| 【Objective】 In order to understand the main production characteristics of new super rice varieties bred by
the Rice Research Institute of Guangdong Academy of Agricultural Sciences, the relationship between super rice yield and
agronomic characters was studied in Huiyang District, Huizhou City, Guangdong Province in 2018.【Method】Six super rice
varieties were selected for the experiment according to the general method of field production management under the level of
high nitrogen fertilization. The randomized block test field design was used to obtain the data of 10 individual plants by field
sampling and indoor seed testing with the conventional method for measuring agronomic characters（3 repeated tests）.
Microsoft Excel was used for data processing, and advanced edition of DPS data processing system V17.10 for variance
analysis.【Result】The total biomass was positively correlated（r=0.701）with the growth period, and the longer the growth
period（Wuyou308, 144 d）was, the higher the total biomass（4 104 kg）was. The best regression equation and adaptive season（ES: early season, LS: late season） for high yield and stability of each character were as: whole growth period（d）
Y1=-141.952+2.18182X（Wuyou308, ES and LS）; maximum seedling number Y4=-0.8974+1.07865X（Hemeizhan, ES and
LS）; plant height Y3=-40.7206+1.42857X（Jinnongsimiao, ES and LS）; effective panicle number Y3=10.8786+0.58983X
（Jinnongsimiao, ES and LS）, Y5=5.3751+0.81356X（Yuxiangyouzhan, ES and LS）; spikelet number per panicle
Y6=57.5266+0.91591X（Guinongzhan, ES and LS）; 1000-grain weight Y1=32.0460-0.28571X（Wuyou 308, ES and LS）.
【Conclusion】Super rice varieties（combinations）are suitable for high yield creation activities under the condition of high
nitrogen fertilizer application. For the right varieties in the right season, the application of high nitrogen fertilizer can show the
best yield level, such as the application of Guinongzhan in the late season of South China rice region. |
