7种禾本科牧草在榆中县的适应性评价

Adaptability Evaluation of Introduced Seven Forage Sorghums in Yuzhong

摘要: 为筛选出适宜榆中县种植的牧草新品种，对7种禾本科牧草进行了田间种植比较试验，分别对各种牧草株高、产量、分蘖数、叶片数和叶片面积、株径等测定指标进行单因素方差分析和灰色关联分析，综合评价其生产性能和适应性。结果表明，产量最高的为日本饲用高粱，达118 t∙hm⁻²，其次是高丹草286和饲用高粱，早熟高丹草产量最低，为69.5 t∙hm⁻²；灰色关联度综合评价中，日本饲用高粱适应性最强，其次为饲用高粱和高丹草286。这些研究结果可为牧草的科学推广提供理论依据。

Abstract: In order to select the suitable forage sorghums varieties in Yuzhong, the field comparative study on 7 varieties of forage sorghums was carried out. The plant height, fresh yield, tiller number, number and area of leaf, plant diam for different varieties of forage grasses were measured and analyzed using one-way analysis of variance and grey correlative analysis to comprehensively evaluate their production performance and adaptability. The results showed that the yield of forage sorghum from Japan was higher than other varieties, which was 118 t∙hm⁻²; the second were sorghum vulgare × S. Sudanese 286 and sorghum vulgare; the lowest yield was precocity sorghum vulgare × S. sudanese, which was 69.5 t∙hm⁻². Forage sorghum from Japan had the best adaptability, and followed by sorghum vulgare and sorghum vulgare × S. Sudanese 286. This may be greatly helpful to these sorghums’ scientific utilization.