HE Rongyu,ZHANG Ziqiang.Effects of Biological Pretreatment Coupled with Wet Storage on Biogas Production of Corn Straw[J].HEILONGJIANG AGRICULTURAL SCIENCES,2023,(09):76-80.[doi:10.11942/j.issn1002-2767.2023.09.0076]
修剪时期和高度对桔梗延期开花的影响
- Title:
- Effects of Biological Pretreatment Coupled with Wet Storage on Biogas Production of Corn Straw
- 文章编号:
- 13
- Keywords:
- corn straw; wet storage; biological pretreatment; biogas produciton
- 文献标志码:
- A
- 摘要:
- 为了调控桔梗花期，以两年生紫花桔梗为试验材料，研究修剪时期和高度对桔梗延期开花的影响。结果表明，终花期对桔梗进行修剪后桔梗不再开花，其他时期修剪后桔梗的花期均有延后，盛花期修剪后使花期延后36 d；现蕾前期及现蕾期修剪后桔梗的总花期最长，均为41 d；同一修剪时期下修剪高度为1/4的桔梗先开花，修剪高度为1/2的桔梗终花期相对延后。现蕾前期修剪后桔梗花梗长度显著高于对照组，修剪后花朵总数均小于对照组，现蕾期、始花期和盛花期修剪后花冠直径和花瓣长度显著高于对照组，始花期和盛花期修剪后花冠宽度显著高于对照组，同一修剪时期下不同修剪高度间桔梗的花部性状基本无明显差异。修剪高度相比修剪时期更有利于花期延长和花朵变大。
- Abstract:
- Straw storage is an effective means to ensure the stable supply of raw materials for crop straw biogas plant， and pretreatment is a common method to improve the biogas production of straw. In order to promote the biogas utilization of straw， this paper took corn straw as the research object， and added biogas slurry， cow dung and microorganism agent respectively for biological pretreatment during the two wet storage processes of short-term soaking and long-term anaerobic， and compared and analyzed the changes in the composition and the biogas production performance of corn straw. The results showed that biological pretreatment coupled with wet storage could effectively improve biogas production performance of corn straw. In the short-term soaking pretreatment storage， the content of cellulose and hemicellulose gradually decreased， and the biogas production rate of total solids gradually increased with the storage time. The biogas production of the microorganism agent group was the best， and the biogas production rate of total solids was the highest after 20 days of storage， reaching 492.6 m3·t-1， which was 18.78% higher than that in the control group. In the long-term anaerobic pretreatment storage， the cellulose and hemicellulose of each test groups were degraded rapidly on the first 60 days and slowly later， and the biogas production rate of total solids of each test groups showed a trend of rising first and then decreasing. The biogas produciton of the microorganism agent group was the best， and the biogas production rate of total solids reached the highest value of 522.1 m3·t-1 on 60 days of storage， which increased by 60.89% compared with the control group. However， the biogas production rate of total solids of biogas slurry group and cow dung group was lower than that of control group from 50 and 180 days of storage， respectively. Therefore, during the operation of straw biogas projects, appropriate pre-treatment and storage methods can be selected based on the actual situation to improve the gas production rate of straw TS.
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备注/Memo
收稿日期：2023-03-18