付强,马梓奡,李天霄,侯仁杰.覆盖物对冻融土壤热量空间分布与传递效率的影响[J].农业机械学报,2018,49(2):292-298.
FU Qiang,MA Ziao,LI Tianxiao,HOU Renjie.Influence of Different Covers on Heat Spatial Distribution and Transfer Efficiency of Freezing-thawing Soil[J].Transactions of the Chinese Society for Agricultural Machinery,2018,49(2):292-298.
摘要点击次数: 2047
全文下载次数: 992
覆盖物对冻融土壤热量空间分布与传递效率的影响   [下载全文]
Influence of Different Covers on Heat Spatial Distribution and Transfer Efficiency of Freezing-thawing Soil   [Download Pdf][in English]
投稿时间:2017-09-05  
DOI:10.6041/j.issn.1000-1298.2018.02.037
中文关键词:  覆盖物  冻融土壤  热量  空间分布  传递效率
基金项目:国家自然科学基金项目(51679039)和黑龙江省杰出青年基金项目(JC201402)
作者单位
付强 东北农业大学 
马梓奡 东北农业大学 
李天霄 东北农业大学 
侯仁杰 东北农业大学 
中文摘要:为了明确覆盖物对冻融土壤热量传递阻碍作用的机理和特性,基于冬季大田试验(2016年11月1日—2017年4月30日),设置裸地、自然降雪覆盖、5cm秸秆覆盖+自然降雪、10cm秸秆覆盖+自然降雪4种处理,分别测定了不同处理条件下10、20、30、40、50、60、70、80、90、100cm深度的土壤总含水率、液态含水率和温度等数据,计算了不同处理条件下冻融土壤的热容量、相变热量和热量变化量等相关参数,进而分析了覆盖物对冻融土壤热量空间分布和传递效率的影响。结果表明:试验期30cm深度范围内土壤热量交换量占比较大,不同时期内热量变化占比可达54.57%~81.17%;在冻结期4种处理条件下,土壤热量传递整体呈现出热量散失的趋势,在融化期4种处理条件下,土壤热量传递整体呈现出热量吸收的趋势;自然降雪覆盖、5cm秸秆覆盖和10cm秸秆覆盖对于热量传递的影响率分别为17%、8%和17%;4种处理条件下土壤热量无变化时间段均较长,分别为29.17%、39.41%、43.33%、50.88%。
FU Qiang  MA Ziao  LI Tianxiao  HOU Renjie
Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University and Northeast Agricultural University
Key Words:mulching  freezing-thawing soil  heat  spatial distribution  transfer efficiency
Abstract:Soil mulch is one of the important agricultural measures, in order to inquiry the mechanism and characteristics of the mulching hindrance effect on heat exchange between atmosphere and soil. There were four treatments of bare land, natural snowfall mulching, 5cm straw with natural snow fall mulching and 10cm straw with natural snow mulching in winter field trial period (2016.11.1—2017.4.30), the total soil water content, liquid water content and temperature at the soil depths of 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm and 100cm under the four treatments were determined, the heat capacity, phase change heat and heat quantity of freezing-thawing soil were calculated, and then the effects of different mulching treatments on heat spatial distribution and transfer efficiency in freezing-thawing soil were analyzed. The result showed that the depth of 30cm soil heat exchange was accounted for relatively large, the heat quantity was accounted for up to 54.57%~81.17% in different trial periods. In the freezing period, the soil heat transfers of four treatments showed the heat dissipation overall trend, and in the thawing period, the soil heat transfers of four treatments showed the heat absorption overall trend. The effects of the natural snowfall mulching, straw mulching of 5cm and 10cm on the heat transfer rate were 17%, 8% and 17%, respectively. The time periods of no soil heat change were long with proportions of 29.17%, 39.41%, 43.33% and 50.88%, respectively under different treatments. The study had practical significance for the spring soil moisture conservation.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

   下载PDF阅读器