土壤抗破碎强度测定法

• 作 者: 赵渭生
• 机 构: 浙江农业大学
• 出 处: 土壤
• 发表日期: 1984年04期
• 关键词: 破碎强度 土壤强度 粘质水稻土 裂断 土壤耕性 风干土 定量化 压碎 土垡 土块

实践和研究表明,粘质水稻土土块的疏松或僵硬是评定土壤耕性好坏的一项重要指标[1]。农民一般用铁耙敲土垡或用手指捏土块以定性区别土壤的耕性。我们在总结农民经验的基础上采用了无侧限压缩仪测定风干土块的抗破碎强度,企图定量化,获得较好的结果[2]。土壤强度是指土壤抵抗外力压碎、裂断或流动时的能力,在定量意义上就是土壤抗阻破坏时的最大应力,一般以公斤/厘米~2表示。如发生剪切时,它的数值

Practice and research show that loose or stiff clods of paddy paddy soil is an important index for assessing soil tillage quality [1]. Peasants generally use an iron rake to hit soil rips or pinch soil blocks with their fingers to qualitatively distinguish the tillage of the soil. We summarize the experience of farmers based on the unconfined compressometer used to measure the crushing strength of dry soil mass in an attempt to quantify and obtain better results [2]. Soil strength refers to the capacity of the soil to resist crushing, breaking or flowing of external force. In quantitative sense, it is the maximum stress in the soil resistance to damage, generally expressed in kg / cm ~ 2. As sheared, its value