增大偏转轮胎技术对土壤压实的影响

IF 1.2 4区 农林科学 Q3 AGRICULTURAL ENGINEERING
M. Tekeste, T. Way, Wayne Birkenholz, Sally Brodbeck
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引用次数: 3

摘要

中频和VF农用子午线轮胎能够在相同的充气压力下比标准子午线轮胎承载更大的载荷。对于MFWD拖拉机和中央填充播种机,拖拉机后轮胎是种植过程中土壤压实的主要来源。标准子午线轮胎充气压力下拖拉机后轮胎的峰值土应力大于IF子午线轮胎充气压力下的峰值土应力。标准子午线轮胎充气压力下的潜在土壤压实比IF子午线轮胎充气压力下的更大。摘要新的农用轮胎标准,被指定为增加挠度(IF)和极高挠度(VF),已被引入农业机械,提供更大的接触面积相比,标准子午线轮胎承载相同的轴载荷。关于新采用的IF轮胎和精密轮胎充气压力管理系统如何影响土壤压实、燃油经济性和作物产量的响应,已经进行了有限的研究。本研究旨在探讨大田和运输(道路)轮胎充气压力设置的行作物农业拖拉机和播种机轮胎对土壤压实的影响。在爱荷华州布恩的爱荷华州立大学农场进行了一项完全随机设计实验,对约翰迪尔8310R MFWD拖拉机上的双前胎(Firestone IF 420/85R34)和双后胎(Firestone IF 480/80R50)以及约翰迪尔DB60中央填充种植机上的运输轮胎(超级单胎445/50R22.5)的两个轮胎充气压力水平进行了研究。使用应力状态传感器(SSTs)测量土壤压实度,埋设在未交通的土壤表面下150 mm和300 mm深度。在拖拉机和播种机轮胎通过前后的轮胎中心线处测量了土壤锥指数深度剖面。在拖拉机和播种机轮胎通过后,还在轮胎中心线处测量车辙深度。根据海表温度数据计算了土体的峰值八面体正应力(soct)和相应的八面体剪应力(toct)值。标准子午线胎压处理后拖拉机轮胎的峰值sot明显大于IF子午线胎压处理。轮胎充气压力处理对前拖拉机轮胎和播种机运输轮胎的峰值温度没有显著影响。对于这种拖拉机和播种机配置,土壤应力结果表明拖拉机后轮胎是种植过程中土壤压实的主要来源。标准子午线胎压处理显著高于中频子午线胎压处理(P < 0.05)。如土壤应力所示,在标准子午线轮胎充气压力下,拖拉机和播种机运输轮胎产生的潜在土壤压实量预计大于IF子午线轮胎充气压力。关键词:增弯子午线轮胎,土压实,土锥指数,土应力状态,轮胎充气压力
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Increased Deflection Tire Technology on Soil Compaction
Highlights IF and VF agricultural radial tires are capable of carrying a greater load at the same inflation pressure than a standard radial tire. For this MFWD tractor and central-fill planter, the rear tractor tire is the main source of soil compaction during planting. The peak soil stress for the rear tractor tire was greater for standard radial tire inflation pressures than for IF radial tire inflation pressures. Potential soil compaction is expected to be greater for standard radial tire inflation pressures than for IF radial tire inflation pressures. Abstract. New agricultural tire standards, designated as Increased Flexion (IF) and Very High Flexion (VF), have been introduced for agricultural machines that offer larger contact areas compared to the standard radial tire carrying the same axle load. Limited studies have been conducted on how the newly adopted IF tires and precision tire inflation pressure management systems affect soil compaction, fuel economy, and crop yield responses. This study aimed to investigate the effects of field and transport (road) tire inflation pressure settings of row-crop agricultural tractor and planter tires on soil compaction. A completely randomized design experiment was conducted at the Iowa State University farm at Boone, Iowa, for two tire inflation pressure levels on the dual front (Firestone IF 420/85R34) and dual rear (Firestone IF 480/80R50) tires on a John Deere 8310R MFWD tractor, as well as transport tires (Super single 445/50R22.5) on a John Deere DB60 central-fill planter. Soil compaction was measured using Stress State Transducers (SSTs) buried at 150 mm and 300 mm depths beneath the untrafficked soil surface. The soil cone index depth profile was measured at the tire centerline before and after the tractor and planter tire passes. After the tractor and planter tire passes, rut depth was also measured at the tire centerline. Peak octahedral normal stress (soct) and the corresponding octahedral shear stress (toct) values in soil were calculated from the SST data. The peak soct for the rear tractor tire was significantly greater for the Standard Radial Tire Pressures treatment than for the IF Radial Tire Pressures treatment. The tire inflation pressure treatment did not significantly affect the peak soct for the front tractor tire and the planter transport tire. For this tractor and planter configuration, soil stress results identify the rear tractor tires as the main source of soil compaction during planting. The Standard Radial Tire Pressures treatment caused significantly higher soil cone index and soil rut depth compared with the IF Radial Tire Pressures (P < 0.05). As indicated by soil stresses, potential soil compaction from the tractor and planter transport tires is expected to be greater for standard radial tire inflation pressures than for IF radial tire inflation pressures. Keywords: Increased Flexion (IF) radial tire, Soil compaction, Soil cone index, Soil stress state, Tire inflation pressure.
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