种子与硼肥同播对直播油菜生长及产量的影响

Effect of Co-sowing of Seeds and Boron Fertilizer on Growth and Yield of Direct Seeding Rapeseed

在衡阳地区3个不同的试验地点开展了油菜种子与硼肥同播试验,研究不同硼肥施用量(0、4.5、9.0、13.5 kg/hm^(2))对油菜生长及产量的影响。结果表明,施用适量的硼肥有利于促进直播油菜出苗与成苗,播种后31 d施硼量13.5 kg/hm^(2)处理成苗数最多,收获前施硼量9.0 kg/hm^(2)处理有效株数最多。施用硼肥后油菜一级分枝数、单株角果数和每角粒数随着硼肥用量的增加呈先升后降的趋势,在施硼量为9.0 kg/hm^(2)时油菜产量达到最高。生产上推荐硼肥施用量为9.0 kg/hm^(2),但在土壤极度缺硼时,也可以施硼量13.5 kg/hm^(2)作为推荐用量。

The experiments of co-sowing of rapeseed seeds and boron fertilizer were conducted at three different experimental locations in Hengyang area to study the effects of different boron fertilizer application rates(0,4.5,9.0,13.5 kg/hm^(2))on the growth and yield of rapeseed.The results showed that applying an appropriate amount of boron fertilizer was beneficial to promoting the emergence and seedling formation of direct seeding rapeseed.The treatment with the boron application rate of 13.5 kg/hm^(2) on the 31st day after sowing had the highest number of seedlings,while the treatment with the boron application rate of 9.0 kg/hm^(2) before harvest had the highest number of effective plants.After applying boron fertilizer,the primary branch number,pod number per plant,and grain number per pod of rapeseed showed a trend of first increasing and then decreasing with the increase of boron fertilizer application rate.The rapeseed yield was the highest at the boron application rate of 9.0 kg/hm^(2).The recommended boron fertilizer rate in production is 9.0 kg/hm^(2),but when the soil boron is extremely deficient,the recommended boron fertilizer rate may be 13.5 kg/hm^(2).