Abstract:

To increase the yield of coix (Coix lachryrma-jobi L.) in the northern region and provide a scientific basis for genetic breeding. Effects of different planting densities and planting date on yield and its components in coix were studies using two-factor randomized block design. The results showed that the difference of yield and its components affected by plant densities and planting dates were both significantly. The optimum combinations comprised 60cm×80cm spacing-row, seeding around April 27, with respects to increasing economic benefits of coix. Properly early seeding and sparse planting density could increase the yield and economic benefits significantly. Seed number per plant and 100-seed weight should be regarded as the most important indexes for yield improvement, followed by tiller number and seed setting rate.