我国地域辽阔,从南到北各种农作物的收获期时差很大,特别是水稻收获时间差更大,跨区机收水稻前景更广阔。那么,哪类联合收割机更适于跨区作业,更受农民欢迎呢?我们认为应优先考虑下述几点。自走式不管是轮式自走式,还是履带自走式,由于其转移快捷,操作方便,便于长途作业,农户更希望用此类机型收割。为此,不少原来生产背负式联合收割机的厂家纷纷转为开发自走式联合收割机。例如,上海向 China has a vast territory. The harvest time of various crops from south to north is very wide. In particular, the difference in harvest time of rice is greater, and the prospects for rice harvesting across regions are broader. So, what type of combine harvester is more suitable for cross-regional operations, more peasants welcome? We think that should give priority to the following points. Whether it is self-propelled wheel self-propelled, or track self-propelled, due to its fast transfer, easy operation, easy to long-distance operation, farmers prefer to use such models harvest. To this end, many of the original manufacturer of knapsack combine harvester have switched to developing self-propelled combine harvesters. For example, Shanghai to