Authors

Abstract

Based on the technical characteristics of double-row ridge planting, a double V-shaped opener with the furrow compaction function was designed. This opener with the sliding knife and profiling mechanism was capable of furrow opening, compacting and profiling, and thereby created excellent seedbeds with tight bottom and soft soils. Through sunlight greenhouse tests, the effects of the double V-shaped opener on seedbed characteristics and soybean emergency were studied under the compaction forces of T1 (0 N), T2 (500 N), T3 (600 N) and T4 (700 N). The furrow compaction planting significantly affected the seedbed characteristics and soybean emergence and can preserve soil moisture in seedbeds. Under the semiarid condition, the average emergence time under T2 was 0.79 day earlier than under T1, and the emergence rates under T2, T3 and T4 were significantly raised. The seedling height uniformity under T2 was 5.34% higher than under T1. The average emergence time ranked from early to later as T3<T4<T2. The deep seeding uniformity, the emergence uniformity, and the average seedling height were all improved as the furrow compaction force was enlarged within 500- 700 N. Furrow compaction can preserve soil moisture in seedbeds, and the seedbed soil physical properties and soybean seedling emergence were optimized under the furrow compaction force of 600-700 N.

Abstract in Chinese

本文根据垄上双行的种植技术特点，设计了具有种沟镇压功能的双V型筑沟器，该筑沟器具有滑刀和仿形机构，可实现开沟、压沟和仿形功能，进而构建底部紧实，覆盖土壤松软的优良种床。 通过日光温室试验，研究分别在T1（0N）、T2（500N）、T3（600N）、T4（700N）镇压力下，双V型筑沟器对种床特性和大豆出苗的影响。结果表明，种沟镇压播种对种床特性和大豆出苗的影响是显著的。在半干旱环境下，T2的平均出苗时间比T1提前0.79天，T2、T3、T4的出苗率显著提高，苗高一致性T2比T1提高了5.34%，平均出苗时间由短到长依次为：T3<T4<T2。在500-700N镇压力范围内，随着种沟镇压力的增大，播深一致性越好，出苗一致性越好，平均苗高随镇压力的增大而增大。试验表明，种沟镇压对种床土壤具有保墒作用，种沟镇压力为600-700N时，种床土壤物理特性及大豆出苗情况最佳。