Design and Experiment of a Single-Row Small Grain Precision Seeder

Aiming at the problems of low land utilization and serious water waste in the existing wheat planting pattern, a two-high and two-low wheat high-low border spaced apart planting mode was proposed, and a high and low borders wheat no-till planter that can finish stubbing, fertilization, border construction, seeding and other tasks was designed. The design and analysis of the ship-type ridging device were carried out, and the construction process was simulated to determine the optimal parameters. A field test was carried out, the average sowing depth was 3.17 cm, the qualification rate was 95%, the standard deviation was 0.38 cm, and the coefficient of variation was 12.06%. The average value of the width of the seedling belt was 9.40 cm, the qualification rate was 91.67%, the standard deviation was 0.29 cm, and the coefficient of variation was 3.09%. The average height difference between the high and low borders was 9.26 cm, the pass rate was 100%, the standard deviation was 0.35 cm, and the coefficient of variation was 3.83%. The average width of the borders was 52.18 cm, the qualified rate of the border width was 100%, the standard deviation was 1.00 cm, and the coefficient of variation was 1.93%. The differences between each index and the theoretical design are small and meet the agronomic requirements.

Design and Experiment of No-Tillage Planter for High and Low Borders Wheat

YANG,

MA,

ZHANG

et al. 2023

Establishment and Application of Soil Fertilization Prescription Chart

KONG,

SUN,

et al. 2024

Precision soil fertilization is an important aspect of smart precision agriculture development, and the fertilization prescription map is a prerequisite for precision fertilization. Taking grapevine soil information as an example, this study explores the impact of different sampling densities on the accuracy of soil nutrient distribution. Experimental trials were conducted using sampling densities of 1m x 1m, 3m x 3m, 6m x 6m, 9m x 9m, and 12m x 12m, with the optimal sampling density determined to be 6m x 6m. Nutrient distribution maps were created using Bigemap and ArcGIS software, and based on nutrient balance calculations using ArcGIS software, fertilization prescription maps were developed. Furthermore, precise fertilization schemes for nitrogen, phosphorus, and potassium fertilizers were formulated based on the prescription maps. This study provides methodological and data support for research on precision soil fertilization.

Simulation and Test of Filling Performance of Pneumatic Precision Seed Metering Device Based on Edem Software

GUO,

ZHANG,

WANG

et al. 2024

In order to study the effect of population disturbance on the filling performance of the seed metering device, this paper uses the pneumatic precision seed metering device as the model, and uses EDEM software to simulate the population movement of three different seed metering devices. The bench test was carried out at different pressures at 12 km/h and at different speeds at 3.5 kPa. The results show that the designed seed disk with grooves has the most intense disturbance and the highest qualified rate. In order to verify the performance of the disk, full factor tests are carried out on the air pressure and speed, The test results show that when the operating speed is 10~12 km/h and the positive pressure is 3~3.5 kPa, the leakage rate is no higher than 5.42%, the replay rate is no higher than 0.42%, and the qualified rate is no lower than 94.58%. When the operating speed is 14 ~ 16 km/h and the positive pressure is 3.5~4 kPa, the leakage rate is not higher than 6.7%, the replay rate is not higher than 1.04%, and the pass rate is not lower than 93.12%. All the indicators are better than the national standard.