生态学杂志2024，Vol.43Issue(9)：2784-2791,8.DOI:10.13292/j.1000-4890.202409.042
辽西半干旱区青贮作物的营养品质及养分利用特征
Nutritional quality and nutrient utilization properties of silage crops in a semiarid area of western Liaoning Province
摘要
Abstract
To investigate nutritional quality and nutrient requirements of silage crops in the semiarid area of western Liaoning Province,a field experiment was carried out with three silage crops including silage corn,sweet sorghum,and Sorghum bicolor xS.sudanense in Fuxin Mongolian Autonomous County,Liaoning Province.Crop yield,nutri-tional quality,feed value,and plant mineral nutrients were determined.The results showed that:(1)Under the same cultivation management conditions,fresh and dry yields of S.bicolor ×S.sudanense were significantly higher than those of silage corn and sweet sorghum,with the highest dry matter yield reaching 34.22 t·hm-2.(2)Silage fermentation increased the contents of crude protein and crude fat in silage crops,while reduced that of crude fiber,neutral detergent fiber,acid detergent fiber and lignin.Silage corn demonstrated superior nutritional quality than sweet sorghum and S.bicolor ×S.sudanense.(3)Silage fermentation enhanced the forage value of silage crops,with silage corn showing significantly higher digestible dry matter,dry matter intake,and relative forage value than sweet sorghum and S.bicolor ×S.sudanense.(4)There were no significant differences in nitrogen(N),phosphor-us(P),and potassium(K)contents of the three silage crops,with N,P,and K requirements being about 200-300,60-90 and 320-580 kg·hm-2,respectively.S.bicolor ×S.sudanense exhibited significantly higher N,P,and K uptake compared to silage corn and sweet sorghum,with a notable demand for K.In conclusion,silage fer-mentation effectively improved nutritional quality of silage crops,and silage corn would be a more suitable silage crop in western Liaoning Province.Our results provide important support for the high-yield cultivation and promotion of silage crops in western Liaoning.关键词
青贮玉米/甜高粱/高丹草/养分特征/秸秆饲料化利用Key words
silage corn/sweet sorghum/Sorghum bicolor ×S.sudanense/nutrient characteristics/straw feed utili-zation引用本文复制引用
井国雁,武辰冉,梁志鹏,王树强,姜东奇,张玉兰,陈振华..辽西半干旱区青贮作物的营养品质及养分利用特征[J].生态学杂志,2024,43(9):2784-2791,8.基金项目
中国科学院战略性先导科技专项(XDA28090200)和辽宁省昌图县黑土地保护科技特派团项目(2023JH5/10400149)资助. （XDA28090200）
