广西来宾市兴宾区甘蔗专用肥三要素参数及配方研究

[目的]确定广西来宾市兴宾区的甘蔗专用肥的三要素参数及配方。[方法]以甘蔗品种新台糖16号为试材,在分析土壤养分状况的基础上进行N、P、K缺素试验。[结果]多点采样分析表明,该区的土壤偏酸性,有机质和速效磷处于中等水平,碱解氮处于中下水平,速效钾处于中高水平。测算出的三要素的土壤产蔗能力分别为59 580、76 110和69 810 kg/hm2。根据广西旱地甘蔗模式施肥公式,计算出该蔗区甘蔗的目标产量达到90 000 kg/hm2时,N、P2O5、K2O的需求量分别为266.10、134.70和180.30 kg/hm2。根据GB15063-2001技术标准,将甘蔗专用肥配方确定为占总养分26%,NP∶2O5∶K2O=126∶8∶。应用试验证明,甘蔗专用肥比传统常规施肥增产22.07%,蔗糖分增加0.65个百分点。[结论]该研究研制的甘蔗专用肥适用于广西来宾市兴宾蔗区。

Studies on the Three Elements Parameter and Formula of Sugarcane Special Fertilizer Suitable in Xingbin District of Laibin City in Guangxi Province

[Objective] This study aimed to confirm three elements parameter and formula of sugarcane special fertilizer in Xingbin District,Laibin city,Guangxi Zhuang Autonomous Region.[Method] With the sugarcane variety ROC 16 as tested material,the nutrient deficiency treatment of three elements(N,P,K) was tested on the basis of analyzing soil nutrinet conditions.[Results] The multi-point sampling and analysis showed that the soil in this area was weak acidity,organic matter and available phosphorus contents were at middle level,alkali dispelled nitrogen contents was lower,available potassium contents was higher.The ability of producing sugarcane in soil corresponding to N,P and K were counted as 59 580,76 110 and 69 810 kg/hm2 respe.On the basis of fertilizing formula of sugarcane model in dry land in Guangxi,when the target yield of sugarcane in this area was 90 000 kg/hm2,the quantity demanded of N,P2O5,K2O was counted as 266.10,134.70,180.30 kg/hm2 resp.,on which,the total nutrient content of the sugarcane special fertilizer was designed to be 26% and the ratio of N,P2O5 and K2O was 12∶6∶8 on the basis of compound fertilizer's technical index GB15063-2001.The application test showed that the yield and sugar content of sugarcane with the special fertilizer were 22.07% and 0.65% higher than that with the traditional fertilization resp.[Conclusion] The sugarcane special fertilizer developed in this research was suitable to be applied in sugarcane-growing area in Laibin city of Guangxi province.