Abstract: Tapping panel dryness（TPD） has become one of the important factors restricting the development of natural rubber production. It is an urgent task to develop simple and efficient prevention and treatment technology for TPD. This paper studied on pan granulation of humic acid based on slow-release conditioner for TPD recovery in Hevea brasiliensis. Through orthogonal experiment, this paper analyzed the effect of disc angle, disk speed and binder on slow-release particles granularity, particles strength and disintegration rate; decided the reasonable prilling, rotating speed 60 r/min, dip angle of 30° and chitosan as binder. The properties of the slow-release particles conditioner prepared by optimum process conditions were as following: the granularity was 91.5%, particle strength 34.1 N, and disintegration rate 10%. Granularity and particle strength had reached the national standard of compound fertilizer. Judging from the disintegration rate, preparation of particle had certain slow-release performance. This study provided technical support for simple and efficient prevention and control of rubber tree TPD.

Key words: Hevea Brasiliensis, tapping panel dryness（TPD）, humic acid, pan granulation, orthogonal experiment

摘要： 橡胶树死皮已成为制约天然橡胶生产发展的重要因子之一，研发轻简、高效的死皮防治技术是目前橡胶生产中亟需解决的问题。以腐植酸为载体，对橡胶树死皮防治缓释颗粒调理剂的圆盘造粒工艺进行了研究。通过设计正交试验，分析了圆盘倾斜角度、圆盘转速及粘结剂对缓释颗粒调理剂的粒度、颗粒强度及颗粒崩解率的影响，确定了合理的造粒工艺：圆盘转速为60 r/min、倾角30°，粘结剂为壳聚糖。最优工艺条件下制备的缓释颗粒调理剂的粒度为91.5%、颗粒强度为34.1 N、崩解率为10%，粒度及颗粒强度已达国家复合肥标准相关要求；从崩解率看，所制备的调理剂颗粒具有一定的缓释性能。本研究的开展可为实现轻简、高效的橡胶树死皮防控提供技术支撑。

关键词: 橡胶树, 死皮, 腐植酸, 圆盘造粒, 正交试验