Abstract: The radiation-use efficiency ( RUE) increased is very important factor increases maize yield. Differ-ent planting patterns must effect yield and RUE of summer maize. In order to explore how to improve the RUE and increase the yield of maize,the test of different plant spacing on the yield and RUE of corn is studied. Experiments is in the Chinese Academy of Sciences Luancheng test station in 2012,and Xianyu 335 and Zhengdan 958 of two varieties are used that is in common in this area. Experiments are set 20 cm+100 cm,40 cm+40 cm,60 cm+60 cm,40 cm+80 cm of 4 row levels,in addition to density of the 40 cm+40 cm for 6.2 ×10⁴ plants/ha,other density for 7.5 ×10⁴ plants/hm². The results show that:leaf area index in the 60 cm+60 cm treatment of Zhengdan 958 is higher 5%-20% than in the other three treatments, Xianyu 335 higher 5%-17%;In the whole growth period RUE in the 60 cm+60 cm treatment of two varieties were higher than other treatments ranged from 10%to 30%;The total dry matter in the 60 cm+60 cm treatment of Xianyu335 is higher 10%-30% than in the other three treatments,Zhengdan958 higher 17%-25%;Harvest index and dry matter mass transfer rate of 60 cm+60 cm treatment of two varieties were also significantly higher than other treatments, thus improving the yield. Analysis shows that the solar radiation and temperature are main meteorological factors effect yield of summer maize,and ra-diation-use efficiency is affected by the temperature effect.

Key words: Maize, Row spacing, RUE, Grain yield

CLC Number: 

• S513