摘要
为了准确估算间作农田土壤水分动态变化过程,制定合理的灌溉制度,该文采用微型蒸渗仪测定了玉米/大豆不同间作模式下不同位置处的土面蒸发量,分析了相对土面蒸发强度与表层土壤含水率的关系以及相对土面蒸发强度与叶面积指数的关系。结果表明:玉米/大豆间作模式下,不同位置处的土面蒸发量存在差异,2︰3间作的累积蒸发量大于1︰3间作;相对土面蒸发强度与表层土壤含水率呈指数递增关系,与叶面积指数呈指数递减关系。
To accurately estimate soil water dynamics of intercropping and make reasonable irrigation schedule, soil evaporation at different locations of different intercropping patterns for maize and soybean was measured to analyze the relationship between relative soil evaporation intensity and topsoil water content and the relationship between the relative soil evaporation intensity and leaf area index using Micro-Lysimeters. The results indicate that there are differences between soil evaporation at different locations, the cumulated evaporation of 2 ： 3 intercropping pattern is higher than that of 1 ： 3 intercropping pattern. In addition, the relative soil evaporation intensity is exponential increasing with topsoil water content, while it is exponential decline with leaf area index.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2008年第7期44-48,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金资助项目(50679082)
国家'863'高技术研究发展计划资助项目(2006AA100209)
中央级公益性科研院所基本科研业务费专项基金(JBKY0032007018CAAS
2007-14)
商丘农田生态系统国家野外观测研究站开放基金
关键词
玉米
大豆
间作
土面蒸发
maize
soybean
mtercroppmg
soil evaporation
