一、前言我省用康拜因收获小麦时普遍出现大量断穗头的现象,其含量一般在4—10%,较多时达16—20%;在个别情况下达27—32%。凡是难脱的品种,如收获过晚过干,喂入量过大时均会出现较多的断穗。作业中为了加大筛子的通过能力,以便减轻搅龙和脱粒滚筒的负荷提高机器的生产率,但粮食中的断穗因而也就增多了。 I. Preface It is common to find that a large number of spikes are broken when harvesting wheat from Kangbai County in our province. The content is generally 4-10%, more often 16-20%, and in some cases 27-32%. Those who are hard to break the species, such as too late to harvest too late, when the feed is too large there will be more broken ears. In order to increase the capacity of the sieve to reduce the load on the auger and the barrel, the productivity of the machine is increased. However, the number of ears in the grain is also increased.