Authors

Abstract

To improve the utilization rate of fertilizers by peanut seeds, this paper aims at the synchronous hole fertilization and directly-above seeding of peanuts and designs a pneumatic horizontal disc hole fertilization device. A theoretical analysis of the ditching process of the fertilization furrow opener was carried out, and the height of the hole fertilization device from the ground was determined to be 40 mm. Through the analysis of the hole fertilization and directly-above seeding operation process, the time difference between seed metering and fertilizer metering was determined. Combining with theoretical analysis, EDEM - FLUENT coupling simulation tests and field tests were carried out on the device. The field test results show that the error of the fertilization hole spacing is 2.3% - 4.5%, the error of the hole fertilization depth is 3.2% - 5.1%, the seed - fertilizer distance is 64.8 mm - 67.2 mm, and the fertilizer distribution length is 99.3 mm - 107.5 mm. The test results meet the requirements specified in the sowing and fertilization standards.

Abstract in Chinese

为了提高花生种子对肥料的利用率，本文以花生穴施肥同步正位播种为研究目标，设计了这一种气吹式水平圆盘穴施肥装置。对施肥开沟器开沟过程进行了理论分析，确定了穴施肥装置距离地面的高度为40mm。通过对穴施肥及正位播种作业过程的分析，确定了排种与排肥的时间差。结合理论分析对该装置进行了EDEM-FLUENT耦合仿真试验及田间试验，田间试验结果表明施肥穴距误差为2.3%-4.5%，穴施肥深度误差为3.2%-5.1%，种肥间距为64.8 mm-67.2 mm，肥料分布长度为99.3 mm-107.5 mm。试验结果满足播种施肥标准中规定的要求。