【摘要】 冻害是紫花苜蓿生产中常见的自然灾害，分析冻害对紫花苜蓿饲草生产指标的影响，对实现其稳产丰产具有重要的指导意义。该文以和田地区洛浦县紫花苜蓿试验田受冻害植株为研究对象，分析冻害对紫花苜蓿株高、分枝数、干重、鲜重及草产量的影响。试验结果表明，试验田受冻害紫花苜蓿植株的比率达39.70%，冻害深度达1.50～9.70 cm；与健康植株相比，受冻害植株的株高、分枝数、干重、鲜重显著降低（P<0.05）；冻害使紫花苜蓿的干草产量降低了19.52%。以上结果表明冻害会降低紫花苜蓿植株的株高、分枝数，引起紫花苜蓿饲草产量下降。更多还原

【Abstract】 Freezing injury is a common natural disaster in alfalfa production.Analyzing the influence of freezing injury on the regeneration of alfalfa has important guiding significance for achieving stable and high yield of alfalfa.In this paper,the incidence of freezing damaged alfalfa plants in experimental field was investigated in Luopu county,Hetian area,and the effects of freezing damage on alfalfa plant height,branch number,dry weight,fresh weight and grass yield were analyzed.The results showed that the proportion of plants damaged by freezing in the experimental field was 39.70%,the depth of freezing damage was 1.50～9.70 cm;Compared with healthy plants,the plant height,branch number,dry weight and fresh weight of freezing damaged plants decreased significantly(P<0.05);Frost damage reduced the hay yield of alfalfa by 19.52%.The above results showed that alfalfa production in Hetian area had the risk of yield reduction caused by freezing injury.更多还原