玉米水分亏缺监测诊断的研究  

The Study of Diagnosing and Monitoring Maize Water Deficit

作　　者：徐祝龄 王汶[1] 衣纯真[1] 

机构地区：[1]北京农业大学资环学院,北京100094

出　　处：《北京农业大学学报》1995年第3期291-298,共8页

摘　　要：本文以玉米为研究对象,用能量的观点来研究在土壤、大气两者共同胁迫条件下,土壤、植物、大气之间的水分关系。并以水势为主要指标,用蒸腾能力来表示大气环境对作物的影响,在综合土壤水势、气象条件和作物因素对叶水势影响的基础上,采用数理统计方法,建立了叶水势监测土壤水分亏缺的数学模型,并对模型的应用作了一些讨论。同时指出叶水势作为作物水分胁迫指标,比蒸腾速率、气孔导度要好。进一步提出了一种对作物干旱行之有效的监测方法。According to the theory of system,this paper studdied maize water relations among soil, piants and atmosphere under the stress conditions of soil and atmosphere.Leaf water potential was taken as the main index,and transpiration potential was also used to represent the atmospheric effect on maize. On the basis of considering the effect on leaf water potential,which synthetically considers the soil water potential,the meteorological condition and the crop factor,the statistics method was used for establishing the mathematical models of monitoring the soil water deficit based on leaf water potential.Then,the mokels have been tested on the basis of field experiment.The result showed that.as the maize water stress indes,the leaf water potential was better than transpiration method about crop drought was put for- ward.

关 键 词：叶水势 土壤水势 气象条件 监测 玉米 

分 类 号：S513.01[农业科学—作物学] S161.41