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Studies on the Improvement of Soil-Overturning Performance by Rotary Tillage

旋耕提高翻土性能的研究

基本信息

批准号：
02660248
负责人：
MORIIZUMI Shoji
金额：
$ 1.02万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

In this study, the authors adopted electrical conductivity method used the mixture soil of KCl for the estimation of displacement ratio of soils tilled by rotary tillage. The main results were as follows.1. From the comparison of electrical conductivity before tillage with one after tillage, the soil displacement in the backward and forward by rotary tillage was confirmed. It is assumed that the soil-overturning performance of up-cut rotary tillage is better than one of down-cut rotary tillage. Moreover the soil-overturning by down-cut rotary deteriorated with the increase of tilling pitch.2. The soil under 7 mm with index number of Yamanaka soil hardness meter showed tendency to decrease the soil-overturning, but the soils above its hardness did not show the difference of soil overturning.3. In the tilling pitch of 42.4 mm, the soil-overturning performance by a traditional blade was better than a wide blade with gentle curve. On the other hand, the obvious difference for soil-overturning between both blades was not almost observed on the condition of tilling pitch 63.1 mm.4. Comparing the experimental results of sand with one of clay loam, soil-overturning of sand seems to be excellent than clay loam. However, we can not definitely conclude this, as the experimental condition differs between the two soils.5. In order to simplify furthermore the above method used mixture soil of KCl, we conducted a fundamental experiment of new method spraying the solution of KCl. The variation of application rate was within 4.1 %. Measuring the electrical conductivity of soil which solution of KCl percolated, the variation of 5.5 % in the swath width was recognized. However, From the various results, we think that this method is hopeful as the method to discriminate soil-overturning.

采用KCl混合土电导率法测定旋耕土壤的置换率。主要研究结果如下：1.通过对旋耕前后土壤电导率的比较，确定了旋耕前后土壤的位移。认为上旋耕的翻土性能优于下旋耕。随着耕距的增大，下旋耕翻耕的强度也随之增大.山中土壤硬度计指标值在7 mm以下的土壤表现出减少翻覆的趋势，而硬度值在7 mm以上的土壤翻覆没有表现出差异.在耕距为42.4mm时，传统刀片的翻土性能优于宽刃缓弯刀片。另一方面，在耕距为63.1 mm的条件下，两种刀片的翻土性能几乎没有明显差异。将砂土和粘壤土的试验结果进行比较，发现砂土的抗倾覆性能优于粘壤土。然而，由于两种土壤的实验条件不同，我们不能肯定地得出这一结论.为了进一步简化KCl混合土的上述方法，我们进行了喷洒KCl溶液的新方法的基础性试验。施用量的变异在4.1%以内。用KCl溶液浸泡土壤，测定电导率，测得电导率在扫描带宽度上的变化为5.5%。但是，从各种结果来看，我们认为该方法有希望作为一种判别翻覆的方法。