饲用高粱品种种子萌发期耐盐碱指标筛选及耐盐碱性综合评价

Selection of Salt and Alkali Tolerance Indexes and Comprehensive Evaluation of Salt and Alkali Tolerance of Feed Sorghum Varieties during Seed Germination

为了评价不同饲用高粱品种萌发期耐盐碱指标,筛选适宜西辽河平原盐碱地区种植的饲用高粱品种,采用NaCl、Na_(2)SO_(4)、NaHCO_(3)、Na_(2)CO_(3)按1∶9∶9∶1摩尔比混合,处理浓度为100 mmol/L,混合盐碱模拟盐碱处理,以不加盐碱的蒸馏水为对照,测定发芽指标和根芽长度。采用相关性分析、主成分分析以及隶属函数分析法相结合的方法。结果表明,通过主成分分析,将盐碱处理下饲用高粱萌发期的7个单项指标转换成3个彼此独立综合指标,代表了试验材料92.320%的信息;根据耐盐综合评价值D值得出试验所选11个饲用高粱品种的耐盐碱性,由高到低排序依次为BJ0602、BJ0603、桑根草、牧乐、美国巨人、2180、N5212274、N52K1009、1230、SU9002、1220,发芽率(GR)、根长(RL)和活力指数(VI)是饲用高粱萌发期耐盐碱性评价指标。

In order to evaluate the saline-alkali tolerance index of different forage sorghum varieties during germination,forage sorghum varieties suitable for planting in saline-alkali areas of Xiliaohe Plain were screened.NaCl,Na_(2)SO_(4),NaHCO_(3) and Na_(2)CO_(3) were mixed according to the molar ratio of 1∶9∶9∶1,and the treatment concentration was 100 mmol/L.Mixed saline-alkali simulated saline-alkali treatment was used.The germination index and root bud length were measured with distilled water without saline-alkali as control.We adopted the methods of correlation analysis,correlation analysis,principal component analysis and membership function analysis.The results showed that through principal component analysis,7 single indexes of forage sorghum germination period under saline-alkali treatment were converted into 3 independent comprehensive indexes,representing 92.320%of the information of test materials.According to the comprehensive evaluation value D of salt tolerance,the order of salt tolerance and alkalinity of 11 forage sorghum varieties was BJ0602>BJ0603>Mulberry root grass>Mele>American giant>2180>N5212274>N52K1009>1230>SU9002>1220.Germination rate(GR),root length(RL)and vigor index(VI)were the evaluation indexes of salt and alkaline tolerance of forage sorghum.