scattered planting
1.The research primarily validated the correctness of the formulas of the DPT with scattered-planting in double-season rice.
2.Hereby, the traditional formula about basic population of rice planting was improved and a formula for basic population under scattered-planting with DPT in double-season rice was drawn up. For early rice, it was X=Y/{(1+t_ 1 r_ 1 )1+(N-n-SN)Rr_ 2 +(SN-3-t_ 1 )R_ 2 r_ 5 };
3.Taking the population calculated from the basic seedlings formulas self-drafted of the dry-land seedling-raised on plastic trays (DPT) with scattered-planting in double-season rice as the middling population, one population of the higher and the lower were set respectively, and the yields and yield formations of these different basic populations were compared.
