Considering the expansion of forest plantations over the Brazilian territory and the imminent increase in air temperatures due to global warming, the search for technologies 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 replications. 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 seasonal variations resulted in a quadratic response of the leaf SPAD reading during both daily evaluation periods. KBPF applications resulted in a quadratic response of photochemical efficiency in the morning period, and an increasing specific 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 statistically equal between weekly KBPF applications, improving 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.

考虑到巴西领土上人工林的扩张以及由于全球变暖而即将使空气温度升高的问题，寻找确保克隆苗圃中高水平生产力和高质量植物的技术至关重要。应用高岭土基颗粒薄膜（KBPF）作为物理屏障可以减少过多的太阳辐射和不利温度的负面影响。在两个不同的季节，评估了KBPF对桉树小型插条产量和生理品质的影响。使用随机区组设计，包括五个处理和四个重复。在此测试了五个浓度（0％，3％，5％，7％和10％），每个浓度每周重复六次。不同的高岭土浓度和季节性变化导致在两个每日评估期间叶片SPAD读数的二次响应。KBPF的应用导致早晨光化学效率的二次响应，以及比叶重量线性响应的增加，而在干旱季节，不同的高岭土浓度导致芽长二次响应。结果表明，高岭土施用在每周KBPF施用之间保持统计学上相等的产量和产量指数，从而提高了光化学效率，叶片厚度，SPAD读数和芽长。在存在高温的环境中，KBPF的使用可以缩短小切块收集之间的间隔，并提高苗圃产量。