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以3种基因型(耐寒型、中间型和敏感型)共10份花生种子为材料,于6个浓度梯度的过磷酸钙溶液(0浓度为对照)浸泡进行发芽试验,以露白率,发芽率及相对发芽率为指标,研究了在常温(25℃)浸种与低温(2℃)浸种下不同基因型花生种质发芽能力。结果表明:在种子吸胀萌发期,25℃/72h平均露白率由高到低为P2>P3>P4>P1>P5>P0;2℃/72h平均露白率由高到低P4>P2>P5>P3>P1>P0,无论常温浸种还是低温浸种,72h露白率都高于对照水平。3种基因型的10份花生种质25℃/120h发芽率明显高于2℃/120h发芽率,经低温处理后,耐寒型种质(S8,B1,Y4)和中间型种质(E4,Q2)发芽率高于中间型种质(H56)和敏感型种质(H33,J11,J19,J4),且敏感型种质随磷浓度的增高种子的发芽率随之增高。通过露白率与发芽率的相关性分析发现,针对不同基因型可以增施不同浓度的磷肥来提高花生种子发芽期的耐寒能力,耐寒型种质以P3最明显,中间型种质以P2最明显,敏感型种质以P5最明显。
Ten peanut seeds of three genotypes (cold-tolerant, intermediate and sensitive) were used to germinate in six concentrations of superphosphate solution (concentration 0) And relative germination rate as indicators, the germination ability of different genotypes of peanut germplasm was studied under soaking (25 ℃) and low temperature (2 ℃). The results showed that the mean dew whitening rate at 25 ℃ / 72h was P2> P3> P4> P1> P5> P0 at 25 ℃ / 72h, while the average dew whitening rate at 2 ℃ / 72h was from high to low at P4> P2> P5 > P3> P1> P0. The soaking rate of 72h was higher than that of the control at either normal temperature or soaking in low temperature. The germination rate of 10 peanut germplasm at 25 ℃ / 120h was significantly higher than that at 2 ℃ / 120h in the three genotypes. After low temperature treatment, the cold tolerant germplasm (S8, B1, Y4) and the intermediate germplasm (E4, Q2) germination rate was higher than that of intermediate type (H56) and sensitive type (H33, J11, J19, J4), and the germination rate of sensitive type germplasm increased with increasing phosphorus concentration. According to the correlation analysis between the dew rate and the germination rate, different concentrations of phosphate fertilizer could be applied to improve the cold tolerance of peanut seeds during germination. The most obvious cold-tolerant germplasm was P3, and the middle type germplasm was the most obvious , Sensitive germplasm P5 most obvious.