Teeter-Wood Katherine R, Flaherty Edward J, Donetz Alyna J, Hoover Gordon J, MacDonald William N, Wolyn David J, Shelp Barry J
Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada.
Agricxulture Department, Niagara College Canada, Niagara-on-the-Lake, ON L0S 1J0, Canada.
Plants (Basel). 2023 Jun 16;12(12):2348. doi: 10.3390/plants12122348.
Fertilizer boron (B) and molybdenum (Mo) were provided to contrasting cultivars of subirrigated pot chrysanthemums at approximately 6-100% of current industry standards in an otherwise balanced nutrient solution during vegetative growth, and then all nutrients were removed during reproductive growth. Two experiments were conducted for each nutrient in a naturally lit greenhouse using a randomized complete block split-plot design. Boron (0.313-5.00 µmol L) or Mo (0.031-0.500 µmol L) was the main plot, and cultivar was the sub-plot. Petal quilling was observed with leaf-B of 11.3-19.4 mg kg dry mass (DM), whereas Mo deficiency was not observed with leaf-Mo of 1.0-3.7 mg kg DM. Optimized supplies resulted in leaf tissue levels of 48.8-72.5 mg B kg DM and 1.9-4.8 mg Mo kg DM. Boron uptake efficiency was more important than B utilization efficiency in sustaining plant/inflorescence growth with decreasing B supply, whereas Mo uptake and utilization efficiencies appeared to have similar importance in sustaining plant/inflorescence growth with decreasing Mo supply. This research contributes to the development of a sustainable low-input nutrient delivery strategy for floricultural operations, wherein nutrient supply is interrupted during reproductive growth and optimized during vegetative growth.
在营养生长阶段，以当前行业标准的约6 - 100%向淹灌盆栽菊花的不同品种提供肥料硼（B）和钼（Mo），营养液其他成分保持平衡，在生殖生长阶段去除所有养分。在自然光照的温室中，针对每种养分进行了两项实验，采用随机完全区组裂区设计。硼（0.313 - 5.00 µmol/L）或钼（0.031 - 0.500 µmol/L）为主区，品种为副区。当叶片硼含量为11.3 - 19.4 mg/kg干物质（DM）时观察到花瓣卷曲，而当叶片钼含量为1.0 - 3.7 mg/kg DM时未观察到钼缺乏。优化供应使叶片组织硼含量达到48.8 - 72.5 mg/kg DM，钼含量达到1.9 - 4.8 mg/kg DM。随着硼供应减少，硼吸收效率在维持植株/花序生长方面比硼利用效率更重要，而随着钼供应减少，钼吸收效率和利用效率在维持植株/花序生长方面似乎具有相似的重要性。本研究有助于为花卉生产制定可持续的低投入养分供应策略，即在生殖生长阶段中断养分供应，在营养生长阶段优化养分供应。
