Effect Of Silicon Application Ammount On Rice Growth And Its Nutrient Absorption

In order to investigate the silicon fertilizer application rate at different level of silicon fertilizer amount of double cropping rice effects and nitrogen, silicon fertilizer application effect on growth, development and yield of double cropping rice, respectively in 2014 to carry out the pot trial test and 2015 to carry out the field test, to study the effects of different application amount of silicon, nitrogen silicon fertilizer on the double cropping rice growth and development, nutrient uptake and utilization, etc influence. The main research results are as follows:1.Effect of Different Fertilizer on the growth and development of riceTwo test results show that the proper application of silicon fertilizer can improve the yield of double cropping rice. In high silicon and medium silicon fertilizer level, the silicon fertilizer level in early rice,yield decreased with the increase of silicon content. by adjusting the level of silicon fertilizer, rice yield were in silicon fertilizer amount(SiO2)0.2g / kg reached highest, lack of silicon soil is in SiO2 0.4g/kg level; and control compared to lack of Soil Silicon on silicon fertilizer early, late rice yield increase respectively 44.6% and 50.7% rise significantly higher than the other two kinds of soil.2.Effects of combined application of nitrogen and silicon on growth and development of riceUnder the same nitrogen level, yield of rice in the morning and evening are increased with increasing the amount of silicon fertilizer, both early and late rice, rice yields were the highest fertilizer amount reached highest. Yield component factors,effective panicle number per unit area, number of grains per panicle were silicon fertilizer was increased with the increase, 1000 grain weight among the treatments of little difference.In the same application rate of nitrogen under the conditions and different rice the number of tillers per plant showed first increased and then decreased trend. Under no nitrogen fertilizer, applying silicon tiller number was greater than without silicon fertilizers,especially to the Si12 level can evidently promote the tillering. Applying silicon fertilizer can also increase population leaf area, increase the chlorophyll content in the leaf, thereby increasing the photosynthetic efficiency of rice leaves.3.Effect of combined application of nitrogen and silicon fertilizer on nutrient uptake of riceThe test results show that the increasing amount of silicon fertilizer could promote rice of N, P, K uptake and accumulation, and the tendency for increased first and then decreased, accumulation of Si element increases with the increase of silicon content in fertilizer, nitrogen, phosphorus, potassium and silicon element accumulation had significant positive correlation with the yield of rice.