Collection of Plants in situ and Conditioning of Butia lallemantii Seedlings

ABSTRACT The objective of this study is to evaluate the survival and development of Butia lallemantii seedlings collected in situ. Seedlings were collected in Alegrete/RS, classified into four stipe diameter classes (SDC) and transplanted into polyethylene bags (2 L) filled with soil-based substrate, animal waste and rice husks. Evaluations were performed at four and eight months assessing survival, and leaf and root aspects after transplanting. The experiment was carried out in a completely randomized design with at least 50 plants per class. The results showed high survival rates for plants with larger stipe diameters, in addition to leaf emission, number of tillers, mature leaves, new roots and during decomposition. High number of new leaves was observed for SDC 2 and 3 (four months) and SDC 2, 3 and 4 (eight months). Therefore, greater survival and emission of vegetative structures were observed, especially in plants with higher diameter.

摘要 本研究旨在评估原地采集的拉氏布迪椰（Butia lallemantii）幼苗的存活与生长状况。研究团队于阿雷格里蒂（Alegrete）/南里奥格兰德州（RS）采集幼苗，将其划分为4个茎径等级（stipe diameter classes, SDC），随后移栽至容积为2升的聚乙烯袋（polyethylene bags）中，袋内装填以土壤为基底的栽培基质（soil-based substrate），并混合动物粪便与稻壳。分别于移栽后4个月与8个月开展评估，统计幼苗存活率并观察其叶片与根系状态。本实验采用完全随机设计，每个茎径等级至少设置50株重复样本。结果显示，茎径更大的幼苗存活率更高，同时其叶片萌发、分蘖数量、成熟叶片数、新根生成及基质分解进程均表现更优。其中，移栽后4个月时，SDC 2与SDC 3等级的幼苗新叶数量更为可观；移栽后8个月时，SDC 2、3、4等级的幼苗新叶数量更多。综上，茎径更大的幼苗存活率更高，营养结构萌发情况更优，这一现象在高茎径等级的幼苗中尤为显著。