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中国农学通报

中国农学通报 ›› 2021, Vol. 37 ›› Issue (7): 75-80.doi: 10.11924/j.issn.1000-6850.casb2020-0242

所属专题： 生物技术； 水稻

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

稻田土壤微生物数量和酶活性对水碳调控的响应

林秀颜1(), 江赜伟1, 陈曦1, 张淑娜1, 戴惠东2, 杨士红1,3()   

  1. 1河海大学农业科学与工程学院,南京 211100
    2昆山市城市水系调度与信息管理处,江苏昆山 215300
    3河海大学水文水资源与水利工程科学国家重点实验室,南京 210098
  • 收稿日期:2020-07-05 修回日期:2020-09-07 出版日期:2021-03-05 发布日期:2021-03-17
  • 通讯作者: 杨士红
  • 作者简介:林秀颜,女,1996年出生,河南濮阳人,硕士研究生,主要从事节水灌溉与农田生态效应研究。通信地址：211100 江苏南京佛城西路8号,E-mail： 191310060005@hhu.edu.cn。
  • 基金资助:
    国家自然科学基金“生物炭对节水灌溉稻田氮素迁移转化及损失的影响机理与调控研究”(51879076);江苏水利科技项目“节水灌溉稻田灌溉施肥一体化技术模式研究——以液态有机肥为例”(2018065)

The Response of Soil Microbial Quantity and Enzyme Activity to Water and Carbon Control Regulation in Paddy Fields

Lin Xiuyan1(), Jiang Zewei1, Chen Xi1, Zhang Shuna1, Dai Huidong2, Yang Shihong1,3()   

  1. 1College of Agricultural Science and Engineering, Hohai University, Nanjing 211100
    2Urban Water Scheduling and Information Management Department of Kunshan City, Kunshan Jiangsu 215300
    3State Key Laboratory of Hydrology-water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098
  • Received:2020-07-05 Revised:2020-09-07 Online:2021-03-05 Published:2021-03-17
  • Contact: Yang Shihong

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摘要：

为探究水碳调控稻田土壤微生物数量和酶活性变化,基于田间与室内试验,研究不同水碳处理稻田土壤微生物数量、过氧化氢酶和蔗糖酶的活性随土层深度的变化规律。结果表明,土壤过氧化氢酶活性随土层深度的增加呈现先增后减的趋势,土壤微生物数量和蔗糖酶活性随土层的加深而逐渐减小。与常规肥管理相比,有机肥施用和秸秆还田对稻田土壤过氧化氢酶活性无显著影响,而对土壤微生物数量和蔗糖酶活性影响较大。与淹水灌溉相比,控制灌溉提高了土壤过氧化氢酶活性,不同施肥管理条件下,控制灌溉对稻田土壤微生物数量和蔗糖酶活性的影响不一致。控制灌溉和有机肥施用、秸秆还田联合调控总体提高了稻田土壤微生物数量、过氧化氢酶和蔗糖酶的活性,且控制灌溉与有机肥施用结合效果更加明显。控制灌溉和有机肥施用、秸秆还田联合调控稻田0~40 cm土层土壤菌落数均值分别增加了1.73×105~3.83×105和2.33×104~2.43×105,土壤过氧化氢酶活性分别增加了1.82%~4.14%和2.95%~5.66%,土壤蔗糖酶活性分别增加了30.47%~64.25%和-25.04%~20.98%。

关键词: 控制灌溉, 稻田, 土壤微生物数量, 土壤酶活性, 秸秆还田, 有机肥

Abstract:

To explore the changes of soil microbial quantity and enzyme activity in water and carbon control regulated paddy fields, the variation rules of soil microbial quantity, catalase activity and sucrase activity with soil depth under different water and carbon treatments were studied based on field and laboratory experiments. The results showed that with the increase of soil depth, soil catalase activity increased first and then decreased, and soil microbial quantity and soil sucrase activity decreased. Compared with conventional fertilization management, organic fertilizer and straw incorporation had no significant effect on soil catalase activity in paddy fields, while they had a greater impact on soil microbial quantity and soil sucrase activity. Compared with flooded irrigation, controlled irrigation improved soil catalase activity. Under different fertilization conditions, the effect of controlled irrigation on soil microbial quantity and soil sucrase activity in paddy fields was not consistent. In general, the combination of controlled irrigation with organic fertilizer application and straw incorporation could improve the amount of soil microbial quantity, catalase activity, and sucrase activity. Besides, the combined effect of controlled irrigation with organic fertilizer application was more prominent. When controlled irrigation was combined with organic fertilizer application and straw incorporation, the average values of soil colonies, soil catalase activity, and soil sucrase activity in the 0-40 cm soil layer increased by 1.73×105-3.83×105 and 2.33×104-2.43×105, 1.82%-4.14% and 2.95%-5.66%, 30.47%-64.25% and -25.04%-20.98%, respectively.

Key words: controlled irrigation, paddy field, soil microbial quantity, soil enzyme activity, straw incorporation, organic fertilizer

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