国家标准规定收获机在额定喂入量及籽粒含水率为15％～20％,谷草比为1:1.5的条件下,总损失率应小于等于2％(收获小麦)。收获作业损失往往不被重视,特别在收获作业后期或多雨季节,由下例可看出收获作业与损失的关系。 假如每公顷土地小麦产量为5000公斤,若谷物损失率为1％,每公顷地将损失50公斤;若谷物损失率为4％,每公顷地即损失200公斤。收获机每小时收获2公顷地,8小 The national standard stipulates that the total loss rate of harvesters should be less than or equal to 2% (harvested wheat) under the condition of rated feed amount and grain moisture content of 15% ~ 20% and the ratio of grain to straw of 1: 1.5. Harvesting loss of work is often not taken seriously, especially in late harvesting or rainy season, the following example shows the relationship between harvesting operations and losses. If 5,000 hectares of wheat are produced per hectare of land, 50 kg will be lost per hectare if the loss of cereal is 1% and 200 kg per hectare if the loss of cereal is 4%. Harvester harvest 2 hectares per hour, 8 small