D. Savi, S. P. Jasper, G. G. Zimmermann, L. L. Kmiecik, Lauro Strapasson Neto, L. Sobenko, R. S. Ferraz, G. S. D. Campos
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引用次数: 1
摘要
采用粉末石墨作为固体润滑剂,减少大豆种子在机械播种过程中的摩擦,目的是促进种子流入种子库,同时减少对种子的机械损伤。本研究的目的是评价石墨对大豆种子纵向沉降在不同分布速度下的机械和气动给料机的影响。实验在静态模拟试验台上进行,采用完全随机设计,考虑两个变量:石墨剂量(0、1、2、4和8 g kg-1种子)和输送速度(气动给料器为5、7、9和11 km h-1);3、5、7和9公里(h-1为机械给料机)。为了评估种子分布的均匀性,我们从每250个间距的5个重复中评估了双间距、缺陷间距和可接受间距、变异系数和精度指数等参数的频率。对于气动给料机,最佳的投种精度分别为4.6 g kg-1和6.7 km h-1的石墨剂量和分布速度。反过来,最小化不期望的间距,同时最大化精度的最佳值是4.9±0.6 g kg-1和4.9±0.3 km h-1。总体而言,无论进料机制如何,由于储层内部的流动性更高,石墨的使用提高了种子分布的效率;然而,高剂量会产生相反的效果。此外,速度过快对种子分布有负面影响。
Graphite action on the longitudinal distribution of soybean seeds in mechanical and pneumatic feeders
The use of powdered graphite as a solid lubricant to reduce friction among soybean seeds during mechanical sowing aims to facilitate the seed flow into the seed reservoir, while reducing mechanical damage to the seed. The objective of this study was to evaluate the influence of graphite on the longitudinal deposition of soybean seeds using mechanical and pneumatic feeders at different distribution velocities. The experiment was performed on a static simulation-test bench, with a completely randomized design with two varying factors: graphite dose (0, 1, 2, 4, and 8 g kg-1 seed) and distribution velocity (5, 7, 9, and 11 km h-1 for the pneumatic feeder; and 3, 5, 7, and 9 km h-1 for the mechanical feeder). To assess the homogeneity of seed distribution, the frequency of parameters such as double, flawed, and acceptable spacings, coefficient of variation, and precision index were evaluated from five repetitions of 250 spacing each. For the pneumatic feeder, the optimal values to maximize precision of seed deposition were 4.6 g kg-1 and 6.7 km h-1 of graphite dose and distribution velocity, respectively. In turn, the optimal values to minimize undesirable spacing while maximizing accuracy with the mechanical feeder were 4.9±0.6 g kg-1 and 4.9±0.3 km h-1. Overall, regardless of feeding mechanism, the use of graphite promoted greater efficiency in the distribution of seeds owing to the higher level of fluidity inside the reservoir; however, high doses can cause the opposite effect. In addition, an excessive increase in speed influenced seed distribution negatively.
期刊介绍:
The journal publishes original articles in all areas of Agronomy, including soil sciences, agricultural entomology, soil fertility and manuring, soil physics, physiology of cultivated plants, phytopathology, phyto-health, phytotechny, genesis, morphology and soil classification, management and conservation of soil, integrated management of plant pests, vegetal improvement, agricultural microbiology, agricultural parasitology, production and processing of seeds.