农业机械学报2017，Vol.48Issue(8)：229-238,10.DOI:10.6041/j.issn.1000-1298.2017.08.026
气象因子对负水头供液下番茄日耗液量的敏感性分析
Sensibility Analysis of Meteorological Factors on Daily Consumption of Nutrient Solution for Tomato Using Negative Pressure
摘要
Abstract
Negative pressure irrigation technique,which is one of the new irrigation technology for saving water,was applied to substrate culture in greenhouse.There were fewer researches on the relationship between the daily consumption of tomato and meteorological factors added to the leaching link in substrate culture.The daily consumption of plant was affected by the interaction with meteorological factors and by the sensitivity of the meteorological factors.It was beneficial to develop the system of supplying nutrient solution and the management methods with substrate culture using negative pressure in greenhouse based on mastering above relationships.Tomato was used as a material with substrate culture testing for the condition of negative pressure to supply nutrient solution.The daily consumption of nutrient solution and meteorological factors,e.g.,air relative humidity,air temperature and solar radiation intensity,were measured.Based on these factors,a multivariate regression model was established and the direct path coefficient,indirect path coefficient,determination coefficient and total contributions for estimating the reliability degree of the regression model were calculated by path analysis method.The results showed that the direct path coefficients of crop coefficient and daily average solar radiation intensity reached a very significant level (P ＜ 0.01).The determination coefficient of these two factors and the contributions to R2 among the factors were the maximum,thus the two factors were the important meteorological factors on daily consumption of nutrient solution for tomato.From the effect of meteorological factors reduction on daily consumption value by path analysis,it was indicated that the daily average solar radiation intensity was the strongest sensitive factors,followed by the crop coefficient and daily maximum solar radiation intensity.关键词
番茄/日耗液量/负水头灌溉技术/气象因子/通径分析/敏感性Key words
tomato/daily consumption of nutrient solution/negative pressure irrigation technique/meteorological factors/path analysis/sensitivity分类
农业科技引用本文复制引用
张芳,张建丰,薛绪掌,王利春,陈晓丽,李友丽..气象因子对负水头供液下番茄日耗液量的敏感性分析[J].农业机械学报,2017,48(8):229-238,10.基金项目
北京市自然科学基金项目(6142008) （6142008）
