Effect of coating thickness on spreader damage to encapsulated controlled-release fertilizer granules

被引：0

作者：

Parish, Richard L. ^{[1
]}

机构：

[1] Hammond Research Station, Louisiana Agric. Experiment Station, Louisiana State Univ. Agric. Center, 21549 Old Covington Highway, Hammond, LA 70403, United States

来源：

Applied Engineering in Agriculture | 2001年 / 17卷 / 04期

关键词：

Coatings - Crops - Granular materials - Impellers - Spreaders;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Coated controlled-release fertilizer granules can be damaged when applied by fertilizer spreaders. Physical damage to the coated granules can change the release rate of the nitrogen because the damaged coating will allow water to pass through the coating and dissolve the nitrogen. Six controlled-release fertilizers with nominal release rates from 70 to 700 days were applied with six spreaders, and samples of the applied products were tested for coating damage. There were highly significant differences in the amount of damage caused by different spreaders, with a rotary spreader causing the most damage and a fluted-wheel metering system and a drop spreader with a bar-type impeller causing the least damage. Nominal release rate had a significant effect on amount of damage, with the longer release rates (thicker coatings) having less damage. Even the highest damage levels were under 10%, thus observable differences in crop response are unlikely.

引用

页码：459 / 460