不同的育苗方式植棉效益比较研究

在栽培管理水平一致的情况下，调查了不同育苗方式下各处理棉花的生育期、成铃进程、各时期的干物质积累的情况、霜前花率与僵瓣花率、产量、成本与收益的结果。试验结果表明：棉花油后直播比基质育苗的生育期短；各处理的籽棉产量和净产值成正比，其中油后直播5．25万株／hm^2的处理产量与净产值明显高于其他处理。

Comparison of Cotton Planting Benefit among Different Seedling Breeding Manners

Under the same level of cultivation management, the growth period, bell setting process, status of dry matter accumulation in each period, flowering rate and dead bell rate before frost, yield, cost and benefit of cotton under different seedling breeding manners were invested. The results showed that the growth period of cotton that direct sowing after harvested rape was shorter than that of seedling nursery in substrate; the yield of seed cotton was proportional to the net output value under each seedling breeding manners, but the yield and net output value under manner, which direct sowing cotton seedling 52 500 shoots/hm~2 after harvested rape, were obviously higher than that of the other seedling breeding manners.