Effects of Sowing Density and Nitrogen Application Rate on Agronomic Traits and Economic Benefits of Baopimai No.28
ZHAO Jiatao
LIU Mengdao
FU Zhengbo
SUN Lijuan
Abstract：In order to explore the optimum sowing density and nitrogen application rate of the barley variety 'Baopimai No.28',and provide scientific basis for widespread demonstration and promotion.The effects of sowing density(basic seedlings of 1.8×106,2.4× 106 and 3×106 plants/hm2)and nitrogen application rate(450,525 and 600 kg/hm2 urea)on barley grain yield were studied.The results showed that the effective panicles increased with the increase of density and nitrogen application rate.The number of filled grains per spike in low and medium density treatments(1.8×106 and 2.4×106 plants/hm2)increased with the increase of nitrogen application rate,and the number of filled grains per spike in high density treatment(3 × 106 plants/hm2)increased first and then decreased with the increase of nitrogen application rate.The 1 000-grain weight decreased with the increase of nitrogen application rate and density.The yield increased with the increase of nitrogen application rate and density.The three treatments of 600 kg/hm2 urea had higher economic benefits.The optimum basic seedling of Baopimai No.28 was 2.4 × 106 plants/hm2,and the optimum nitrogen application rate was 600 kg/hm2 urea.
Keywords：BarleyDensityNitrogen application rateYieldEconomic benefit
Publication Date：2025-04-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 27-31 )