Study on Feeding Quality Characteristics of Straw of Different Fresh Corn Varieties in Cold and Arid Regions of Northwest Hebei Province
In order to select high-yield and high-quality fresh corn varieties suitable for feeding and planting in the cold and arid areas of northwest Hebei,the nutritional quality,roughage quality and yield of straw after harvesting of 13 fresh corn varieties were studied,and their feeding quality was comprehensively evaluated using cluster analysis method.The results showed that the neutral detergent fiber(NDF)content of straw from different fresh corn varieties ranged from 36.22%to 53.68%,acid detergent fiber(ADF)content ranged from 23.19%to 30.73%,crude protein(CP)content ranged from 6.29%to 8.96%,starch(ST)content ranged from 12.23%to 43.28%,crude ash(CA)content ranged from 8.26%to 10.31%,and crude fat(CF)content ranged from 0.81%to 1.51%;The relative feed value(RFV)of straw roughage ranged from 113.78%to 179.60%,and the grading index(GI)of roughage quality ranged from 6.83 to 21.32 MJ;When harvested,the number of green leaves per plant ranged from 9.33 to 15.33,the fresh straw yield ranged from 19.20 to 64.47 t/ha,and the dry straw yield ranged from 4.04 to 12.47 t/ha.Cluster analysis was conducted on 12 indicators of straw nutritional quality,roughage quality and yield traits.With a Euclidean distance of about 11,13 varieties were divided into 4 categories.Among them,WCN6 and WXN2000 had higher CP,ST and CF contents in straw after harvesting,with averages of 8.91%,40.12%and 1.49%,respectively;The contents of fiber substances such as NDF and ADF that affect animal feeding were relatively lower,with averages of 36.75%and 23.77%,respectively;The CA content was relatively lower,with an average of 8.33%;RFV belonged to special grade,and GI belonged to grade 2;The yields of fresh and dry straw were relatively higher,with averages of 53.00 t/ha and 10.63 t/ha,respectively.In summary,WCN6 and WXN2000 have higher comprehensive feeding value of straw after harvesting,suitable for promoting and planting as high-quality varieties for both food and feed in the northwest region of Hebei Province.
Fresh cornFeeding qualityVariety screeningNorthwest Hebei region
万方数据
维普
