Tipping off pruning and use of biofertilizer in the growth of pecan trees

Abstract In Brazil, the cultivation of pecan trees has substantially increased in the last years, thus requiring the development of scientific research and technologies to improve it. Thus, the aim of this study was to evaluate the tipping off effect associated with the use of biofertilizer in the growth of newly implanted plants in their final site. The treatments consisted of : control; application of “supermagro” biofertilizer; tipping off of plants, and tipping off associated with the use of biofertilizer. The variables evaluated were: plant height; plant growth rate; stem thickness; number of leaves, and number of leaves/stem height ratio. In addition, leaf nutrient content analysis was performed. Tipping off and the use of biofertilizer provide greater growth of the plant height and cultivar scion diameter after sprouting. Thus, tipping off associated with biofertilizer can be used in the early phase of the pecan orchard implantation to provide the best plant development.

摘要 近年来，巴西的碧根果（pecan）种植产业规模大幅扩张，亟需开展相关科学研究与技术研发以提升种植水平。本研究旨在评估摘心处理联合生物肥料（biofertilizer）施用，对定植于永久种植位点的新生碧根果植株生长的影响。试验共设置4组处理：空白对照组；施用"Supermagro"生物肥料组；植株摘心组；摘心联合生物肥料施用组。本研究测定的指标包括：植株株高、生长速率、茎粗、叶片数以及叶片数与株高的比值。此外，还开展了叶片营养成分分析。研究结果表明，摘心与生物肥料施用均可促进萌芽后植株株高与品种接穗茎粗的生长。因此，在碧根果园定植初期，采用摘心联合生物肥料施用的措施，可实现植株的最优生长发育。