The effects of intraspecific competition and light transmission within the canopy on wheat yield in a wide-precision planting pattern  

作　　者：LIU Xin WANG Wen-xin LIN Xiang GU Shu-bo WANG Dong 

机构地区：[1]College of Agronomy,Shandong Agricultural University/State Key Laboratory of Crop Biology,Ministry of Science and Technology/Key Laboratory of Crop Ecophysiology and Farming System,Ministry of Agriculture,Tai'an 271018,P.R.China

出　　处：《Journal of Integrative Agriculture》2020年第6期1577-1585,共9页农业科学学报（英文版）

基　　金：This work was supported by the Special Fund for Agroscientific Research in the Public Interest,China(201503130).

摘　　要：The wide-precision planting pattern has become widely used in the North China Plain as a practice for increasing wheat yield.However,the effects of tilled ng developme nt and light tran smissi on within can opy on wheat yield un der differe nt sowi ng widths have not bee n clearly described.Therefore,a two-year experime nt was con ducted,in cludi ng four different seeding widths(6 cm,W6;8 cm,W8;10 cm,W10;12 cm,W12)and the traditional planting pattern with seeding width of 4 cm(W4).The results indicated mainly positive effects by the reduced intraspecific competition,specifically all three yield components of W6 and W8 were higher than those for W4.The configurations with more than 10-cm seeding width were mainly affected by the negative effect of a relative homogeneous canopy,leading to the weakened light transmission,leaf senescence,and reduced grain number per spike.Finally,the yields of W6 and W8 were significantly higher than that of W4,whereas the yield in W12 was lower(though not significantly)than W4.In wheat production,therefore,the appropriate seeding width of 6-8 cm is recommended for farmers,whereas the too wide seeding width,with more than 10 cm,should be avoided.

关 键 词：LIGHT TRA nsmissi on seedi ng width TILLERS NU mber win ter wheat yield COMP orients 

分 类 号：S512.1[农业科学—作物学]