不同基质材料对油茶容器苗生长生物量及养分含量的影响

Effects of Different Substrate Materials on Growth Biomass and Nutrient Element Contents of Camellia oleifera Container Seedlings

研究不同基质材料对油茶容器苗的影响,寻找可以部分替代泥炭土的本土基质材料。在不同处理育苗条件下,测定1年生油茶容器苗的成活率、生长量、生物量、叶绿素含量和地上部分营养元素含量,并分析基质与地上部分营养元素含量的相关性。试验结果发现:成活率、苗高、地径、高径比、主根长、主根/侧根鲜重、地上/地下生物量、茎根比/FW、茎根比/DW、叶绿素含量等指标以处理Ⅰ(50%泥炭土+50%其余相同成分)与处理Ⅴ(5%食用菌下脚料+5%鸡粪+5%牛粪+35%泥炭土+50%其余相同成分)表现最优,且两者均与其他3个处理差异显著;各处理间氮、磷、钾、钙、硫、铁、锰、铜、锌元素含量差异显著,但镁、硼元素含量差异不明显。相关性分析表明,镁元素与速效钾、有机质呈显著的正相关,而其他元素为负相关。综上所得,处理Ⅴ在用本土基质来替代部分泥炭土的结果最好。本研究为降低油茶基质育苗成本和维持基质的可持续利用提供一条新的途径。

The experiment was conducted to study the effects of different substrate material on Camellia oleifera container seedlings, and find out the local substrates instead of peat soil content. One-year-old C. oleifera container seedlings of different substrate treatments were tested in several indicators such as survival rate, growth, biomass, the contents of chlorophyll and nutrient elements aboveground, and the correlation between substrate and contents of nutrient element aboveground was also analyzed. The indexes including survival rate, height of seeding, ground diameter, ratio of height to ground diameter, tap root length, tap root/lateral root fresh weigh, aboveground/underground biomass, the diameter root ratio/FW, the diameter root ratio/DW, and contents of chlorophyll were superior in treatment I （50% Peat soil ＋ 50% the rest of the same composition） and treatment V （5% the rest of edible mushroom ＋5% fowl dung ＋5% cow dung ＋35% Peat soil ＋50% the zest of the same composition）, and there was significant difference between them and other three treatments. There was significant difference in the contents of N, P, K, Ca, S, Fe, Mn, Cu and Zn, and no significant difference in B and Mg between different treatments. The correlation analysis showed that Mg ;＇and available potassium, organic matter had significantly positive correlation, and others had negative correlation. Thefefore, the best substrate was treatment V, in which local substrate instead of part of the peat soil. The study＇ would provide a new way of reducing seedling costs and maintaining sustainable utilization of substrate.