我省油菜种植面积较大,为了抓住季节适时早栽,特别是三熟(油、稻、稻)油菜早栽,更是夺取高产的重要环节。改革传统的耕作方法,采用免耕法移栽油菜,不仅可以省工省费,而且可在适期范围内提早移栽,提高产量,增加经济效益。我们曾于1954、1955年进行免耕法直播试验,在较大面积上亩产达340多斤。1971年以来,又先后在温江县三圣公社、成都郊区胜利公社继续进行小面积免耕法移栽示范,效果较好。在此基础上,为进一步探索免耕法油菜高产栽培技术,我们于1978年就播栽期和移栽密度等问题作了免耕移栽与整地移栽的比较试验。 Rape planting area in our province larger, in order to seize the season timely early planted, especially three cooked (oil, rice, rice) rapeseed early, it is an important part of the high yield. To reform the traditional farming methods and to use no-till methods to transplanting rape will not only save labor and expenses, but also transplanting earlier within the proper period to increase output and increase economic benefits. In 1954 and 1955, we conducted live-tillage-free tests and weighed more than 340 kilos on a large area. Since 1971, it has successively carried out small-area no-tillage transplanting demonstration in Sanjiang Commune of Wenjiang County and Victory Commune in Chengdu Suburb successively, which has a good effect. On this basis, in order to further explore non-tillage rape high-yielding cultivation techniques, we conducted a comparative experiment on no-tillage transplanting and land preparation transplanting in 1978 on the sowing date and transplanting density.