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I. Purpose of the experiment
    To verify the effect of polyglutamic acid on vegetables through the fertilizer efficiency test on greenhouseedible amaranth plant. To provide a basis for guiding scientific fertilization.
Contents of the experiment
1.To study the effect of polyglutamic acid in edible amaranth plant.
Experimental design
The experiment set up 2 treatments. The base fertilizer was applied uniformly. The fertilizer treatments were as follows:
T1: Control 60kg of basic fertilizer;
T2: base fertilizer 60kg + polyglutamic acid (20g flush);
IV. Experimental implementation
1、Test site: Puhao Ecological Park.
2、Crop for trial: edible amaranth plant
3test plot setting: each treatment plot area of about 120 square meter
4、 fertilization and field management:
The base fertilizer was uniformly spread and tilled, and the treatment started when the seedling height was 5-6cm to flush with water; the management was consistent with the daily management.
V. Results and analysis

edible amaranth plant overall uniform growth, fat foliage, strong plants, few pests and diseases.
 

No 1 2 3 4 5 6 7 8 9 10 average
CK 23.1 24.4 26.8 26.1 24.9 25.3 19.8 21.1 21.6 22.2 23.5
Treat 32.2 30.8 28.5 33.3 24.3 28.1 29.0 27.5 24.8 26.8 25.5
Table 1 Comparison of plant height (cm)
 
No 1 2 3 4 5 6 7 8 9 10 average
CK 0.21 0.23 0.21 0.24 0.22 0.21 0.21 0.23 0.19 0.20 0.21
Treat 0.26 0.24 0.28 0.22 0.24 0.23 0.23 0.26 0.25 0.24 0.24
Table 2 Comparison of blade thickness (mm) 

No 1 2 3 4 5 6 7 8 9 10 average
CK 6.5 7.5 7.1 7.8 8.3 8.5 7.6 7.4 8.6 8.9 7.8
Treat 7.7 9.2 9.9 9.5 8.7 7.9 9.3 9.1 10.1 8.3 8.9


Table 3 Comparison of root length (cm) 
No 1 2 3 4 5 6 7 8 9 10 average
CK 0.29 0.35 0.25 0.13 0.32 0.28 0.29 0.28 0.27 0.21 0.27
Treat 0.32 0.35 0.31 0.29 0.36 0.31 0.40 0.35 0.29 0.28 0.33
Table 4 Comparison of stem thickness (cm)  


No 1 2 3 average increase production%
CK 0.20 0.24 0.23 0.22 -
Treat 0.26 0.27 0.25 0.26 18%
Table 5 Weight of amaranth plant at harvest (kg)  
VI. Conclusion
Liyoung γ-PGA the main effect performance of the flushing fertilizer:
1、Edible amaranth plant plants are high, vigorous and high yield;
2、Edible amaranth plant leaves are fat, thick stems;
3、Edible amaranth plant root system is developed, root more, root long.