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以“莱农5号”洋葱为试材,于11月28日栽植洋葱鳞茎,设每667m2栽植3 700株(T1)、4 400株(T2)、5 000株(T3)、6 000株(T4)4种栽植密度处理,探讨不同栽植密度对洋葱种株生长及种子产量和质量的影响。结果表明:在种株营养生长、生殖生长、种子质量的测定指标中,T1、T2、T3各指标差异不明显,T4各指标与T1、T2、T3差异显著,发病率较高;在种子产量方面,T3产量较高,分别比T1、T2、T4增产23.03%、14.41%、50.28%。因此,晚栽的洋葱鳞茎栽植密度以T3处理,即每667m2栽植5 000株为宜,栽植密度过大、过小都达不到产量高、品质好的目的。
The onion bulbs were planted on “Sunong No.5” onion on November 28, and 3 700 (T1), 4 400 (T2), 5000 (T3) and 6 000 (T4) four planting density treatment to explore the different planting density on the growth of onion species and seed yield and quality. The results showed that there was no significant difference in the indexes of T1, T2 and T3 in the indexes of vegetative growth, reproductive growth and seed quality of seedlings, but there was significant difference between T4 indexes and T1, T2 and T3, In terms of T3, the yield of T3 was higher, which increased 23.03%, 14.41% and 50.28% respectively than T1, T2 and T4. Therefore, late planting onion bulb planting density to T3 treatment, that is, planting 5 000 plants per 667 m2 is appropriate, planting density is too large, too small can not achieve high yield, good quality purposes.