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首页> 外文期刊>Journal of Arboriculture >Use of sugars to improve root growth and increase transplant success of birch (Betula pendula Roth.).
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Use of sugars to improve root growth and increase transplant success of birch (Betula pendula Roth.).

机译：用糖改善根的生长并增加桦树的移植成功率（Betula pendula Roth。）。

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Two field trials undertaken during 1999 and 2003 in the UK investigated the influence of a range of sugars applied as a root drench at 25, 50, and 70 g/litre (3.4, 6.8, and 10.3 oz/gal) of water on root and shoot growth, chlorophyll fluorescence, photosynthetic rates, and leaf carotenoid and chlorophyll concentrations of birch (Betula pendula). Irrespective of concentration and year, the sugars galactose and rhamnose had no significant effects on tree growth or leaf photosynthetic properties. Application of the sugar maltose increased shoot and root dry weight in the 1999 trial but had no effect in the 2003 trial. Sucrose, fructose, and glucose increased shoot and root dry weight in both 1999 and 2003 trials; however, growth responses were influenced by the concentration of sugar applied. In many cases, sugar application increased the number of new roots formed by week 6 but had no significant effects on the length of existing roots or shoot growth. By week 24, increases in both root and shoot growth were recorded. Sugar feeding at 25 g/litre (3.4 oz/gal) of water had no significant effect on leaf chlorophyll fluorescence, photosynthetic rates, or carotenoid and chlorophyll concentrations; however, sugar feeding at 50 and 75 g/litre (6.8 and 10.3 oz/gal) of water reduced these values by week 6. At the cessation of the experiment, maximal increase in root and shoot growth was associated with a root drench of sucrose at a concentration of 70 g/litre (10.3 oz/gal) of water in both 1999 and 2003 trials. Lower mortality rates recorded in sugar-treated trees indicate applications of sugars would aid in the survival of young birch trees following transplanting.
机译：1999年和2003年在英国进行的两项田间试验研究了以25、50和70克/升（3.4、6.8和10.3盎司/加仑）的水作为根部滴灌使用的各种糖对根和根的影响。枝条生长，叶绿素荧光，光合速率以及桦树（Betula pendula）的叶类胡萝卜素和叶绿素浓度。不论浓度和年份，糖半乳糖和鼠李糖对树木的生长或叶片的光合特性均无显着影响。糖麦芽糖的使用在1999年的试验中增加了芽和根的干重，但在2003年的试验中没有作用。在1999年和2003年的试验中，蔗糖，果糖和葡萄糖均增加了枝条和根的干重。但是，生长反应受所用糖浓度的影响。在许多情况下，施糖增加了第6周形成的新根的数量，但对现有根的长度或枝条生长没有显着影响。到第24周，记录了根和芽生长的增加。以25克/升（3.4盎司/加仑）的水喂食糖对叶片的叶绿素荧光，光合速率或类胡萝卜素和叶绿素浓度没有显着影响。然而，到第6周时，以50和75克/升（6.8和10.3盎司/加仑）的水补糖会降低这些值。在实验停止时，根和茎的最大增长与蔗糖的根浸有关在1999年和2003年的试验中，水的浓度为70克/升（10.3盎司/加仑）。糖处理过的树木中记录的较低死亡率表明，糖的应用将有助于移植后年轻桦树的生存。

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