浙江农业学报 ›› 2019, Vol. 31 ›› Issue (5): 798-805.DOI: 10.3969/j.issn.1004-1524.2019.05.16

• 环境科学 • 上一篇    下一篇

利用响应曲面法优化秸秆腐熟剂的腐解条件

苏瑶1, 贾生强1,2, 何振超1, 杨艳华1,2, 喻曼1, 陈喜靖1, 沈阿林1,*   

  1. 1.浙江省农业科学院 环境资源与土壤肥料研究所,浙江 杭州 310021;
    2.浙江农林大学 环境与资源学院,浙江 杭州311300
  • 收稿日期:2019-01-30 出版日期:2019-05-25 发布日期:2019-05-23
  • 通讯作者: *沈阿林,E-mail: shenalin_123@126.com
  • 作者简介:苏瑶(1989—),女,四川成都人,博士,助理研究员,主要研究方向为秸秆还田的产地环境效应。E-mail: stellasu@sina.com
  • 基金资助:
    国家重点研发计划(2018YFD0200500,2016YFD0200804);浙江省重点研发计划(2018C02036);浙江省自然科学基金(Q18D030001)

Optimization of straw decomposition with inoculants by using response surface method

SU Yao1, JIA Shengqiang1,2, HE Zhenchao1, YANG Yanhua1,2, YU Man1, CHEN Xijing1, SHEN Alin1,*   

  1. 1. Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
    2. College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, China;
  • Received:2019-01-30 Online:2019-05-25 Published:2019-05-23

摘要: 以水稻秸秆为代表,研究了4种腐熟剂对秸秆腐解性能的影响。基于施用腐熟剂后的秸秆腐解率和碳氮比,选择其中1种腐解性能较好的腐熟剂,采用Box-Behnken设计对其秸秆腐解条件进行优化,主要考查腐熟剂用量、温度、含水量和外加氮源(浓缩沼液)量等4个因素。结果表明,腐解温度、含水量和腐熟剂用量对腐解率的影响达到极显著水平(P<0.01),最佳腐解条件是温度29.6 ℃,含水量90%,腐熟剂和浓缩沼液氮添加量分别为秸秆质量的2.0%和0.17%。数学模型分析预测得知,在该条件下腐熟剂添加后25 d水稻秸秆腐解率可达63.25%,与验证试验结果基本相符。

关键词: 水稻秸秆, 腐熟剂, Box-Behnken设计

Abstract: The rice straw was selected as typical straw to illustrate the influence of 4 straw-decomposing inoculants on the decomposition of straws. Based on the decomposition rate and ratio of carbon to nitrogen of rice straw, one inoculant with better straw decomposing capacity was selected for optimization of straw decomposing conditions by Box-Behnken design. The result demonstrated that among the four factors, namely, straw-decomposing inoculant content, temperature, water content and extra-nitrogen (biogas slurry) content, the effect of temperature, water content and straw-decomposing inoculant content on decomposition rate reached the significant level of P<0.01. The predicted optimum conditions for straw decomposing were temperature of 29.6 ℃, water contents of 90%, straw-decomposing inoculant content of 2.0% of the straw weight, and extra-nitrogen content of 0.17% of straw weight. According to the mathematical model, the maximum decomposition rate on 25th day was 63.25%, and it was consistent with the decomposition rate revealed by verification experiment under the above conditions.

Key words: rice straw, straw-decomposing inoculants, Box-Behnken design

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