种子大小对旱地小麦种子萌发、幼苗特性和抗旱性的影响

黄明, 付鑫鑫, 张振旺, 张军, 李友军

Effects of Seed Sizes on Seed Germination, Seedling Characteristics and Drought Resistance of Dryland Wheat

Huang Ming, Fu Xinxin, Zhang Zhenwang, Zhang Jun, Li Youjun

表3 种子大小对小麦萌发期和幼苗期抗旱系数和综合抗旱系数的影响

Table 3 Effects of seed size on drought resistance coefficient and comprehensive drought resistance coefficient in wheat during the germination and seedling stages

指标Index 洛旱6号 Luohan 6 洛旱22 Luohan 22 Ⅰ Ⅱ Ⅲ Ⅰ Ⅱ Ⅲ 发芽率Germination rate 0.63 0.60 0.75 0.67 0.51 0.54 发芽势Germination energy 0.37 0.34 0.58 0.65 0.53 0.60 根系活力Root activity 1.25 1.18 1.20 1.45 1.43 1.12 总根长度Total root length 0.60 0.57 0.50 0.71 0.60 0.65 总根表面积 Total root surface area 0.74 0.68 0.63 0.88 0.61 0.78 根直径Root diameter 0.33 0.30 0.27 0.31 0.28 0.30 总根体积Total root volume 0.25 0.21 0.15 0.28 0.18 0.13 总根尖数Total root tips 0.63 0.66 0.66 0.66 0.58 0.51 根分枝数 Number of root branches 0.67 0.59 0.52 0.69 0.72 0.80 SOD活性SOD activity 0.69 0.83 0.73 0.79 0.58 0.69 CAT活性CAT activity 0.40 0.44 0.55 0.46 0.41 0.52 MDA含量MDA content 1.31 1.48 1.30 1.46 1.46 1.44 SS含量SS content 0.44 0.38 0.44 0.52 0.52 0.61 Pro含量Pro content 3.20 2.77 2.97 5.27 4.07 3.88 综合抗旱系数 Comprehensive drought resistance coefficient 11.51 11.02 11.24 14.80 12.47 12.57