研究表明,在大田条件下调制干草营养物质的损失最大(高达40%)。在干草调制的干燥作业中,如积极地通风,在良好天气下营养物质的总收获量可提高16%,在不良条件下可提高35%,饲料营养价值提高18—25%,胡萝卜素的损失可缩小1.5—2倍,因而这种先进的干草收获方法应在各地推广使用。然而,在高湿度地带,因缺乏足够的工业变电站和通风 Studies have shown that modulation of hay nutrients under field conditions has the highest loss (up to 40%). In hay-conditioned dry jobs such as active aeration, the total amount of nutrients harvested in good weather can increase by 16%, under adverse conditions by 35%, feed nutritional value by 18-25%, loss of carotene Can be reduced 1.5-2 times, so this advanced method of hay harvest should be widely used around. However, in high humidity areas, due to the lack of adequate industrial substation and ventilation