玉米耐盐性的鉴定评价

Identification and Evaluation for Salt Tolerance in Maize

对14个玉米品种的芽期、苗期、全生育期进行耐盐性鉴定,将穗长、穗粗、行粒数、穗行数、秃尖长、百粒质量等性状的T/CK与全生育期耐盐指数(STI)进行相关分析。结果表明,STI与穗长、穗粗、行粒数、百粒质量的T/CK呈正相关,且达显著或极显著水平;STI与秃尖长呈负相关,达到极显著水平。M14(蠡玉37)在3个时期均表现出较高的耐盐性,而且具有良好的生产潜力,在全盐量0.15%～0.25%的盐渍化土壤上具有一定的推广利用价值;M2(浚单20)、M4(京单28)、M9(锐步1号)在芽期耐盐性较差,但苗期和全生育期有较高的耐盐性,因此,在保证发芽的条件下,有一定的推广应用价值。

14 maize cultivars were identified for salt tolerance at the stages of germination,seedling and for whole growth period.The correlation relationships between the index of salt tolerance of yield（STI） and the T/CK of some agronomic traits such as ear length,ear diameter,rows per ear,row grains,barren tip length and 100-seed weight were determined by correlation analysis.The results of this study showed that the T/CK of ear length,ear diameter,row grains and 100-seed weight showed a significantly positive correlation relationship with the STI;however,and the T/CK of barren tip length showed a significantly negative correlation relationship with the STI.M14 appeared in high salt tolerance in all three periods,better agronomic characters and application and extension value in the field with 0.15%~0.25% salinity.The cultivars of M2,M4 and M9 appeared in high salt tolerance at the stage of seedling and in the whole growth period,and have certain application value under the condition of the sprout.