热带气象学报2016，Vol.32Issue(5)：759-766,8.DOI:10.16032/j.issn.1004-4965.2016.05.019
海南番茄春季干旱灾害等级指标
CONSTRUCTION OF A SPRING DROUGHT DISASTER INDEX FOR TOMATO GROWTH
摘要
Abstract
As one of the major disasters threatening the growth of tomato,drought should be timely monitored based on appropriate indexes.Taking continuous dry days and complementary precipitation as factors and using a uniform design scheme,a field experiment on drought for tomato was conducted based on the two factors with nine levels separately.Through correlation and regression analysis and taking drought grade criterion based on relative soil moisture for reference,a drought disaster index for tomato was constructed and the effects of drought on physiological parameters and tomato yield were carried out under the drought stress above.The results indica-ted that the rate of dead tomato seedlings increased with drought,and had a correlation of up to -0.84,with the dryness divided with reference to relative soil moisture at the depth of 20 cm.Continuous dry days notably affected the rate of dead tomato seedlings and were chosen as the key drought index.Continuous dry days of <26 d,26 ~31 d,31 ~35 d,≥35 d were corresponding to no-drought,light drought,median drought and heav-y drought separately.Under different level of drought stress,net photosynthetic rate,transpiration rate and stomatal conductance for tomato had a tendency of decreasing-increasing-decreasing-decreasing,while intercel-lular carbon dioxide concentration had a tendency of decreasing-increasing-increasing-increasing.The yield of tomato decreased as continuous dry days increased.The drought disaster index for tomato was simple and matched well with the actual drought disaster situation and can help provide strategies for monitoring and preven-tion of drought disaster for tomato.关键词
番茄/均匀设计/春季干旱/持续干旱日数Key words
tomato/uniform design/spring drought/continuous dry days分类
农业科技引用本文复制引用
张蕾,霍治国,陈汇林,吴翠玲..海南番茄春季干旱灾害等级指标[J].热带气象学报,2016,32(5):759-766,8.基金项目
公益性行业（气象）科研专项（GYHY201206019）；国家科技基础性工作专项（2007FY120100）共同资助 （）
