Production and quality of eucalyptus mini-cuttings using kaolin-based particle films

• 来源期刊: 林业研究（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: ORIGINAL PAPERS
• 页码范围: 953-965
• 页数: 13页
• 语种: 英文

摘要

Considering the expansion of forest plantations over the Brazilian territory and the imminent increase in air temperatures due to global warming, the search for technolo-gies that ensure high levels of productivity and high quality plants in clonal nurseries is essential. Applying kaolin-based particle films (KBPF) has been used as a physical barrier to reduce the negative effects of excessive solar radiation and adverse temperatures. The effects of KBPF on production and physiological quality of eucalyptus mini-cuttings were evaluated during two different seasons. A randomized block design was used, consisting of five treatments and four repli-cations. Five concentrations (0, 3％, 5％, 7％, and 10％) were tested here and six weekly replicates of each concentration was applied. The different kaolin concentrations and sea-sonal variations resulted in a quadratic response of the leaf SPAD reading during both daily evaluation periods. KBPF applications resulted in a quadratic response of photochemi-cal efficiency in the morning period, and an increasing spe-cific leaf weight linear response, and during the dry season, the different kaolin concentrations resulted in a bud length quadratic response. The results indicated that the kaolin application maintained the production and yield index sta-tistically equal between weekly KBPF applications, improv-ing photochemical efficiency, leaf thickness, SPAD reading, and bud length. The use of KBPF could reduce the intervals between collections of mini-cuttings and increase nursery yields in environments that present high temperatures.