不同环境因素对猪殃殃种子萌发及出苗的影响

为探讨猪殃殃种子萌发的适宜环境条件,通过室内萌发试验研究了温度、光照、pH、水势、盐分对猪殃殃种子萌发以及埋土深度对其出苗的影响。结果表明,猪殃殃种子萌发的适宜环境条件为温度10~20℃、光暗12h交替培养以及pH 4~10,萌发率可达到50%以上。猪殃殃种子对水势比较敏感,萌发率随着水势的降低而降低,当水势为0时,萌发率为50.50%,水势降低至-0.6 MPa时,仅有个别种子萌发,萌发率为3.50%,当水势为-0.7 MPa时,种子萌发完全受到抑制;猪殃殃种子对盐分胁迫有一定忍耐力,当NaCl浓度为0.16mol/L时,仍有少数种子萌发,萌发率为16.50%;适于猪殃殃种子出苗的埋土深度是1~2cm,出苗率达到49.50%。研究结果为猪殃殃的出苗调控和综合治理提供了依据。

Effects of different environmental factors on seed germination and seedling emergence of Galium aparine var. tenerum

In order to ascertain the suitable environmental factors for seed germination of Galium aparine var.tenerum,experiments were conducted to evaluate the effects of temperature,light,pH,osmotic stress,salt stress on seed germination and seed burial depth on seedling emergence.The results showed that the suitable environmental factors for germination was 10-20℃,with alternating light-dark period of 12 h/12 h and pH ranging from 4 to 10,and the germination rate was above 50％.The seeds could tolerate a wide range of salt stress,and germination occurred even at 0.16 mol/L (16.5％).However,the seed was highly sensitive to water stress and could not germinate at-0.7 MPa;while the water stress decreased to-0.6 MPa,the germination rate was only 3.50％.The suitable soil depth for seedling emergence was 1-2 cm,with a germination rate of 49.50％.These results provide guidance for regulation of seedling emergence and integrated management of G.aparine var.tenerum.