甘蔗测土配方施肥技术的研究与应用

STUDY AND APPLICATION OF TECHNIQUE OF SUGARCANE RATIONAL FERTILIZER ON DETECTED SOIL

根据多年甘蔗肥料试验的结果，提出了甘蔗测土配方施肥的有关技术参数，即产１ｔ甘蔗的需肥量、土壤的供肥能力和尿素、钙镁磷肥、氯化钾的当年利用率。把测土施肥计算公式应用于甘蔗，并作了改进。几年的推广应用结果表明，使用该项技术可以减少施肥的盲目性，减少对肥料的投资，增加甘蔗的产量和蔗糖分，提高经济效益。至１９９０年止，该项技术在广西川个县市的甘蔗产区推广应用，累计面积达８．６７万ｈｍ２以上。验收结果表明，有８８．６％的试验点比对照有明显的增产效果，平均增产９．７６５ｔ／ｈｍ２，蔗糖分提高０．３个百分点。

Based on the results of fertilizer experiments on sugarcane in several years,this paper proposed the parameters about sugarcane rational fertilizer on detected soil, which included the nutrients requirement per ton millable stalks produced, the nutrients allowance of soil and the utilization ratio of urea, calcium magnesium phosphate and potassium chloride.The formula of rational fertilizer on detected soil was applied to sugarcane, which was modified in some win. The results from applying to practices in several years, indicated that the blindness of manuring and the costs of fertilizers can be reduced, the yield and sucrose content and the economic effect can be increased.Up to 1990, this technique had been applied to fourteen counties and cities growing sugarcane in Guangxi,and the grand total area was more than 86. 7 thousand ha. From acceptance results, it was shown that the experimental plots with yield increasing were 88.6 percent in all the trials, the mean yield and sucrose content increased by 9.765t/ha and 0.3 percentages respectively.