Response Of Early Rice Yield And Rice Quality To Coupling Of Fertilizer And Density

In the paddy field of the practice base of Hedong farm in Liuyang City,Hunan Agricultural University,the split plot design was used to study F1(no fertilization),F2(conventional urea),F3(resin coated urea: conventional urea = 5:5),F4(resin coated urea and conventional urea are reduced by 30%),F5(resin coated urea and conventional urea are reduced by 30% and organic fertilizer is applied),F6(resin coated urea and conventional urea are reduced by 30% respectively)The effects of fertilization mode of 30% reduction of urea and 30% reduction of conventional urea combined with biochar and density of M1(11cm × 25cm),M2(14cm × 25cm),m3(17cm × 25cm)on rice yield formation,rice quality,rice flour rice and feed rice cultivation were studied in order to provide technical support for the early rice cultivation system of high yield and high quality machine transplanting in Liuyang area.The main results are as follows:1.Different fertilization and density treatments can increase the yield of Luliangyou996 and zhongjiazao17,mainly by increasing the number of effective panicles,seed setting rate and grain number per panicle.Compared with no fertilization,the yield of Lu Liangyou996 was the highest in F4M1(30% for resin coated urea and conventional urea,11 cm ×25cm),F5M2(30% for resin coated urea and conventional urea,14 cm × 25cm)and F3M3(5:5 For resin coated urea and 17 cm × 25 cm for conventional urea),with an increase of75.99%,84.35% and 48.55% respectively.The yield of zhongjiazao 17 was increased by F3(tree height)at different densities The treatment of fat coated urea: conventional urea = 5:5)was the highest,with an increase of 99.43%,75.80% and 74.23% respectively.2.Fertilization treatment can improve the milled rice rate,aspect ratio,alkali elimination value,protein,brown rice rate,alkali elimination value and protein of Luliangyou 996,but has little effect on gel consistency and amylose content.The disintegration value,reduction value,gelatinization temperature of Luliangyou 996,the final viscosity and reduction value of zhongjiazao 17 were not affected by fertilization.3.The amino acid content of Lu Liangyou 996 in F2(conventional urea),F3(resin coated urea: conventional urea = 5:5),F5(resin coated urea and conventional urea reduced by 30% respectively and applied with commercial organic fertilizer)was better than that in zhongjiazao 17.4.As a whole,density treatment had little effect on rice quality of Lu Liangyou 996 and Zhong Jiazao 17.It mainly affects the whole rice rate of Lu Liangyou 996,the whole rice rate of zhongjiazao 17,protein and disintegration value,while the other indexes have little influence.