关键词: 橡胶树, 死皮, 腐植酸, 圆盘造粒, 正交试验

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