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首页> 外文期刊>Acta Horticulturae >Root confinement affects canopy growth, dry matter partitioning, carbon assimilation and field behabiour of opuntia ficus-indica potted plants
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Root confinement affects canopy growth, dry matter partitioning, carbon assimilation and field behabiour of opuntia ficus-indica potted plants

机译：根系封闭影响榕树盆栽植物的冠层生长，干物质分配，碳同化和田间行为

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摘要

The objective of this study was to quantify the effect of restricted root volume on canopy and root development and dry matter accumulation in cactus pear Opuntia ficus-indica (L.) Mill. Measurements of canopy and root development as well as malic acid nocturnal accumulation in the cladodes were taken on plants growing on pots of 3.71, 7.51, 151 and 281. Cuttings of the same size were grown in container over two seasons (30 months) before being transplanted in the field. The nocturnal accumulationof malic acid, that in CAM species reflects nocturnal CO_2 uptake, was measured routinely in 1-year old cladodes. Root volume was related to canopy development, and both cladode size and cladode number decreased linearly with container size. A significative reduction of malic acid nocturnal accumulation in 1-year-old cladodes was measured 4 and 6 months after the plant had been placed in 3.71 containers, and sugar content was also highest in plants growing in the smallest container. The reduction of root volume was accompained by a substantial increase of root density which was 2-3 times higher for plants in the smallest containers. The effect of root confinement was still significant after transplanting plants into the field, and vegetative growth andcladode size were still lowest for plants coming from the smallest containers. One year after field planting, plants from containers were still 2 times larger in canopy vlume and produced significantly more fruits than cuttings planted in the field.
机译：这项研究的目的是量化限制的根部体积对仙人掌梨仙人掌-印度（L.）Mill冠层和根系发育以及干物质积累的影响。测量在3.71、7.51、151和281盆上生长的植物上冠层的冠层和根系发育以及苹果酸的夜间积累。在两个季节（30个月）之前，将相同大小的插条在容器中生长在野外移植。定期在1岁大的双壳类动物中测量苹果酸的夜间累积量（在CAM物种中反映出夜间吸收的CO_2）。根的体积与冠层的发育有关，并且枝的大小和枝的数量都随容器的大小线性减少。在将植物放入3.71容器后的4和6个月，测得1岁大的枝条中苹果酸的夜间积累显着减少，并且在最小容器中生长的植物中糖含量也最高。根系体积的减少伴随着根系密度的显着增加，这对于最小容器中的植物而言是高出2-3倍。将植物移植到田间后，根系限制的作用仍然很显着，对于来自最小容器的植物，其营养生长和cladode大小仍然最低。田间播种后一年，容器中的植物冠层羽状器官仍比后者大2倍，并且比田间种植的插条产生的果实多得多。

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