Effects of plant density,pruning way and pollination times on the yields and quality of

F₁ hybrid seeds were studied by orthogonal experiment design of L₉(3⁴),so as to find the optimal

portfolio of tomato(Lycopersicon esculentum Mill.)hybrid seed production techniques under plastic

shed cultivation.The results showed that influencing degree of the three factors on the yields and

quality of tomato seeds were plant density>pollination times>pruning way,and the best combination

could be obtained by density of 3 340 plant per 667 m²,with double-stem pruning and three times

pollination.