Effects of Mixed Agro-Residues (Corn Crop Waste) on Lignin-Degrading Enzyme Activities, Growth, and Quality of Lentinula edodes

Summary

This research explored using corn crop waste to grow shiitake mushrooms instead of traditional sawdust methods. The study found that mixing corn cobs and corn straw with sawdust can produce high-quality mushrooms while helping reduce agricultural waste. Impact on everyday life: – Provides a sustainable way to use agricultural waste that would otherwise be burned or left to rot – Helps reduce production costs for mushroom growers, potentially leading to more affordable mushrooms – Offers an environmentally friendly alternative to traditional cultivation methods – Demonstrates that mushrooms grown on agricultural waste maintain their nutritional value – Could help reduce air pollution from burning agricultural waste in fields

Background

Using agricultural residues to produce mushrooms is an important component of eco-agriculture. In China, agro-residues are often abandoned to decay in fields or burned, causing air pollution. Corn crop waste (CCW), like other lignocellulose materials, can be excellent substrates for growing white-rot fungi. With timber being strictly controlled in China, there is an urgent need to find alternative substrates for mushroom cultivation.

Objective

To evaluate the effects of different mixed corn crop waste (corn cob and corn straw) substrates on enzyme activities, growth characteristics, and nutritional quality of Lentinula edodes (shiitake mushroom) compared to traditional sawdust cultivation.

Results

The T6 formula (40% corn cob, 10% corn straw, 30% sawdust) showed 8.82% higher biological efficiency than the control. Laccase activity was highest in T1 formula during colonization. Mushrooms grown on formulas with more corn cob and sawdust showed better hardness. Nutritional analysis showed CCW formulas produced mushrooms with comparable or better nutrient contents than traditional sawdust substrate.

Conclusion

Mixed corn crop waste formulas, particularly T6 with higher corn cob content, can effectively replace traditional sawdust substrate for L. edodes cultivation. While excessive straw content reduced yields due to low C/N ratios, balanced CCW formulas showed advantages in texture, nutrition, and yields compared to traditional methods.
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