CAJ | 학술논문

水稻植质钵育秧盘的湿强度是保证秧盘成型及机械化插秧要求的关键因素。为了确保秧盘的湿强度能够满足秧盘成型及机械化插秧的要求，该文以水稻植质钵育秧盘为研究对象，利用蒸汽干燥技术，以蒸汽干燥后的秧盘湿强度为试验指标，通过单因素试验，分析研究了自然环境预处理时间、干燥时间、干燥温度和后干燥时间对秧盘湿强度的影响，确定了影响秧盘湿强度的主要因素和取值范围。在单因素试验的基础上，利用二次正交旋转组合试验建立了秧盘蒸汽干燥数学模型，并利用双因素分析法分析了各因素与评价指标之间的关系，确定各因素在数学模型中的主次顺序。试验表明：植质钵育秧盘干燥的最佳工艺条件是秧盘预处理时间为10 h，干燥时间为21 h，干燥温度为130℃，在此条件下秧盘湿强度预测值为0.4 MPa，验证试验得到实际湿强度值为0.395 MPa，与理论预测值相比，相对误差为1.25%。该研究结果为水稻植质钵育秧盘工业化生产提供一定的理论指导。
수도식질발육앙반적습강도시보증앙반성형급궤계화삽앙요구적관건인소。위료학보앙반적습강도능구만족앙반성형급궤계화삽앙적요구，해문이수도식질발육앙반위연구대상，이용증기간조기술，이증기간조후적앙반습강도위시험지표，통과단인소시험，분석연구료자연배경예처리시간、간조시간、간조온도화후간조시간대앙반습강도적영향，학정료영향앙반습강도적주요인소화취치범위。재단인소시험적기출상，이용이차정교선전조합시험건립료앙반증기간조수학모형，병이용쌍인소분석법분석료각인소여평개지표지간적관계，학정각인소재수학모형중적주차순서。시험표명：식질발육앙반간조적최가공예조건시앙반예처리시간위10 h，간조시간위21 h，간조온도위130℃，재차조건하앙반습강도예측치위0.4 MPa，험증시험득도실제습강도치위0.395 MPa，여이론예측치상비，상대오차위1.25%。해연구결과위수도식질발육앙반공업화생산제공일정적이론지도。
The seedling-growing tray was produced by mixing such materials as straw powder, biological glue, and fertilizer soil with nutrient media, and shaping it by pressing and drying. The drying process is one of the important parts of the production. Which drying method and process to be used is a key factor to ensure the drying quality of the seedling tray. The seedling tray drying quality includes such aspects as warpage, crack, wet strength, and corrosion. The warpage and cracks not only affect the tray modeling rate and agronomic requirements of mechanized cultivation, but also increase the cost of the production. The corrosion of the seedling tray determines the seedling quality and its shelf life. The wet strength determines the shape of the seedling tray as it is steeped in water and the mechanized planting agronomic requirements. The seedling tray drying methods include natural environmental ventilation drying, hot air drying, and steam drying. On an experimental basis, the three kinds of drying methods effects on the quality of seedling tray drying and the advantages of steam drying were considered in this paper. Then the steam drying method was determined to be the major way of drying the seedling tray. The wet strength is also an important indicator of steam drying quality, which is one of the key factors meeting the demands of seedling-growing tray molding and mechanized cultivating to ensure that the wet strength of a seedling-growing tray could fulfill the demands above. In this paper, a seedling-growing tray made of paddy-straw was taken as the research object, and the steam drying technology was used, with the wet strength after steam drying taken as experimental indicators. Through single-factor tests, we analyzed some elements which could affect the wet strength of a seedling-growing tray, such as natural environment pretreatment time, drying time, drying temperature, and drying time in a dryer after stopping steam supplying of a tray, and ascertained the influencing factors and the range of these factors. Based on single-factor tests, we utilized a quadratic orthogonal rotation combination test to establish a seedling-growing tray steam drying mathematics modeling, and analyzed the relationship between each factor and evaluation indicators based on a two-factor analysis method, and prioritized factors in mathematics modeling. Experiments showed the optimum process conditions of a seedling-growing tray made of paddy-straw drying we obtained:seedling tray pretreatment time was 10h, drying time was 21h, drying temperature was at 130℃. In this condition, the predicted wet strength of a seedling-growing tray was 0.4MPa. And the actual wet strength was 0.395MPa in validation tests. By comparing the theoretical predictions and the actual results, the relative error was 1.25%.The research result could provide certain theory directions for the industrial production of a seedling-growing tray made of paddy-straw.