不同饲用高粱品种在榆林风沙草滩区的生产性能及营养品质综合评价

Comprehensive evaluation on production performance and nutritional quality of different forage sorghum varieties in the wind-sand grassy flat area of Yulin

为筛选出适宜榆林风沙草滩区膜际栽培的高产优质饲用高粱品种,采用随机区组试验,设置海狮(G1)、F1497(G2)、润宝(G3)、大奖1180(G4)、陇草一号(G5)、晋甜杂3号(G6)、晋牧1号(G7)7个处理,每个处理3次重复。分析不同饲用高粱品种的农艺性状、草产量、水分利用效率、营养品质,并进行灰色关联度评价。结果显示:G1株高(350.83 cm)显著低于G2(382.90 cm)(P<0.05),但高于其他处理;G1茎粗(24.25 mm)高于其他处理。G1鲜草产量(58.77 t/hm^(2))显著低于G4(P<0.05),但显著高于除G3外的其他处理(P<0.05);G1干草产量(21.32 t/hm^(2))高于其他处理。G1水分利用效率[22.14(kg/hm^(2))/mm]高于其他处理。G1粗蛋白含量(4.10%)显著低于G5(P<0.05);G1糖锤度(17.48%)只低于G6;G1相对饲喂价值(178.19)高于G2、G3、G4。灰色关联度评价中G1关联度排序第一。研究表明,适宜榆林风沙草滩区膜际栽培的高产优质饲用高粱品种为海狮。

To screen for high-yielding and high-quality forage sorghum varieties suitable for inter-membrane cultivation in the Yulin wind-sand grassland area,a randomized block experiment was conducted with seven varieties:Haishi(G1),F1497(G2),Runbao(G3),Dajiang 1180(G4),Longcao No.1(G5),Jintianza No.3(G6),and Jinmu No.1(G7),with three replicates for each treatment.The agronomic traits,grass yield,water use efficiency,and nutritional quality of different forage sorghum varieties for fodder were analyzed,and a grey relational evaluation was performed.The results showed that the plant height(350.83 cm)of G1 was significantly lower than G2(382.90 cm)(P<0.05),but higher than the other treatments.Stem thickness(24.25 mm)of G1 was higher than the other treatments.Fresh grass yield(58.77 t/hm^(2))of G1 was significantly lower than G4(P<0.05),but significantly higher than the other treatments except for G3(P<0.05).Dry grass yield(21.32 t/hm^(2))of G1 was higher than the other treatments.Water use efficiency[22.14(kg/hm^(2))/mm)]of G1 was higher than the other treatments.Crude protein content(4.10%)of G1 was significantly lower than G5(P<0.05).Sugar hammer degree(17.48%)of G1 was only lower than G6.Relative feeding value(178.19)of G1 was higher than G2,G3,and G4.In the grey relational evaluation,G1 ranked first in the degree of association.The study indicates that the highyielding and high-quality forage sorghum variety suitable for inter-membrane cultivation in the Yulin wind-sand grassland area is G1.