应用生态学报2013，Vol.24Issue(7)：1900-1906,7.
耕作方式对东北雨养区玉米光合与叶绿素荧光特性的影响
Effects of tillage patterns on photosynthetic and chlorophyll fluorescence characteristics of maize in rainfed area of Northeast China
摘要
Abstract
In 2010-2011,a field experiment was conducted in Northeast China to evaluate the effects of different tillage patterns on the temperature and moisture in topsoil layer and the leaf photosynthesis and chlorophyll fluorescence of maize.The effects of tillage patterns on the soil temperature and moisture mainly manifested at sowing-jointing stage.In treatments flat planting with ridging at early jointing stage (PL) and flat planting without ridging (PP),the soil moisture content at the depth of 0-40 cm was significantly higher than that in treatment ridge planting (LL),with the increment being 5.6％ and 5.2％,4.6％ and 7.3％,and 3.9％ and 4.8％ at emergency,seedling,and jointing stages,respectively.The minimum temperature at the soil depth 5 cm at seedling stage in PL and PP was 1.4 and 1.3 ℃ higher than that in LL,respectively.Due to the improvement of soil water and thermal conditions,the leaf photosynthetic rate (Pn) and transpiration rate (Tr) at jointing stage in PL and PP were significantly higher than those in LL,whereas the PS Ⅱ potential activity (Fv/Fo) and PS Ⅱ maximal photochemical efficiency (Fv/Fm) had no significant differences among the treatments,indicating that the stomatal factors such as stomata conductivity and stomata limitation were the main factors inducing the photosynthesis differences among the treatments.Furthermore,the Pn and Tr at grain filling stage in LL and PL were higher than those in PP,mainly due to the high water-logging risk in PP in strong rainfall season.Consequently,treatment PL could promote maize photosynthesis through improving soil water and thermal conditions,and further,increase maize grain yield.关键词
玉米/垄作/平作/光合特性/叶绿素荧光特性/黑土区Key words
maize/ridge tillage/shallow tillage/photosynthetic characteristics/chlorophyll fluorescence characteristics/black soil region分类
农业科技引用本文复制引用
宋振伟,郭金瑞,任军,闫孝贡,郑成岩,邓艾兴,张卫建..耕作方式对东北雨养区玉米光合与叶绿素荧光特性的影响[J].应用生态学报,2013,24(7):1900-1906,7.基金项目
国家重点基础研究发展计划项目(2009CB118601)、国家自然科学基金项目(31000693)和国家"十二五"科技支撑计划项目(2011BAD16814)资助. （2009CB118601）
