壤土

Abstract:

【Objective】 The effects of oxygenated water with different dissolved oxygen contents on mineralization and nitrification of irrigated loam soil were studied to provide reference for exploring the response of oxygenated water input to soil fertility.【Methods】 With loam as the test soil, the contents of NH -N and NO --N in loam soil under different concentrations of oxygenated water input at different cultivation time were determined by using indoor soil culture test method, including conventional water (RCK), natural air oxygenated aeration (RD1), 33% oxygenated aeration (RD2) and 90% oxygenated aeration (RD3). The soil net nitrogen mineralization, net nitrogen mineralization rate, nitrification rate and nitrification rate were calculated, and the regression formula and model eigenvalue of soil NH -N content and incubation time t under different treatment conditions were fitted, and then the input effects of different treatments were analyzed. 【Results】 Contrary to the change trend of the time used to reach the maximum consumption rate, the trend changes of the initial consumption rate V0 and the maximum consumption rate Vmax in the four different treatments were all RCK<RD1<RD2<RD3. The maximum value of the initial consumption rate V0 (8.950 1 mg/(kg・d)), the maximum value of the maximum consumption rate Vmax (13.019 8 mg/(kg・d)) and the minimum value of the time used to reach the maximum consumption rate TVmax (1.502 1 d) were all RD3 treatments. Under the same oxygen concentration, soil net nitrogen mineralization and nitrification rate increased with time, while soil net nitrogen mineralization rate and nitrification rate decreased with time. At the same incubation period, the variation trends of soil net nitrogen mineralization, net nitrogen mineralization rate, nitrification rate and net nitrification rate were all in the relationship of RCK<RD1<RD2<RD3.【Conclusion】 Increasing the oxygen concentration of input water can enhance soil mineralization and nitrification by accelerating soil nitrogen transformation, thereby improving soil microbial activity and mineral transformation, so as to improve soil nitrogen supply capacity.

Key words: oxygen input; nitrification; mineralization; loam

中图分类号: 


ISSN 1001-4330 CN 65-1097/S
邮发代号:58-18
国外代号:BM3342
主管:新疆农业科学院
主办:新疆农业科学院 新疆农业大学 新疆农学会

出版单位:《新疆农业科学》编辑部
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E-mail:xjnykx-h@xaas.ac.cn


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