Pedosphere 11(1): 63--66, 2001
ISSN 1002-0160/CN 32-1315/P
©2001 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Relationships between sulfur concentration in mulberry Leaves and the quality of silkworm cocoon |
| ZHAO Yan-Wen1, J. D. BEATON2, CAO Zhi-Hong1, A. M. HENDERSON2, HU Zheng-Yi1 and XU Cheng-Kai1 |
1 Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 (China);
2 Fernz SulFer Works Inc., P.O. Box 9, Irricana, Alberta T0M 1B0 (Canada) |
| ABSTRACT |
| S concentrations in samples of mulberry leaves and silkworm (Bombyx mori L.) cocoon shells and quality of cocoon taken from typical mulberry gardens of six provinces located in the lower to middle reaches of the Yangtze River were analyzed by the method of applied biostatistics on sericulture to study the relationships between cocoon quality and S concentrations in mulberry leaves and cocoon shells. The results showed that two-power function relationships between concentration of sulfur in mulberry leaves and characters of cocoon quality were significant (R2 =0.139*~0.329**, n = 24~29, a < 0). The range of optimum S concentrations in mulberry leaves was 1.90~2.49 g kg-1 (mean ± SE = 2.10 ± 0.15 g kg-1) for high quality of cocoon. There existed significant two-power function or positive linear relationships between S concentration in cocoon shell and characters of cocoon quality (R2 =0.153*~0.458**, n = 24~29). The range of optimum concentrations of sulfur in cocoon shell was 1.51~1.61 g kg-1 for high quality of cocoon. |
| Key Words: cocoon quality, mulberry leaves, silkworm cocoon, sulfur |
| Citation: Zhao, Y. W., Beaton, J. D., Cao, Z. H., Henderson, A. M., Hu, Z. Y. and Xu, C. K. 2001. Relationships between sulfur concentration in mulberry Leaves and the quality of silkworm cocoon. Pedosphere. 11(1): 63-66. |
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