Evaluation of Agronomic Characters and Feeding Potential of a New Perennial Sorghum

doi:10.11924/j.issn.1000-6850.casb2020-0036

Abstract

Abstract:

To understand the feeding potential of a new sorghum material ‘SX-1’, a variety comparison experiment was conducted for 2 years to evaluate the agronomic traits, yield and feed quality of ‘SX-1’ and an annual hybrid (Sorghum bicolor × S. sudanense cv. ‘Jinmu No. 1’). The results showed that the new material ‘SX-1’ is perennial and male-sterile. In the first year of establishment, the plant height (311.33 cm) of ‘SX-1’ was significantly higher (P<0.05) than that of ‘Jinmu No.1’ (263.00 cm), and its number of tillers was 12.00-13.00. The number of tillers in the second year of establishment increased significantly (up to 40). The fresh grass yield (110822.43 kg/hm²) of ‘SX-1’ in the first year of establishment was significantly lower (P<0.05) than that of ‘Jinmu No.1’ (125846.43 kg/hm²); but the hay yield (22300.71 kg/hm²) was significantly higher (P<0.05) than that of ‘Jinmu No. 1’ (19039.32 kg/hm²). In the second year of establishment, the fresh and hay yield of ‘SX-1’ was 150373.33 kg/hm² and 28866.77 kg/hm², respectively, which increased by 35.69% and 29.44% in comparison with the first year of planting, and 10.53% and 38.00% higher than the fresh and hay yield of ‘Jinmu No. 1’. Crude protein, neutral detergent fiber and ether extract content of ‘SX-1’ was 9.98 %, 53.28% and 2.20%, respectively, not significantly (P>0.05) different from those of ‘Jinmu No. 1’ (10.05%, 53.93% and 2.09%); acid detergent fiber (35.25%) was significantly lower than that of (P<0.05) ‘Jinmu No. 1’ (45.20%); crude ash (8.59%) was significantly higher (P<0.05) than that of ‘Jinmu No. 1’ (7.57%); the relative feeding value (107.27) was higher than that of ‘Jinmu No. 1’ (92.61). The new perennial sorghum material ‘SX-1’ has high biomass and feeding potential, and it is worth further development and utilization. The interspecific hybrid of Sorghum bicolor and perennial sorghum could be the breeding direction of forage sorghum.

Key words: sorghum, yield, nutritional quality, density, feeding potential

CLC Number:

S543+.9

Wang Honglin, Zuo Yanchun, Yan Xu, Zhou Xiaokang, Kou Jing, Pu Jun, Zhang Haoren, Du Zhouhe. Evaluation of Agronomic Characters and Feeding Potential of a New Perennial Sorghum[J]. Chinese Agricultural Science Bulletin, 2020, 36(27): 33-40.

Figures/Tables 7

References 27

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材料名称	播种期	出苗期	拔节期	抽雄期	开花期	成熟期	返青期
SX-1	3-27	-	5-4	6-8	6-10	-	3-20
晋牧1号	3-27	4-4	5-2	6-19	6-21	7-15	-

材料名称	播种期	出苗期	拔节期	抽雄期	开花期	成熟期	返青期
SX-1	3-27	-	5-4	6-8	6-10	-	3-20
晋牧1号	3-27	4-4	5-2	6-19	6-21	7-15	-

材料名称	株高/cm	分蘖	茎粗/mm	茎节数	叶片数	单枝茎重/g	单枝叶重/g	糖锤度/%
SX-1	311.33±13.61a	12.00±1.41a	12.35±1.57b	7.00±1.15b	7.20±0.75b	247.50±20.16b	53.75±4.15b	3.46±0.34b
晋牧1号	263.00±14.51b	2.22±1.03b	15.81±1.77a	8.56±1.34a	9.38±0.86a	305.56±39.21a	67.22±10.36a	6.80±1.50a
第2次刈割
SX-1	328.56±18.79a	13.00±2.16a	11.37±0.82b	11.33±1.25a	13.00±1.41a	439.67±38.06a	236.25±21.75a	6.05±1.05a
晋牧1号	205.00±14.14b	1.00±0.26b	12.51±1.33a	8.67±1.25b	8.00±0.82b	378.67±26.29b	87.67±4.87b	6.32±0.26a

材料名称	株高/cm	分蘖	茎粗/mm	茎节数	叶片数	单枝茎重/g	单枝叶重/g	糖锤度/%
SX-1	311.33±13.61a	12.00±1.41a	12.35±1.57b	7.00±1.15b	7.20±0.75b	247.50±20.16b	53.75±4.15b	3.46±0.34b
晋牧1号	263.00±14.51b	2.22±1.03b	15.81±1.77a	8.56±1.34a	9.38±0.86a	305.56±39.21a	67.22±10.36a	6.80±1.50a
第2次刈割
SX-1	328.56±18.79a	13.00±2.16a	11.37±0.82b	11.33±1.25a	13.00±1.41a	439.67±38.06a	236.25±21.75a	6.05±1.05a
晋牧1号	205.00±14.14b	1.00±0.26b	12.51±1.33a	8.67±1.25b	8.00±0.82b	378.67±26.29b	87.67±4.87b	6.32±0.26a

材料名称	刈割次数	鲜草产量/(kg/hm²)	干草产量/(kg/hm²)	单株茎重/g	单株叶重/g	茎叶比
SX-1	1	48600.21±644.25a	9234.24±129.98b	927.50±14.80b	234.17±11.57b	3.96±0.34a
	2	62222.22±723.35a	13066.67±170.53a	1221.83±25.82a	435.67±10.91a	2.80±0.21b
	均值	55411.22±683.80a	11150.35±.150.26a	1074.67±20.31a	334.92±11.24a	3.38±0.28b
	总产	110822.43±624.06b	22300.71±163.12a
晋牧1号	1	52146.24±558.21a	9386.32±297.06a	305.56±19.21b	67.22±4.36b	4.55±0.31a
	2	40388.53±621.22b	5654.39±163.89b	378.67±16.29a	87.67±4.87a	4.32±0.11a
	3	33321.66±589.72c	3998.60±230.48c	318.75±11.56b	66.25±7.86b	3.85±0.35c
	平均	41952.14±589.71b	6346.44±230.48b	334.33±15.69b	73.71±5.70b	4.24±0.26a
	总产	125846.43±433.26a	19039.32±171.34b