Different Concentrations Of Silica Preparations On Soil Fast-acting Nutrients And Phyllosilicate,Phyllosilicate Carbon

Rice is a major food crop and a typical silica-loving crop.Due to the expansion of high-yielding rice cultivation area,silicon deficiency in rice is becoming an increasingly serious problem.Some studies have shown that the application of silicon formulations can significantly increase the silicon content of rice and promote the accumulation of phylloso mes.The enhancement of silicon content and phyllosome further promotes rice growth and development and stress tolerance,thus increasing yield.In addition,the application of silicon formulations improves soil structure and increases soil nutrient retention capacity,which in turn improves soil nutrient indicators.Thus,silicon formulations improve rice yields through a combination of increasing rice silicon content and phyllosilicate carbon,promoting growth and development and stress tolerance performance,and improving soil nutrient status.Rice Dongfu 125 was used as the test material and Si-TG(made from tetraethyl orthosilicate)and Si-50G(made from aminopropyltriethoxysilane)were applied at 0.3%,0.6% and 0.9%concentrations at the tillering and gestation stages.The dynamics of soil fast-acting nutrient content,rice plant silica,phyllosilicate,phyllosilicate carbon content,dry matter phyllosilicate carbon content and yield changes were studied at the tillering,gestation and maturity stages o f rice.This study has important implications for the rational application of silica preparations to improve rice production efficiency and protect the soil ecological environment.The results of the study are as follows:(1)Application of silicon preparations at different periods significantly increased the effectiveness of soil fast-acting nutrients,with the tiller stage being better than the gestation stage.Compared with CK,alkaline nitrogen content increased by 5.99%-24.36%,with 0.6% Si-TG being the most effective at the gestation stage;fast-acting phosphorus content increased by4.87%-23.86%,with 0.6% Si-TG being the most effective when applied at the tillering stage;fast-acting potassium content increased by 4.38%-20.77%,with 0.9% Si-TG being the most effective at the tillering stage The effective silicon content increased by 9.24%-27.6%,with 0.9%Si-TG being the best treatment at the tiller stage..(2)Application of silicon formulations at different periods significantly increased the silico n content of all parts of the plant,with the gestation period being better than the tillering period,with the highest silicon content in leaves,followed by stalks and the lowest in roots.Compared with CK,the silicon content of leaves and roots increas ed by 3.59-36.13% and 17.88%-95.33%.0.9% Si-50 G was best applied at the gestation stage,and the silicon content of stalks increased by5.83%-14.31%,and its concentration of 0.6% Si-50 G was best at the tillering stage.(3)Application of silicon formulations at different periods significantly increased rice phytoplankton,phytoplankton carbon content and dry matter phytoplankton carbon content,and the distribution trend of phytoplankton content in rice plants was: leaves > stems > roots,The tiller stage was better than the gestation stage.Compared with CK,the phyllosilicate content of leaves,stalks and roots increased by 3.59%-30.25%,6.16%-45.7% and 21.75%-95.33%,respectively,with the best effect of 0.9% Si-50 G treatment.Leaf and stalk phyllosilicate carbon content increased by8.77%-37.18% and 9.82%-44.35% respectively,with 0.9% Si-50 G being the most effective when applied at the tillering stage;root phyllosilicate carbon content increased by 15.06%-59.06%,with0.6% Si-50 G being the most effective when treated at the gestation stage.Leaf and root dry matter phytosilicate carbon content increased by 22.64%-67.92% and 114.29%-180% respectively,with 0.9%Si-50 G being the most effective application;stem dry matter phytosilicate carbon content in creased by 15.38%-55.26%,with 0.9% Si-TG being the most effective application at the tillering stage.(4)Application of silicon formulation at different periods could improve rice yield,with the tillering stage being better than the gestation stage.Co mpared with CK,the highest yield,spike number and thousand grain weight were achieved with 0.6% Si-50 G at tillering stage,with 21.19%,22.67% and 8.23% increase respectively.The highest effective spike number and fruit set rate were achieved under 0.6% Si-TG treatment,with an increase of 30.38% and 19.86%,respectively.The highest yield,effective spike number and grain number were achieved under 0.6% Si-50 G treatment with 18.82%,25.58% and 19.27% increase respectively.0.6% Si-TG had the highest yield and thousand grain weight with 7.54% and 11.46% increase respectively..