激光生物学报2016，Vol.25Issue(3)：283-289,269,8.DOI:10.3969/j.issn.1007-7146.2016.03.016
行距配置对晚熟冬麦区群体结构与光合性能的影响
Effects of Row Spacing on Population Structure and Photosynthesis of Winter Wheat in Jinzhong,China
摘要
Abstract
Reasonable row spacing can adjust crop canopy structure photosynthesis.Winter wheat (Triticum aestivum L.)yield of Taigu in Shanxi,northern China can not increase for a long period time because of late timing of seeding af-ter the harvest of soybean,and large amount of water,fertilizer and seeds.To investigate the effects of row spacing on photosynthesis and population structure of winter wheat in Taigu,two wheat varieties,Shannong 9-1 (A1)and Shannong 9801(A2),with different spike shapes,were chosen in this field trial.With the same seeding rate,two row spacing, B1 (20 cm row spacing))and B2 (10 cm row spacing)),measurements including population structure,photosynthetic characteristic and yield structure were investigated for 2 years in Taigu.The results showed that,in the whole growing period,the LAI of B2 was higher than that of B1,B2 row spacing altered the vertical distribution of leaves especially for multi-spike wheat variety (60-80 cm).The RLI% of B2 was higher than that of B1 at middle and upper plant layers (45-90 cm)and the maximal gap reached to 30% at the height of 60-75 cm.The PN of flag leaf (after flowering)and the PNPR (from booting stage to dough stage)with 10 cm row spacing were higher than that of 20 cm row spacing.The total dry substance weight,the dry substance weight of green leaves,stems and spikes of the four treatments were all demonstrated as B2 >B1.The yield and biological yield of B2 in two wheat cultivars were both significantly higher than those of B1,but the economic coefficient of B2 are less than that B1 of the corresponding varieties of wheat.It indicated that row spacing has little effect on different wheat varieties,while it has more effect on grain number per spike than oth-er yield components.It is more suitable for late maturing winter wheat region using 10 cm row spacing.关键词
行距配置/晚熟冬麦区/群体结构/光合性能Key words
row spacing/late maturing winter wheat zone/population structure/photosynthetic characteristic分类
农业科技引用本文复制引用
王爱萍#,董琦#,冯变娥,张瑞,范晋波,高志强..行距配置对晚熟冬麦区群体结构与光合性能的影响[J].激光生物学报,2016,25(3):283-289,269,8.基金项目
现代农业产业技术体系建设专项（CARS-03-01-24）；山西省科技攻关计划项目 （）
