Effect Of Fertilization On Yield Traits Of Super Hybrid Rice In Jianghuai Watershed Area

In this study,Y Liangyou No.1,a super hybrid rice variety?combination?widely used in large-scale production,was selected as the experimental material.Two two-point trials were conducted in 2014 and 2015 in Chihe Town and Dingcheng Town,Dingyuan County.For nitrogen,phosphorus,and potassium,four levels of nitrogen fertilizer,4 levels of phosphate fertilizer,and 3 levels of potash were set.According to the actual production,14 kinds of nitrogen,phosphorus and potassium ratios were arranged to discuss the different ratios of nitrogen,phosphorus and potassium.With regard to the effects of rice tillers,yield traits,and yield,the most appropriate NPK fertilization rates and rational ratios for rice production in the Jianghuai watershed region were explored to maximize the economic benefits of fertilization.1 Rice tillers increase with the increase of nitrogen fertilizer application;Appropriate application of P and K fertilizers can effectively increase the number of tillers in rice,and excessive P and K fertilizers reduce the number of tillers in rice.Production should be based on the actual situation in the local,a reasonable application of nitrogen,phosphorus and potassium fertilizers,to promote effective rice tiller reaches a maximum value,provide the basis for high yield rice.2 The plant height of rice increased with the increase of nitrogen fertilizer application amount,and changed with the change of the application amount of phosphorus and potassium fertilizer,but the change was less affected by it.The effective panicles of rice increased with the increase of N,P,K fertilizer application amount.The effective panicles of N₂P₂K₂ level were the largest,and the excess NPK fertilizers decreased the effective panicles of rice.Appropriate nitrogen,phosphorus and potassium fertilizers could effectively increase the grain number of rice.The N₂P₂K₂ level had the largest number of rice grains.Excessive N and P fertilizers decreased the grain number of rice.The seed setting rate of rice decreased with the increase of the amount of nitrogen fertilizer application.Increase in the amount of application.3 The rice yield increased with the increase of N,P,K application amount.From the test results,when the application amount of N,P,K fertilizer was N₂P₂K₂,the rice yield was the highest,and the difference with other treatments reached a significant level;Phosphorus and potassium fertilizers,rice yield decreased;N₀P₀K₀ rice yield was the lowest,and the difference with other treatments reached a significant level,indicating that the test results are good.From the trial yield results,we can not blindly increase the application amount to increase production.