多分枝甘蓝型油菜超稀植高产栽培初报

Preliminary study on superior thin planting of multi-branched rapeseed

研究多分枝甘蓝型油菜(Brassica napus L.)品系YF368-2栽培密度对产量、分枝数影响的规律,以期获得该油菜的高产栽培模式。结果表明,在栽培密度8 820～79 410株/hm^2范围内,一次有效分枝数随着栽培密度的增加依次降低,产量则随着密度的增加表现为先增加后下降,再增加。在中上等肥力稻茬田,采用8月底9月初育苗,四叶期喷施15%多效唑可湿性粉剂(50 g对水50 kg),10月上旬移栽,移栽密度以48 030株/hm^2左右为宜,产量可达4 350 kg/hm^2,能够达到或超过传统高产栽培技术的产量水平,且具有省种、省工、省时、高效等优点。

In order to obtain the high-yielding cultivation model of the multi-branched rapeseed(Brassica napus L.)line YF368-2,it was studied that the effect of planting density of the line on yield and number of branches.Within the range of density of 8 820~79 410 plants/hm^2,the number of primary effective branches decreased successively with the increase of density,while the yield increased first,then decreased,then increased.Results show that in the higher fertility rice stubble field yield can be up to 4 350 kg/hm^2 that can reach or exceed the traditional high yield cultivation model by means of seedling in late August and early September,spraying 15%paclobutrazol(50 g to water 50 kg)during the four-leaf phase,transplanting in early October and transplanting density with around 48 030 plants/hm^2 This model is not only high yield but also seed-saving,labor-saving,time-saving and high efficiency etc.