温室番茄需水特性及影响因素分析

Analysis of Water Requirement Characteristics and Influencing Factors of Greenhouse

为更加准确的确定温室番茄滴灌灌溉制度和灌溉用水量,本研究采用小区试验方法,分析了滴灌条件下温室番茄的需水规律及影响因素。研究结果表明,温室番茄的需水规律表现为前期小,中期大,后期减小的变化规律,需水高峰期出现在开花坐果期和成熟采摘前期。番茄需水量与太阳辐射、气温、饱和差呈线性正相关关系,与相对湿度呈线性负相关关系,与叶面积指数呈线性正相关关系。温室番茄需水量受气象因素和自身生长发育状况的综合影响。

In order to establish drip irrigation regime and irrigation amount for greenhouse tomato in the regions of northern Henan,water requirement and influencing factors of drip irrigated tomato were analyzed by using plot experiment in this paper.The results showed that water requirement law of tomato was small in the early growing stage,large in the middle growing stage,and reducing in the late growing stage in greenhouse;the biggest water requirement stage was at the flowering and fruit development stage and at the early fruit maturation stage.A positive liner correlation existed between water requirement and meteorological factors,such as solar radiation,air temperature and vapor pressure difference,and negatively liner correlation existed between water requirement and relative humidity.Water requirement was positive liner correlated with leaf area index.Therefore,water requirement of tomato was affected by meteorological factors and growth and development status of tomato.