DEVELOPMENT OF SUGAR CANE PLANTER

甘蔗是南千岛县、鹿儿岛县和冲绳县的主要农作物之一，为发展甘蔗栽培机械化系统，研制了甘蔗双菌苗自动播种机，取得了以下成果：1.甘蔗双菌苗切割器的研制及性能：为了从碎屑植株上获得20 cm长的甘蔗苗，在高速切割机上安装了塞子。对于弯曲度在3以下的装置，可连续切割2~3个除渣装置。插苗20 cm，正负2 cm，每小时1500片(2.2h/10a)垂直切段，几乎所有苗木状况良好，无细小裂口。甘蔗出苗装置的研制及性能：采用长30 cm、直径20 cm的两个平行的聚亚安酯滚筒作为出苗装置。在外表面碾压速度为10.5~11.5 cm/S、滚轮间隙为16 mm、振动比为6c/S的条件下，出苗装置在出苗速度为0.4~0.6m/S时性能最好，有破损现象，出苗方向良好。3.出苗装置的研制及性能：在出苗装置的作用下，研制出了带槽式输送机的单株播种装置，并将秧苗落在苗床上。该机在振动频率为6~15c/S、振幅为12 mm时具有良好的整平性能，在任何作业速度下，出苗率均为104~106%。4.播种精度和排种量：最终播种率为98%，播种深度18.0 cm，播距3.0 cm，计算田间持水量22.5a/h，出苗姿势良好。结果表明，研制的甘蔗播种机具有较强的田间实际应用能力。预计将对拉出辊的耐用性进行进一步研究。

For the development of the mechanization system in sugar cane cultivation which is one of the main crop in Nansei-shotou islands, Kagoshima prefecture and Okinawa prefecture, automatic planter of sugar cane seedling with two germs was developed and researched and the following results were obtained.1.Development and performance of cutting device for sugar cane seedling with two germs : To obtain seedling in 20cm length from detrashing plant, a stopper was attached to high speed cutter. For the plant of bending ratio under 3, two to three detrashing plant could be cut continuously. The cut seedlings were 20cm<plus-minus>2cm and 1500 pieces per hour (2.2h/10a) were cut vertically in section and almost all seeding were in good condition without fine spl2.Development and performance of draw out device for sugar cane seedling : Two parallel polyurethane rollers with 30cm in length and 20cm in diameter were used for draw out device. At the rolling speed of 10.5 to 11.5cm/s on outer surface, roller clearance of 16mm and the vibration ratio of 6c/s, the draw out device showed best performance for the planting velocity of 0.4 to 0.6 m/s. Any damage was seen and the direction of the seedlings were good.3.Development and performance of planting device : Under the draw out device, planting device was developed which transport each seedling with channel attached conveyer and seedlings were dropped on the seeding bed. This device showed a good leveling performance at vibrating rate of 6 to 15 c/s and vibrating amplitude of 12mm and the draw out ratio of 104 to 106% seemed to be best at any operating velocity.4.Planting accuracy and capacity : The final planting ratio was 98% with planting depth 18.0cm, planting pitch 3.0cm and calculated field capacity 22.5a/h and seedling were ina good posture. With these results, the developed sugar cane planter seemed to have enough capability in actual usage on the field. Further resaech about the durability of the draw out roll is expected.