黔北地区薏苡高产栽培最佳行窝距及最适播种量探讨

Experiments on the fossa- row- spacing and seeding number of Coix lachryma- jobi L.

以兴仁白壳薏苡(Coix lachryma-jobi L.)为材料,通过随机区组设计,探讨不同种植密度对薏苡产量及构成因子的影响。结果表明,行窝距和播种粒数对产量的影响的主效均达极显著差异水平,二者的互作也达显著差异水平。不同行窝距间的薏苡单产以80×60 cm最高,不同播种粒数间的单产以6粒/窝最高,各处理间单产以行窝距80×80 cm、播种粒数6粒/窝为最高。不同窝行距对株高、株穗数、株粒数、百粒重有明显影响,对窝株数影响不大;不同播种量对株高、株粒数、百粒重、窝株数有影响,对株穗数影响不大。

The effects of different planting densities on the yield and yield component factors of Coix lachryrma-jobi L. are investigated using randomized block design. The results show that fossa-row-spacing and seed number significantly impact on the yield and the interacted influence of these two factors is also signifi-cant. Among the different fossa-row-spacing plantings, 80 × 60 cm spacing produces the highest yield. While 6 seeds/fossa planting produces the highest yield among the different seed numbers. When these two factors are considered together, the combination of 80 × 80 cm with 6 seeds/fossa produce the highest yield a-mong the different combinations. Fossa-row spacing has obvious impact on plant height, panicle number, grain number per plant, 100-grain weight, but has little impact on the fossa-planting number. Different seeding numbers have clear influence on the plant height, grain number per plant, 100 -grain weight and fossa-planting number, but has little impact on the panicle number per plant.