Effects of Different Plant and Row Spacing and Seeding Number per Hole on Yield

SUN Jianjun; CHEN Xiangong; YIN Haiqing; WANG Fuhua; WANG Ya; WANG Yuetao; XIA Yan; WANG Shengxuan?

doi:10.15933/j.cnki.1004-3268.2016.03.008

Abstract：In this paper,the effects of different plant and row spacing and seedling number per hole of japonica rice on yield were studied with the medium-maturing medium japonica rice Zhengdao No. 19 as experimental material. The results showed that the effects of different plant and row spacing and seedling number per hole on yield and its components of Zhengdao No. 19 were all significant. The correlation analysis showed that there were significant correlations between plant spacing,seeding number per hoel and yield;the ear number,total spikelet number,seed setting rate were significantly positively correlated with yield;the total spikelet number was significantly positively correlated with ear number,seed setting rate;grain number per ear was significantly positively correlated with thousand-grain weight; the ear number was significantly negatively correlated with grain number per ear,thousand-grain weight;the total spikelet number was significantly negatively correlated with thousand-grain weight. The path analysis showed that the order of contribution to yield of Zhengdao No. 1 was total spikelet number>seed setting rate>thousand-grain weight,and the order of contribution to total spikelet number was ear number>grain number per ear. The yield of treatment with wide and narrow row spacing was significantly higher than that of treatment with equidistant row,and the yield of treatment with three seedlings per hole was significantly higher than the other treatments. The treatment A2B3C3 had the highest yield of 8 899. 51 kg/ha,which increased by 4. 53%—34. 80% compared with the other treatments. The treatment A2B4C3 had the second yield of 8 513. 60 kg/ha, which increased by 5. 47%—28. 96% compared with the other treatments.