不同基质配比下米老排组培苗移植效果

为探讨基质配比对组培苗移植效果的影响,以黄心土和泥炭土为基质,按照体积比设置5种基质配比处理,即T₁（100%黄心土）、T₂（80%黄心土+20%泥炭土）、T₃（60%黄心土+40%泥炭土）、T₄（40%黄心土+60%泥炭土）和T₅（20%黄心土+80%泥炭土）,分析不同基质处理对米老排组培苗移植成活率、生长量和苗木质量指数的影响效应。结果表明：T₁和T₃处理有利于提高米老排组培苗移植后成活率,移植1个月的苗木成活率以T₁最高（83.33%）,T₃次之（81.11%）;随着泥炭土比例的增加,米老排组培苗的株高、叶片数、地径均呈先增加后降低的变化规律,并在T₃时达到峰值,移植6个月的株高、叶数与地径分别为30.93 cm、8.1片和5.04 mm,均极显著高于其他4个处理（P<0.01）,分别是T₁的2.11、1.82和1.67倍;6个月的苗木地上干重和地下干重大小均为：T₃>T₄>T₅>T₂>T₁,T₃的地上干重和地下干重分别为T₁的8.51和5.56倍;T₃的苗木质量指数达到了1.13,显著高于T₅、T₂和T₁（P<0.05）。60%黄心土+40%泥炭的混合基质是米老排组培苗移植的理想育苗基质。

Transplantation Effects of Different Nursery Substrates on the Growth of Tissue Culture Seedlings of Mytilaria laosensis

The effect of different nursery substrates on the transplant survival rate, growth indicator and seedling quality index of M. laosensis tissue culture seedlings was investigated by setting five different nursery substrates according to the volume ratio of two nursery substrates (yellow soil and peat soil). T₁ (100% yellow soil) and T₃ (60% yellow soil+40% peat soil) were more conducive to the survival of M. laosensis seedlings after transplantation, and the survival rate of the seedlings transplanted for 1 month was the highest (83.33% for T₁, and 81.11% for T₃). Plant height, leaf number and ground diameter of M. laosensis seedlings increased first and then decreased with the increase of the proportion of peat soil, and reached the maximum at T_3. The three indicators of the seedlings transplanted after 6 months for T₃ were 30.93 cm, 8.1 and 5.04 mm, respectively, which were significantly higher than those of the other four treatments (P<0.01). The aboveground and underground dry weight of M. laosensis seedlings transplanted after 6 months were T₃ > T₄ > T₅ > T₂ > T₁, and the aboveground and underground dry weight for T₃ were 8.51 and 5.56 times of those of T_1. Furthermore, the seedling quality index of T₃ reached 1.13, which was significantly higher than that of T₅, T₂ and T₁ (P<0.05). Therefore, the mixture nursery substrates with 60% yellow soil and 40% peat soil were the ideal nursery substrates for tissue culture seedlings of M. laosensis.