Abstract:

In order to explore the effects of different fertilization treatments on the biomass and quality of barnyard grass, 4 fertilization treatments were set up (A: organic fertilizers, B: organic fertilizers + inorganic fertilizers, C: inorganic fertilizers, and D: no fertilization) with ‘Zhaomu No.1' as material. After collecting the samples, the biomass of barnyard grass was measured by drying constant weight method. The results showed that the biomass of treatment C was 871 g/m², which was 27.2%, 11.9% and 56.6% higher than that of treatment A, B and D. The crude protein content of treatment C was 10.38%, which was 19.8%, 2.9% and 13.2% higher than that of treatment A, B and D. The crude fat content of treatment B was 1.29%, which was 60.3% less than that of treatment D. The content of acid detergent fiber (ADF) and neutral detergent fiber (NDF) of treatment D were the lowest, 35.11% and 66.11% respectively. Among the 4 fertilization treatments, organic fertilizers + inorganic fertilizers had better comprehensive performance. The results of this study can lay a foundation for formulating proper cultivation techniques for high-yield and high-quality barnyard grass in the black soil area of northeast China.

Key words: annual barnyard grass, NPK combined application, biomass, random block, crude protein, crude fat