硅钙镁磷钾肥在海南甘蔗上的施用效果研究

Application Effects of Silicon Phosphorus Potassium Calcium Magnesium Fertilizer on Sugarcane in Hainan

为了探讨硅钙镁磷钾肥在甘蔗上的施用效果,通过采用田间小区试验,研究了硅钙镁磷钾肥不同用量对甘蔗产量、蔗糖含量和土壤养分含量的影响。结果表明,施用硅钙镁磷钾肥较习惯施肥能够有效提高甘蔗产量,较习惯施肥增产1.8%~9.8%,施用量为1 500 kg/hm^2时产量最高,且随着施用量的增加呈增大趋势,施用量达到1 875 kg/hm^2后,产量有所下降。施用硅钙镁磷钾肥能有效提高甘蔗蔗糖含量。随硅钙镁磷钾肥施用量增加,硅钙镁磷钾肥能提高土壤有效磷、速效钾和pH值,改良酸性土壤。综合试验结果,硅钙镁磷钾肥用量以1 500 kg/hm^2在甘蔗上的应用效果最佳。

For purpose of exploring the effect of application of Silicon Phosphorus Potassium Calcium Magnesium on sugarcane ,the field plot experiments were carried out to study the effects of different application amounts of Silicon Phosphorus Potassium Calcium Magnesium fertilizer on sugarcane yield, sucrose content and soil nutrients.The results showed that compared with the application of conventional fertilizer, the application of Silicon Phosphorus Potassium Calcium Magnesium could effectively improve sugarcane yield.In general ,the yield had increased by 1.8%-9.8% with the different application amounts of Silicon Phosphorus Potassium Calcium Magnesium fertilizer than that of conventional fertilizer application,and under the application of 1 500 kg/hm2,it provided the highest yield.But when the application reached 1 875 kg/hm2, it showed slight decrease in yield. The application of Silicon Phosphorus Potassium Calcium Magnesium fertilizer could also effectively improve the sucrose content of sugarcane.With the increase in application amount of Silicon Phosphorus Potassium Calcium Magnesium fertilizer,the available phosphorus and available potassium in soil increased,and so did the soil pH value,which helped to improve the acidic soil.Through observation to the comprehensive test results,the optimum application amount of Silicon Phosphorus Potassium Calcium Magnesium fertilizer on sugarcane is 1 500 kg/hm2.