Effects of Nitrogen Application Amount and Seedling Number on Grain Yield,Population Quality,Protein Content and Its Components in Wheat Variety Ningyan 1

Effects of nitrogen application amount and basic seedling number on grain yield,protein and its component contents in wheat variety Ningyan 1 were studied at the experiment field of Jiangsu Coastal Agricultural Research Institute during 2003~2004.The results showed that grain number per spike,protein and its component contents increased with the increase of nitrogen application amount at the same basic seedling number,while 1000-grain weight decreased.Ear number per unit area,dry matter accumulation amount after anthesis, leaf area index at heading stage and grain yield increased with the increase of nitrogen application amount when the basic seedling number was 90~180×104/ha,but those could decrease when the basic seedling number was over 270×104/ha.Grain number per spike,protein and its component contents decreased with the increase of basic seedling number at the same nitrogen application amount.When nitrogen application amount was 180 kgN/ha,ear number could increase with the increase of basic seedling number.According to the results above,the suitable combination of nitrogen application amount and seedling number for high yield and good quality in wheat variety Ningyan 1 was 180 kgN/ha and 270×104/ha basic seedling number or 240 kgN/ha and 180×104/ha basic seedling number.