不同播种密度对芜菁块根性状及产量的影响

Effects of Different Seeding Densities on Tuberous Root Traits and Yield of Brassica rapa L.

为了解决藏区芜菁种植密度不均匀、块根大小不一致、产量低,无法满足加工企业对优质原料的需求问题,以对本地芜菁品种提纯后的新品种为材料,研究了川西藏区不同播种密度(株行距20 cm×30 cm、25 cm×30 cm、30 cm×30 cm和35 cm×30 cm)对芜菁块根性状及产量的影响。结果表明:各处理芜菁块根横切面直径和单株块根质量间差异均达极显著水平,大小顺序均为株行距35 cm×30 cm>30 cm×30 cm>25 cm×30 cm>20 cm×30 cm;各处理芜菁产量间差异也达极显著水平,大小顺序为株行距30 cm×30 cm>35 cm×30 cm>20 cm×30 cm>25 cm×30 cm。结合芜菁植株性状、产量及芜菁深加工企业对优质原材料的要求,得出川西藏区芜菁栽培的最佳株行距为30 cm×30 cm;如产品用作饲料,则采用株行距35 cm×30 cm和30 cm×30 cm这2种密度均可。

In order to solve the problems of uneven planting density,different root sizes and low yield of Brassica rapa L.in Tibetan areas,which could not meet the demand of high quality raw materials for processing enterprises,the effects of different planting densities(plant-row spacing such as 20 cm×30 cm,25 cm×30 cm,30 cm×30 cm and 35 cm×30 cm)on tuberous root traits and yield of B.rapa L.in Tibetan areas of western Sichuan were studied with the new cultivars purified from local cultivar of B.rapa L..The results showed that there were extremely significant differences in tuberous root diameter and weight per plant among different treatments,and the order of plant-row spacing was 35 cm×30 cm>30 cm×30 cm>25 cm×30 cm>20 cm×30 cm.The yield differences of B.rapa L.among different treatments was extremely significant,and the order of plant-row spacing was 30 cm×30 cm>35 cm×30 cm>20 cm×30 cm>25 cm×30 cm.According to the plant traits and yield of B.rapa L.and the requirements of high quality raw materials for deep processing enterprises,the optimal plant-row spacing for B.rapa L.cultivation was 30 cm×30 cm in Tibetan areas of western Sichuan.When the product was used as feed,plant-row spacing of 35 cm×30 cm and 30 cm×30 cm were acceptable.