Effects Of Silica Sol On Soil Nutrient Availability And Nutrient Absorption And Production Of Rice

Rice is an important food crop in China, at the same time is also a kind of silicon crops.In the case of multiple cropping and high-yielding, most of the rice planting area in our country are short of silicon, which affect the rice yield.Ordinary silicon fertilizer could promote th e rice growth, but also can cause soil and water pollution.Nano silicon sol is an effective and no pollution, easily absorbed, environmentally friendly fertilizers. Rice cultivar Dongnong 427 was used as material under the condition of potted routine management. Different nano silicon sol, Nano Si-50、Nano Si-60、NanoSi-RH、Nano QSi-50、Nano QSi-60 and a matched group CK, were spraying at the tillering and booting stage respectively, then available N, available P, available K, available Si in the soil;total N, total P, total K, available Si in the plant content of different treatments on three prime periods of rice growth, the rice yield and the composition of rice production factors(effective ear, plant height, spike grain number, seed setting rate and grain) were tested, to study the absorption of nutrients in the soil, plant nutrient content and the influence of yield components by spraying nano silicon sol.To reveal the physiological functions of nano silicon sol on rice and clarify its mechanism of crop nutrient absorption, guide for rice production. The results showed that: 1. The formulation of spraying different silicon can improve the effectiveness of the soil nutrient level. To improve soil alkaline hydrolysis N than CK by 5.96%- 32.73%, the most significant effect of tillering stage is Si-50; Soil available P was increased than CK by 7.36%- 30.47%, tillering stage Si-60 effect is obvious; Available K content than CK increased by 49.72%- 68.41%, the most significant effect of QSi-50 at booting stage; Effective silicon content increased by 7.43%, 39.15%, QSi-60 for effective silicon at booting stage. 2. Spraying silicon preparation can promote absorption of nitrogen and phosphorus nutrition of rice. Plant nitrogen content increased by 10.32%- 52.88%, grain nitrogen content increased by 21.07%- 30.46%, at tillering stage the most significant effect is QSi-50; Phosphorus content in plants increased by 3.20%- 37.30% and grain phosphorus content increased by 1.40%- 19.74%, the most significant effect is QSi-60, at tillering stage. 3. Spraying different silicon preparation can gain rice production, reduce plant height,increase effective number of ears, grain number of per spike. Rice yield increased by 15.72%- 25.25%(p < 0.05), the Si-60 production value maximum at tillering stage, 216.63 g/basin; Rice plant height redused by 3.31%- 7.42%,Si-RH have the most significant effect; Effective panicle number increased by 3.45%- 14.29%, Si-60 effect is the most obvious tillering stage; Spike grain number increased by 5.36%- 9.75%,QSi-50 is the best; Seed setting rate increased by 2.37%-3.49%, spraying Si-60 effect is good at tillering stage. Rice grains increased by 1.55%- 2.07%, Si-60 largest grain at tillering stage.