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The effect of biogas slurry application on biomass production and the silage quality of corn |
Hua Sun1,a 
, Kai Shi1,a,*
, Hairong Ding1
, Chenglong Ding2, Zhiqing Yang1
, Chen An1
, Chongfu Jin1
, Beiyi Liu2
, Zhaoxin Zhong1
, Xia Xiao1
, Fuyin Hou1
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1Jiangsu Coastal Area Institute of Agricultural Science, Yancheng 224000, China
2Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China |
Correspondence:
Kai Shi, Tel: +86-0514-88222021, Fax: +86-0514-88222021, Email: dinghair88@163.com
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Received: 6 April 2023 • Revised: 22 May 2023 • Accepted: 19 July 2023
aThese authors contributed equally to this work. |
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| Abstract |
Objective
The objective of this study was to evaluate the effect of biogas slurry application on biomass production and the silage quality of corn.
Methods
A field experiment was conducted in which corn was grown using different biogas slurry application rates. The effect of 25% to 500% biogas slurry nitrogen replacement (T1 to T14) on the yield and quality indices of corn were studied by field plot experiments.
Results
The results revealed that biogas slurry application improved the stem diameter and relative feed value of corn silage in treatments T13 and T11. Moreover, the fermentation quality of corn silage was improved due to an increase in lactic acid content; in comparison with the chemical synthetic fertilizer (CF) group. The crude protein contents of corn silage had no obvious change with increasing biogas slurry application. However, the forage quality index of acid detergent fiber was decreased (p<0.05) in the T11 group compared with the CF group. In addition, higher (p<0.05) 30 h in vitro dry matter digestibility and 30 h in vitro neutral detergent fiber digestibility were observed in the T11 and T13 groups than in the CF group.
Conclusion
Based on these results, it was concluded that the optimum biogas slurry application rate for corn was approximately 350% to 450% biogas slurry nitrogen replacement under the present experimental conditions. |
| Keywords:
Biogas Slurry; Biomass Yield; Corn Silage; Fermentation Quality; Forage Quality |
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