Influence of Row and Plant Spacing on Yield and Quality of Rice in Cold Area

The effects of plant and row spacing and seedling numbers per hill on the yield and quality of Kenjiandao5 planted in Daqing region were studied in 2009 adopting split-plot design method.The results indicated that,when the production patter were 6 seedlings per hill,10 cm of plant spacing and 30 cm of row spacing,the yield of Kenjiandao5 could reach 9 896.9 kg/hm2,its theoretical yield increased by 31.42% respectively compared with the conventional production pattern(4 seedlings per hill,13.3 cm of plant spacing,and 30 cm of row spacing),difference reached very significant level.Plant spacing and row spacing were negatively correlated with the yield,difference reached significant or very significant level.Among plant spacing,row spacing,and seedling numbers per hill,plant spacing was the most important limiting factor for high yield.With the increase of plant spacing,the content of crude protein decreased while the content of amylose increased.The mouth feels and taste score were best when the seedling numbers per hill was 2,the poorest when the number was 6.By comprehensive comparison,the pattern of 6-8 seedlings per hill,10.0 cm of plant spacing,and 30.0 cm of row spacing were the best for Kenjiandao5 in Daqing region.