不同收获方式含水率对油菜收获物流损失的影响

收获物流损失是影响油菜生产成本的重要因素，以DMH145油菜品种为对象，在丹麦FOULUM 农业研究中心试验研究了油菜籽粒含水率对油菜分段收获和联合收获中3种主要损失的影响，建立了含水率与3种主要损失及总损失之间的数学函数，另外秸秆含水率对秸秆收获物流损失的影响也进行了研究。结果表明：随着含水率的降低，脱粒损失和清选损失降低，但是过低的含水量会使割台损失增大。总损失与含水率之间存在CUBIC函数关系且关系显著；不同含水率情况下，分段收获和联合收获籽粒平均损失率分别为16.358%和18.771%，分段收获平均高出联合收获2.4%；在三大损失中割台损失最低值0.976%，平均低于脱粒损失和清选损失；秸秆含水率对秸秆收获物流损失影响不显著。

Effect of moisture content on rape harvest logistics losses under different harvest methods

Rape harvest logistics loss is an important factor in the cost of production, the impact of rapeseed moisture content on the three main losses in single-step harvest and in multi-step harvest was studied in Foulum Research Centre of Denmark, and functions between moisture content and three main losses as well as total loss were established, and the effect of straw moisture content on harvest logistics loss was also investigated. The results show that with the lower moisture content, threshing loss and cleaning loss reduce, but too lower moisture content will increase the cutting header loss. The relationship between the total losses and moisture contents is significantly CUBIC function; In different moisture contents, the average losses of combine harvesting and multi-steps harvesting were respectively 16.358% and 18.771 and the former is less 2.4% than the latter; the minimum value of header loss is 0.976% in the three main losses and the average header loss is lower than the threshing loss and cleaning loss; The effect of straw moisture content on straw harvest logistics loss is not significant.