Yilmaz Deniz, Jasinskas Algirdas
Department of Agricultural Machinery and Technologies Engineering, Faculty of Agriculture, University of Süleyman Demirel Isparta, Turkey.
AleksandrasStulginskis University, Institute of Agricultural Engineering and Safety Student^ 15A, Akademija, Kaunas distr., Lithuania.
Afr J Tradit Complement Altern Med. 2016 Jul 3;13(4):191-198. doi: 10.21010/ajtcam.v13i4.25. eCollection 2016.
The time required to harvest plant crops is important to the plant properties. It is affected by design of the harvest equipment and the desire for high-quality products with low energy usage.
Strength characteristics of L., an important medicinal aromatic plant, harvested on 2, 9, 16 and 23 July, 2012-2014 (H1, H2, H3 and H4, respectively) were measured at the bottom and top sections of the stalk. Measurements included maximum force, bio-yield force, shearing force, bending stress, shearing stress, shearing energy, and shearing deformation.
The highest maximum force (35.17 N) was at H4 on the bottom section, and the lowest was at H1 on the top. Maximum values for bio-yield force, shearing force, and bending stress were at H4 on the bottom section, and corresponding minimum values were at H1 on the top section. Shearing stress decreased at successive harvest dates for both stalk sections. The minimum shearing energy was at H4, (0.13 J and 0.06 J for bottom and top, respectively). Strength measurements for bottom sections of the stalk were greater than those for top sections.
When reduced harvesting force is needed because of harvester design or harvest procedures, harvesting near the top of the stalk is recommended.
收获农作物所需的时间对植物特性很重要。它受收获设备的设计以及对低能耗高质量产品的需求影响。
于2012年至2014年7月2日、9日、16日和23日（分别为H1、H2、H3和H4）收获的一种重要药用芳香植物L.的茎杆底部和顶部的强度特性进行了测量。测量内容包括最大力、生物屈服力、剪切力、弯曲应力、剪切应力、剪切能和剪切变形。
底部最高最大力（35.17N）出现在H4，顶部最低值出现在H1。生物屈服力、剪切力和弯曲应力的最大值出现在底部的H4，相应最小值出现在顶部的H1。两个茎杆部位在连续收获日期的剪切应力均下降。最小剪切能出现在H4（底部和顶部分别为0.13J和0.06J）。茎杆底部的强度测量值大于顶部。
由于收割机设计或收获程序需要降低收获力时，建议在茎杆顶部附近进行收获。
