Effects of silicon-calcium-phosphorus fertilizer on sugarcane growth and soil fertility of acidified filed

ObjectiveThe present study was conducted to discuss effects of silicon-calcium-phosphorus fertilizer with different proportions and organic fertilizer on sugarcane growth and soil nutrient, in order to provide scientific evidences for increasing yield and quality of sugarcane. MethodAcidified field for continuous sugarcane growth was selected in the research. Six treatments were set, such as treatment A(CK, applying nitrogen and potassium fertilizers). On the basis of treatment A, different proportions of silicon-calcium-phosphorus fertilizer and organic fertilizer were applied: treatment B (SiO2 450 kg/ha, CaO 300 kg/ha, P2O5 225 kg/ha), treatment C(SiO2 450 kg/ha, CaO 300 kg/ha, P2O5 300 kg/ha), treatment D(SiO2 450 kg/ha, CaO 450 kg/ha, P2O5 225 kg/ha), treatment E(SiO2 450 kg/ha, CaO 450 kg/ha, P2O5 300 kg/ha), treatment F(treatment B+organic fertilizer 7500 kg/ha). Agronomic traits like emergence rate, yield, brix, nitrogen phos-phorus and potassium content in different parts of sugarcane, soil nutrient content in sample soil were measured. ResultCompared with CK,different treatments posed significant influence on sugarcane tiller, height, millable stalks and yield (P<0.05, the same below). Treatment E and F increased yield by 23.06% and 22.53% respectively. Application of organic fertilizer on basis of silicon-calcium-phosphorus fertilizer posed considerable effects on nitrogen and potassium accumulation in steam, yet it had no obvious influence on phosphorus nutrient accumulation(P>0.05, the same below). At the same time, soil pH improved 0.11-0.38 compared with CK, but no significant effect on soil nutrients were shown. ConclusionApplication of silicon-calcium-phosphorus and organic fertilizer on basis of nitrogen phosphorus and potassium fertilizer can increase number of base cations in soil, reduce contents of exchangeable acidity and exchangeable aluminum, effectively alle-viate soil acidification procedure. Application of SiO2 450 kg/ha,CaO 300 kg/ha, P2O5 225 kg/ha and organic fertilizer 7500 kg/ha promotes nitrogen and potassium nutrient accumulation in steam, increase sugarcane yield and alleviate soil acidification.