播期、密度及肥料运筹对青稞秸秆产量与品质的影响

Effects of sowing date, seeding density and fertilizer management on straw yield and quality of highland barley

以13个来自西藏不同生态区的青稞品种为材料,研究播期、密度、肥料运筹及其互作对青稞秸秆产量与品质的影响。结果表明:参试青稞品种的秸秆产量与品质性状在品种间、播期间、密度间及肥料运筹间均存在显著或极显著的差异。晚播青稞秸秆产量显著低于早播,但秸秆品质显著优于早播。密度和肥料运筹对参试品种秸秆产量影响不显著,但对秸秆品质性状产生显著或极显著影响。品种13-5171-7秸秆平均产量(24 722.35 kg·hm^(-2))和相对饲喂价值(91.19)在各参试品种均居第1位。主成分分析表明,不同处理组合的参试品种综合评价前20中,13-5171-7出现频次最多,部分处理组合排名也靠前,其中A2B2C3处理(A2.2019年1月19日,B2.300万株·hm^(-2), C3.基肥+孕穗肥)综合排名第3,可作为优质粮饲兼用品种在青稞生产中推广种植。

In order to study the effects of sowing date, density, fertilizer management and their interaction on the straw yield and quality of highland barley, 13 varieties from different ecological regions of Tibet were used. The results showed that there were significant or extremely significant differences in straw yield and quality among varieties, sowing period, density and fertilizer management. The straw yield of late sowing was significantly lower than that of early sowing, but its quality was significantly better than that of early sowing. Density and fertilizer management had no significant effect on straw yield, but had opposite effect on straw quality. The average straw yield and relative feeding value of 13-5171-7 ranked the first among tested varieties. Principal component analysis showed that 13-5171-7 appeared the most frequently in the top 20 different treatment combinations. Among them, the A2 B2 C3 treatment of 13-5171-7 ranked the third. 13-5171-7 could be used as a high-quality grain and feed variety on highland barley production.