Research on the Influence of Montanic Fragmental Farmland on the Work Efficiency of Rice Harvester

Southern hills and mountains area is an important rice production region in China, but fragmental farmlands are not conducive to mechanized operations, and seriously affect the work efficiency of harvester, thereby hinder the overall development of rice mechanization. Although this problem has caused widespread concerns of many scholars, there are little quantitative researches on the relationship between the efficiency of harvester and the fragmentation degree of farmland. By the field experiment,we measured the changes of work efficiency of different aspects in the arable land of different sizes, including pure harvesting, turning etc.. The results showed that the montanic fragmental farmlands mainly influenced the turning efficiency of harvester, when the area was less than 267m2, the harvesting and turn-around time of harvester in unit area both came to 12 min/667m2, While the area was larger than 267m2, harvesting time was 9 min/667m2,but turn-around time was only 7min/667m2. Fragmental farmland has a greater influence on the turning efficiency of rice harvester. Therefore, we must optimize the cornering system of harvester and improve its cornering operation performance to better adapt it to the montanic fragmental farmland, then to promote the development of rice mechanization of the southern hills and mountains area.