不同种植密度及追肥水平对薏苡产量的影响

为探明不同种植密度及追肥水平对薏苡产量的影响,以黔西南州普遍种植的白壳薏苡为材料,设置了追肥水平、窝行距、窝苗数三因素四水平正交试验,结果表明:(1)随着追肥水平的增加,产量随之增加,差异达极显著水平,当追肥增加到一定水平时,产量反而下降;(2)不同窝行距、不同窝苗数差异极显著;(3)A3B2C4处理的表现最好,即行窝距80 cm×80 cm、窝苗数6苗、追尿素20 kg/667 m2,需打1042窝/667 m2,基本苗数6252苗/667 m2。不同种植密度及追肥水平对薏苡的产量影响明显,因此,应合理密植,适量追肥。

Effects of Different Planting Densities and Topdressing Fertilizer Levels on Yield of Coix lacroyma-jobi var. ma-yuen

In order to ascertain the effects of different planting densities and topdressing fertilizer levels on the yield of Coix lacroyma-jobi var.ma-yuen,we carried out the orthogonal experiments with three factors(topdressing fertilizer level,nest row spacing,and seedling number per nest) and four levels,and the white-shell Coix lacroyma-jobi var.ma-yuen which was ordinarily planted in Qianxinan prefecture was taken as the tested material.The results showed that planting density and topdressing fertilizer level had significant effect on the yield of Coix lacroyma-jobi var.ma-yuen.With the increase of topdressing fertilizer level,the yield firstly increased to a significant difference,and then decreased to a certain extent.There were very significant differences in the yield among different levels of nest row spacing and seedling number per nest.The treatment combination of A3B2C4(nest row spacing 80 cm × 80 cm,six seedlings per nest,topdressing urea 20 kg/667 m2) obtained the best yield-increasing effect.