大颗粒尿素是属于采用物理法生产的限制溶解类缓释尿素,其粒径为2～12mm,与普通尿素相比,大颗粒尿素表面光洁圆滑,颗粒均匀,不易粉碎和吸潮结块,适合于长距离运输和存贮。在田间施用时,大颗粒尿素肥效持久,氨损失率低,增产增收效果明显。虽然大颗粒尿素的销售价格高出普通尿素1 Large particles of urea are controlled by the physical method of production of limited release of slow-release urea, the particle size of 2 ~ 12mm, compared with ordinary urea, large particles of urea surface smooth and smooth, uniform particles, not easy to smash and moisture absorption caking, suitable Transport and storage over long distances. When applied in the field, large particles of urea fertilizer lasting effect, ammonia loss rate is low, the effect of increasing production and income significantly. Although the sales price of large particle urea is higher than ordinary urea 1