摘要
为分析牧草同向异形堆存方式的优势与合理性,进行了苜蓿同向异形制备与堆存理论分析及试验。通过苜蓿同向异形制备试验,分析了抄板高度、抄板数量以及旋转筒转速3个因素对苜蓿同向异形单元单位长度质量和产量的影响。通过分析牧草同向异性堆存的传热传质过程,建立了牧草同向异形堆存的传热传质模型;通过与散草堆存热质传递模型的对比,证明了同向异形堆存的热质传递较快,牧草的同向异形堆存有着能够改善牧草自然通风干燥品质的实际意义。通过苜蓿同向异形堆存试验,测定了堆存过程的温度变化以及腐败变质比例。结果显示:经过同向异形调制整理后的苜蓿,在堆存过程中,牧草的植物活性提高,短期内部的发热较为严重,在经过一段时间之后,苜蓿同向异形堆存的温度下降;苜蓿同向异形堆存比散草堆存的腐败变质减少23.7%~76%。
With the aim to analyze and verify the advantages and rationality of eocurrent special-shaped alfalfa, the preparation and storage experiments were designed and the relative theories were analyzed. Through the preparation experiment of concurrent special-shaped alfalfa, the effects of three factors, such as the height of the flight, the number of flight and the rotation speed of the drum, on the density and yield of the cocurrent special-shaped alfalfa were analyzed. Through the analysis of heat and mass transfer process of eoeurrent special-shaped alfalfa storage, a heat and mass transfer model of coeurrent special- shaped alfalfa storage was established. In contrast with the heat and mass storage transfer model of grass normal storage, it can be proved that the heat and mass transfer of cocurrent special-shaped storage was faster, the cocurrent special-shaped alfalfa storage had practically and significantly improved the quality of the grass during natural ventilation. Through the storage experiment of alfalfa, the temperature changes, moisture changes and the ratio of decay were analyzed. Results showed that the alfalfa＇s plant activity was improved after the eocurrent special-shaped preparation to storage. Although in the short- term, the temperature within the alfalfa heat was increased seriously. After a period of time, the temperature of cocurrent special-shaped alfalfa storage was decreased. The alfalfa decay weight of the cocurrent special-shaped storage was reduced by 23.7% - 76% compared with the scattered storage.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第3期99-105,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
公益性行业(农业)科研专项(201203007)
关键词
苜蓿
同向异形
制备
堆存
腐败变质
alfalfa
cocurrent special-shape
preparation
storage
decay
