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    Development and field experiment of potato seedling killing and harvesting integrated machine
    ZHOU Yan-jun, LIN Chuan-yao, WU Jian, LIU Xiao-tan
    HUBEI AGRICULTURAL SCIENCES    2025, 64 (3): 156-161.   DOI: 10.14088/j.cnki.issn0439-8114.2025.03.025
    Abstract27)      PDF (3661KB)(7)       Save
    In response to the problem that the existing potato (Solanum tuberosum L.) harvesting machine didn’t have seedling killing function, a potato seedling killing and harvesting integrated machine was developed by integrating mechanized seedling killing and harvesting. The machine consisted of devices for seedling killing, excavation, separation and transportation, transmission, lifting, and collection. The structural parameters of key components were determined through theoretical analysis, and field experiments were conducted using the machine. The results showed that the potato harvesting loss rate was 3.9%, the potato damage rate was 1.9%, and the qualified rate of broken stem and leaf length was 90%. All performance indicators met the agricultural standards for potato mechanized seedling killing and harvesting, and could solve problems such as high harvesting costs, high labor intensity, and tedious mechanized operations.
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    Improvement and testing for the washboard of Enshi Yulu tea fine rolling machine
    ZHOU Yang, ZHANG Qiang, GAO Shi-wei, CUI Qing-mei, LIANG Jin-bo, HUANG Zhong-hao
    HUBEI AGRICULTURAL SCIENCES    2025, 64 (3): 162-166.   DOI: 10.14088/j.cnki.issn0439-8114.2025.03.026
    Abstract25)      PDF (6842KB)(0)       Save
    In response to the common problems of high breakage rate and flattened appearance in the mechanized shaping of Enshi Yulu tea, this study focused on the commonly used shaping equipment 60K-S fine rolling machine for Enshi Yulu tea mechanized production. Three different types of washboards were designed, optimized, and tested in production. The results showed that the third washboard had the best shaping effect, with a tooth height of 7 mm, a rounded tooth corner of 2.0 mm, and a rounded tooth groove corner of 3 mm. The triangular teeth in the middle of the washboard were changed to round straight strips.The changes in the structure of the washboard had a significant impact on shape and fragmentation, but had a relatively small impact on clarity and color. Reducing the height of the washboard teeth, increasing the rounded corners of the rubbing teeth, and adding rounded tooth grooves had a significant impact on the crushing of tea leaves, resulting in more uniform tea leaves and less breakage.
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