| Silicon can promote the nutrient absorption of rice and increase its yield.In this experiment,rice Dongnong 427 is used as test materials with planting in the pot.Spraying 5 kinds of siliceous fertilizer of Si-50-G(nano silicon containing amino acid),Si-60-G(nano crystalline silicon containing epoxy group)and Si-RH,Si-50,Si-60using equal water as CK in tillering stage and booting stage to study the content of available nitrogen,available phosphorus,available potassium content and available silicon content in cultivated soil.At the same time,the content of total nitrogen,phosphorus,potassium,and the corresponding silicon content,chlorophyll,proline content in each stage were calculated.After the maturity of rice,the yield and its components of rice were measured after the application of all kinds of silicon,to guide later production.The results showed that:(1)In rice tillering stage and booting stage spraying appropriate preparation of silicon can improve soil nutrient availability.Compared with CK,spraying at tillering stage,soil available potassium increased 27.03%(P>0.05)-70.92%(P<0.05);soil available silicon content increased 0.05%(P>0.05)?8.63%(P<0.05);Si-60-G is the best treatment.In the booting stage,spraying silicon can make soil nitrogen content increased 4.15%(P>0.05)?12.71%(P<0.05).In these processes,Si-60-G is the best treatment;soil available phosphorus content increased 5.06%(P>0.05)?26.10%(P<0.05),Si-50-G is the best treatment.(2)In rice tillering stage and booting stage spraying appropriate preparation of silicon can improve the nutrient content of rice plants.Compared with CK,spraying silicon in tillering and booting stage of rice could increase the total nitrogen content,the value increased by 4.62%(P>0.05)?52.03%(P<0.05);total nitrogen content in rice by spraying Si-60-G at booting stage reached the most,significantly improved 41.97%.Spraying silicon at booting stage can make the total phosphorus content in plants increased,the value increased by 3.55%(P>0.05)-34.69%(P<0.05),the Si-60-G is the best treatment;the total phosphorus content of rice reached the best at tillering stage with Si-60-G significantly increased 26.61%compared with CK.Spraying silicon in tillering stage can make the contents of total potassium content increased 0.10%(P>0.05)?15.43%(P<0.05);all the treatment decreased the total potassium content of rice,but the difference was not significant.Spraying silicon in booting stage can make effective silicon content of plants increase 3.77%(P>0.05)?14.61%(P<0.05);effective silicon content in rice reached the best by spraying Si-60-G in tillering stage which significantly increased 11.71%compared with CK.(3)In tillering stage,spraying different silicon preparation can improve the photosynthetic pigment content in rice leaves by 4.80%?12.10%(P>0.05);In booting stage,spraying different silicon increased the photosynthetic pigment content of 4.87%?14.59%(P>0.05)compared with CK in addition to Si-60 treatment.Spraying each silicon preparation in tillering and booting stage can increase the proline content of rice leaves by 0.4%?42.99%(P>0.05)compared with CK.Proline content reached maximum with Si-60 treatment,in tillering stage and booting stage were 470?g·g-1 and 375 ?g·g-1 respectively.(4)Spraying different silicon preparation can increase the rice yield by 10.52%(P>0.05)?15.25%(P<0.05),and decreased the plant height by 3.53%?8.01%(P>0.05).In the tillering stage,spraying Si-60-G can increase rice yield and can make panicle number reached the maximum(P<0.05).Different treatment can make the rice grain number increase by 0.97%?10.08%(P>0.05);can increase the seed setting rate by 2.13%?6.49%(P>0.05);thousand grain weight increase 4.44%?14.98%(P>0.05).Each index had the best effect when spraying Si-50-G in tillering stage. |
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