摘要
针对温室作物秋冬季节CO2气肥严重不足的问题,设计了适用于普通温室大棚的基于生物质原料发酵的二氧化碳施肥器。采用作物秸秆在好氧发酵作用下进行发酵,制取二氧化碳。同时,采用合理的自动控制策略,获取生物质发酵过程中适宜的温度及水分等条件,并试验研究了生物质发酵制取CO2的最佳条件,验证了该施肥器用于温室补施二氧化碳的可行性。试验结果表明:利用秸秆等农作物废弃物(秸秆+好氧发酵菌)生物发酵产生CO2的最佳条件为:温度45℃、含水量为70%、初始碳氮比为40:1,产气速率最快;碳氮比对CO2的释放影响最大,温度影响次之,含水量影响最小;在此条件下一次上料可以连续12天让面积120m2的温室CO2浓度保持在1 200×10-6以上,满足温室使用需求。
For serious shortage of CO2 fertilizer in greenhouses in autumn and winter,a CO2 fertilizer generator was designed. CO2 was produced by crop straws aerobic fermentation. Meanwhile the suitable temperature and moisture for biomass fermentation were maintained by using reasonable automatic control strategy. The optimum conditions for CO2 produced were studied,and the feasibility of the application in greenhouses was verified. The results showed that,the optimum conditions for the CO2 production by aerobic fermentation of crop straws and other agricultural wastes( crop straws+ aerobic fermentation bacteria) were as follows: temperature of 45℃,70% of water content,40: 1 of initial carbon nitrogen ratio. The carbon nitrogen ratio was the most important factor,following by temperature,and crop straws water content. For a 200m2 greenhouse,CO2concentration could be maintained at 1200 ppm during 12 days,which was meet the demand of greenhouse.
出处
《农机化研究》
北大核心
2016年第10期254-257,共4页
Journal of Agricultural Mechanization Research
基金
北京市农林科学院科技创新能力建设专项(KJCX20140415)
宁夏回族自治区科技攻关计划项目(NXKJ201401A06)
关键词
生物质
CO2
施肥器
温度
含水量
碳氮比
biomass
CO2
fertilization
temperature
water content
carbon and nitrogen ratio
