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Effect of Bacillus Subtilis Protease on Growth, Production Performance and Feed Efficiency of Silkworm, Bombyx Mori L
Zaigui Wang
Anhui Agricultural University
Corresponding Author
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Background:The effects of Bacillus subtilis protease on the silkworm (Bombyxmori L) production performance and feed efficiency were investigated. 2250 silkworms were randomly divided into two groups, the test group and the control group, each group had three replicates. A certain concentration of protease was sprayed to the mulberry leaves of the test group, while equal volume of deionized water was sprayed to the control group. Test diets were fed in three phases: 3rd instar, 4th instar and 5th instar larval stage.
Results: The results demonstrated that: (i) final weight (FW), average daily gain (ADG), average daily feed intake(ADFI), and feed conversion ratio (FCR) in 4th and 5th larval instar, (ii) midgut protease activity, crude protein digestibility (CPD), crude fiber digestibility (CFD) and cocoon shell conversion rate (CSCR) (iii) the total number of bad cocoons,coarse cocoon, average pupa weight (APW), average cocoon shell weight (ACSW) and average cocoon weight (ACW) were extremely significantly higher (P<0.01) in test group as compared to control group. While, (i) the digestibility of crude lipid (EED) and (ii) the fly larvae cocoons in test group were higher significantly (P<0.05) than that of the control group.
Conclusion:These results indicated that the B. subtilis protease could enhance the silkworm growth performance, feed efficiency and the cocoon quality of silkworm.
Keywords
silkworm, protease, growth performance, feed efficiency, cocoon quality
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This is a preprint. It has not completed peer review.
Research
Effect of Bacillus Subtilis Protease on Growth, Production Performance and Feed Efficiency of Silkworm, Bombyx Mori L
Zaigui Wang
Anhui Agricultural University
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 05 Jun, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Animal Science
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background:The effects of Bacillus subtilis protease on the silkworm (Bombyxmori L) production performance and feed efficiency were investigated. 2250 silkworms were randomly divided into two groups, the test group and the control group, each group had three replicates. A certain concentration of protease was sprayed to the mulberry leaves of the test group, while equal volume of deionized water was sprayed to the control group. Test diets were fed in three phases: 3rd instar, 4th instar and 5th instar larval stage.
Results: The results demonstrated that: (i) final weight (FW), average daily gain (ADG), average daily feed intake(ADFI), and feed conversion ratio (FCR) in 4th and 5th larval instar, (ii) midgut protease activity, crude protein digestibility (CPD), crude fiber digestibility (CFD) and cocoon shell conversion rate (CSCR) (iii) the total number of bad cocoons,coarse cocoon, average pupa weight (APW), average cocoon shell weight (ACSW) and average cocoon weight (ACW) were extremely significantly higher (P<0.01) in test group as compared to control group. While, (i) the digestibility of crude lipid (EED) and (ii) the fly larvae cocoons in test group were higher significantly (P<0.05) than that of the control group.
Conclusion:These results indicated that the B. subtilis protease could enhance the silkworm growth performance, feed efficiency and the cocoon quality of silkworm.