水氮耦合条件下烤烟棵间蒸发及其影响因子研究  

Study on Soil Evaporation in Flue-cured Tobacco Field and Its Impact Factors under Water and Nitrogen Coupling Condition

作　　者：邵孝侯[1,2] 李沛喆 刘钰[1,2] 陈丹艳[1,2] 袁有波[3] 丁福章[3] 

机构地区：[1]河海大学南方地区高效灌排与农业水土环境教育部重点实验室,江苏南京210098 [2]河海大学水利水电学院,江苏南京210098 [3]贵州省烟草科学研究所,贵州贵阳550003

出　　处：《江西农业学报》2015年第7期37-39,共3页Acta Agriculturae Jiangxi

基　　金：中央高校基本科研业务费专项资金资肋(2014B04814;2015B05814);中国烟草总公司贵州省公司科技专项(烤烟抗旱关键技术研究与示范)

摘　　要：通过盆栽实验,研究了不同生育期烤烟在水氮耦合条件下棵间蒸发量及其所占耗水量的比值的差异,探讨了棵间蒸发的主要影响因子。结果表明:日均棵间蒸发量与土壤温度存在极显著正相关关系(P<0.01),与表层土壤含水率呈E=0.058e0.048θ(R2=0.717)指数函数关系。棵间蒸发量与耗水量的比值与叶面积指数呈E/ET=0.201LAI-0.912(R2=0.658)幂函数关系。在6 g/株施氮处理下伸根期、旺长期及成熟期灌水量和灌水频率分别为4.5 kg和9次、18 kg和18次、13 kg和26次对减小烤烟棵间蒸发效果最好。A pot experiment under water and nitrogen coupling condition was conducted in tobacco field. The soil evaporation and its ratio to total water consumption at different growing stages of flue-cured tobacco were analyzed, and the main factors affecting the soil evaporation were investigated. The results showed that the average daily soil evaporation was very significantly （P〈0.01） positively correlated with soil temperature, and it had an exponential functional relationship with the moisture content in surface soil （E = 0.058e^0.048θ, R2 = 0.717）. The ratio of soil evaporation to total water consumption （E/ET） had a power functional relationship with the leaf area index （LAI） （ E/ET= 0.201LAI^-0.912, R2 = 0. 658）. Under the condition of applying 6 g/plant nitrogen, the best effect of decreasing soil evaporation in flue-cured tobacco field could be obtained when the irrigation amount and irrigation frequency at root spreading stage, vigorous growing stage and maturing stage were 4.5 kg and 9 times, 18 kg and 18 times, 13 kg and 26 times, respectively.

关 键 词：烤烟 水氮耦合 棵间蒸发 影响因子 

分 类 号：S572[农业科学—烟草工业]