基于缺素试验的甘蔗专用肥三要素参数及配方研究——以广西桂中蔗区为例

Studies on the Three Elements Parameter and Formula of Special Fertilizer for Sugarcane——Take the Middle Area of Guangxi as An Example

进行N、P、K缺素试验,测算出三要素土壤原料蔗生产能力hm2分别为64065kg、71280kg、69690kg,根据广西旱地甘蔗模式施肥公式,计算出针对该蔗区目标产量达到90000kghm-2时,N、P2O5、K2O三要素吸收参数-hm2分别为226.91kg、181.55kg、181.42kg,根据GB15063-2001复混肥料技术标准,初步设计针对该蔗区甘蔗专用肥配方养分总量为26%,N、P2O5、K2O=10:8:8。依此配方生产样肥在该蔗区进行肥效验证,比对照增产、增糖分别为21.54%、0.78%(绝对值)。确定针对桂中部分蔗区的甘蔗专用肥配方,提供生产企业进行产业化生产与推广应用。

According to the nutrient test of N,P and K in the soil,the highest yield of sugarcane was 64065 kg,71280 kg and 69690 kg per hm^2 respectively.On the basis of the model and parameter for fertilization on upland in Guangxi,Considering the target yield at 90000 kg per hm^-2,the quantity demanded of N,P 2 O 5 and K 2 O was 226.91 kg,181.55 kg and 181.42 kg per hm^2 respectively.The total nutrient content of the sugarcane special fertilizer was designed to be 26% and the ratio of N,P 2 O 5 and K 2 O was 10：8：8 on the basis of compound fertilizer＇s technical index GB15063-2001.Then,the effects of the designed special fertilizer were tested in cane growing areas.The results showed that the cane yield and sugar content was 21.54% and 0.78% higher than that of the control respectively.Finally,the formula of sugarcane special fertilizer in the Middle Area of Guangxi sugarcane growing areas was determined,which could provide reference for manufacturers in the industrialized production and extension of sugarcane special fertilizers.