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Protein and fiber profiles of cottonseed from upland cotton with different fertilizations

Zhongqi He, Hailin Zhang, Daniel C. Olk, Mark Shankle, Thomas R. Way, Haile Tewolde
Modern Applied Science 2014 v.8 no.4 pp. 97-105
Gossypium hirsutum, acid detergent fiber, cottonseed, cover crops, crude protein, detergents, dietary fiber, digestibility, lignin, mineral fertilizers, neutral detergent fiber, nutritive value, planting, poultry manure, seeds, wheat
Whole cottonseed and its derived products can be used as human food, animal feed, and industrial raw material. Chemical composition of cottonseed is one of the critical parameters for evaluating its quality and potential end use. Especially, protein and dietary fibers are two desirable nutritional properties of cottonseed. In this study, we determined their contents in cottonseed harvested from different fertilization managements with or without wheat cover crop in two consecutive years. Seed content of crude protein increased in the order of no fertilizer ≤ poultry litter ≤ chemical fertilizer. Both neutral and acid detergent fiber profiles were affected by fertilization and planting year/cover crop in an order reversing that of crude protein. Few statistically significant (P>0.05) impacts were observed on the content of acid detergent lignin. Observations derived from this work will provide information on nutritional value and digestibility of cottonseed as affected by cropping management practices.