Abstract:

To evaluate the yield and nutritional value of vegetable soybean by-products, this experiment used the vegetable soybean variety Zhexian 9 as material. The above-ground parts of the plant were separated and weighed, and the main nutritional components of the straw and pod hulls were determined to comprehensively assess their feeding value. The results showed that the proportions of straw, pod hulls, and grains of Zhexian 9 accounted for 32.40%, 34.38%, and 33.22% of the whole plant mass, respectively. The contents of moisture, crude protein, crude fat, acid detergent fiber, neutral detergent fiber, crude ash, calcium, and total phosphorus in the straw were 73.06%, 12.33%, 2.19%, 38.30%, 46.60%, 9.30%, 2.63%, and 0.19%, respectively. The corresponding components in the pod hulls were 80.49%, 8.82%, 1.08%, 40.30%, 52.40%, 6.20%, 0.60%, and 0.18%, respectively. Overall, the nutritional value of the straw was higher than that of the pod hulls, particularly in terms of calcium content. This study provides a basis for estimating the yield of vegetable soybean by-products and evaluating their feeding value.

Key words: vegetable soybean, by-products, straw, pod hull, feed value