Effect Of Application Stage Of Panicle Fertilizer On Yield And Quality Of Hybrid Rice

In this study,Y Liangyou 6 and Y Liangyou 900 were used as experimental materials to study the effects of different nitrogen application rates on the yield of rice under the same nitrogen application rate in the rice network of Hunan Academy of Agricultural Sciences from April to October in 2016,Yield formation,population quality,per panicle structure and rice quality,in order to provide some theoretical basis for high yield and high yield of rice,increase nitrogen use efficiency and reduce environmental pollution from cultivation angle.The main findings are as follows:1.The effect of panicle application stage on rice yield and yield structure was significant.At the same nitrogen application rate(300kg·hm^-2 in this experiment),the yield of spikelets was the highest in the two stages of spike differentiation stage 2,and the1000-grain weight and effective panicle number were the important Factor,and 1000-grain weight,seed setting rate and effective panicle number are the important factors for the increase of Y Liangyou 900 production.The grain yield,seed setting rate and effective panicle number of Y Liangyou 6 were higher than those of Y Liangyou 900,but the total grain number per panicle was less than that of Y Liangyou 900,and the final yield was not significant.The results of this study show that the same amount of nitrogen and spike differentiation in the first two stages of the application of panicle fertilizer can be high yield.2.The effect of panicle application stage on rice population was significant.Y Liangyou 6 decreased with the decrease of leaf area index,but the SPAD value,net photosynthetic rate,grain-leaf ratio and total spikelet volume increased,and the decay rate of green leaf area decreased,which was beneficial to later photosynthetic production and The results showed that the leaf area index and the total spikelet amount of Y Liangyou900 decreased with the increase of SPAD,net photosynthetic rate and grain-leaf ratio after heading stage.In this experiment,the photosynthetic productivity was higher,the dry matter accumulation was higher,the ratio of grain to leaf was appropriate,and the source-reservoir relationship was the highest in the second stage of spike differentiation.3.The spikelet application period was significant for the differentiation and degradation of rice stem and spikelets,and finally affected the total spikelet number at maturity.Under the same nitrogen application rate,Y Liangyou 6 and Y Liangyou 900 had better fertilization in the early stage of spike differentiation and spike differentiation stage 2,and the total showed that the differentiation of stem and spikes increased and the differentiation was decreased.The results showed that the stem and spikelet treatments were lower in the two treatments.4.The effect of panicle fertilizer on rice quality was significant.With the delayed application of panicle fertilizer,the brown rice rate,milled rice rate and whole milled rice rate of 2 varieties increased,and the difference was significant compared with the control.The chalkiness and chalkiness rate increased,and the effect on length and aspect ratio was not significant.Strepta starch decreased,gel consistency and protein content increased significantly.2 varieties in the spike differentiation stage 2 application of panicle fertilizer,can get a better appearance quality,cooking and nutritional quality,while high yield.In the above,the effect of two cultivars was the best in the second stage of spike differentiation,and the yield was the highest.Under the same nitrogen application rate,heavy processing base tiller fertilizer was the worst,the lowest yield,long past serious waste,so to find a highly efficient and energy-saving fertilization method to improve the utilization of nitrogen fertilizer and cultivate high-yielding high-quality rice,so as to provide some theoretical and practical basis for the current rice production technology.