在不同种植密度下双低油菜宁杂11号、宁油16号摘薹试验研究

Study on Tender Shoots Harvest of Double-low Rape Varieties Ningza No.11 and Ningyou No.16 under Different Planting Densities

采用三因素裂区试验设计,研究了种植密度和摘薹对双低油菜宁杂11号、宁油16号的菜薹产量、菜籽产量及净收益等的影响。结果表明:宁杂11号各处理的菜籽产量和净收益均显著高于宁油16号,但菜薹产量略低于宁油16号。随着种植密度提高,宁杂11号的净收益显著增加,但摘薹后净收益增加不大。宁油16号摘薹后净收益大幅度增加。摘薹后油菜生育期推迟、株高降低、总角果数减少、千粒重下降,但角果长度和每角粒数能显著增加。

Through 3-factors split plot experimental design,the effects of planting density and tender shoots harvest on the tender shoot yield,rapeseed yield and net economic benefit of double-low rape varieties Ningza No.11 and Ningyou No.16 were studied.The results showed that the rapeseed yield and net economic benefit of Ningza No.11 in all treatments were obviously higher than those of Ningyou No.16,but the tender shoot yield of the former was slightly lower than that of the latter.The net economic benefit of Ningza No.11 significantly increased with the rising of its planting density,but its tender shoots harvest could increase little net economic benefit.The net economic benefit of Ningyou No.16 could be greatly enhanced by its tender shoots harvest.After harvesting the tender shoots,the growth and development of these two varieties were delayed,and their plant height,total siliques and 1000-grain weight reduced,but their silique length and grains per silique increased significantly.