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| 1 | 邻株竞争对低磷环境杉木幼苗光合特性及生物量分配的影响显示文摘选择同一杉木(Cunninghamia lanceolata)无性系幼苗为研究对象,通过设计邻株竞争处理和3个供磷水平的室内沙培模拟试验,采用破坏性收获方式,分别于试验初期、中期和末期测定不同竞争与供磷水平条件下杉木幼苗光合特性和生物量分配的变化规律,综合分析邻株竞争对低磷环境杉木响应行为的影响。结果表明:竞争处理、供磷水平和胁迫时期三者对杉木幼苗4个光合特性指标的影响均存在明显的交互作用(p<0.05),而对生物量分配的交互作用未达显著水平(p>0.05)。低磷和不供磷处理条件下杉木幼苗叶片的净光合速率、蒸腾速率和气孔导度均明显较低,其中缺磷胁迫和邻株竞争对叶片气孔导度的降低具有叠加效应。随着竞争和低磷处理时间的延长,杉木幼苗叶片蒸腾速率逐渐降低,但气孔导度和胞间CO2浓度呈先下降后上升的趋势,而根系生物量和根冠比均显著增加。 | 陈智裕 李琦 邹显花 马祥庆 吴鹏飞 | 2016 | 植物生态学报2016，40，2： | 11 |
| 2 | 杉木采穗母树根基穗条产量调控及生根率分析显示文摘为有效调控杉木采穗圃母树根基萌发的能力,探寻提高穗条产量及质量的方法,通过连续6个月对杉木采穗圃母树根基分别进行遮光、覆土、喷洒植物生长调节剂和滴加霍格兰营养液4种处理,测定母树根基穗条产量及其扦插生根率。结果表明,不同程度遮光处理下,4月份杉木根基穗条产量最高,其中遮光75%时效果最佳,且5月份遮光处理显著提高了穗条生根率。无覆土处理下穗条产量及生根率明显高于覆土5和15 cm。与喷洒清水处理相比,喷洒生长素处理明显提高了穗条产量;而喷洒脱落酸处理有效抑制了根基穗条的萌发,且明显降低了4、5月份采集的穗条生根率。滴加不同浓度营养液的穗条产量均高于清水处理,且滴加霍格兰完全营养液的效果最好。遮光75%、喷洒生长素和滴加霍格兰营养液这3种措施可提高穗条产量;而覆土、施用脱落酸则会减少穗条产量,并在一定程度上造成穗条质量下降。 | 潘洁琳 吴凯 王讷敏 杨振 马祥庆 吴鹏飞 | 2018 | 森林与环境学报2018，38，4： | 5 |
| 3 | Does the root to shoot ratio show a hormetic response to stress? An ecological and environmental perspective显示文摘Root/shoot(R/S)ratio is an important index for assessing plant health,and has received increased attention in the last decades as a sensitive indicator of plant stress induced by chemical or physical agents.The R/S ratio has been discussed in the context of ecological theory and its potential importance in ecological succession,where species follow different strategies for above-ground growth for light or below-ground competition for water and nutrients.We present evidence showing the R/S ratio follows a biphasic dose–response relationship under stress,typical of hormesis.The R/S ratio in response to stress has been widely compared among species and ecological succession classes.It is constrained by a variety of factors such as ontogeny.Furthermore,the current literature lacks dose-response studies incorporating the full dose–response continuum,hence limiting scientific understanding and possible valuable application.The data presented provide an important perspective for new-generation studies that can advance current ecological understanding and improve carbon storage estimates by R/S ratio considerations.Hormetic response of the R/S ratio can have an important role in forestry for producing seedlings with desired characteristics to achieve maximum health/productivity and resilience under plantation conditions. | Evgenios Agathokleous Regina G.Belz Mitsutoshi Kitao Takayoshi Koike Edward J.Calabrese | 2019 | Journal of Forestry Research2019，30，5： | 5 |
| 4 | Morphological plasticity and phosphorus uptake mechanisms of hybrid Eucalyptus roots under spatially heterogeneous phosphorus stress显示文摘In this study, we subjected the root systems of eight Eucalyptus hybrids currently cultivated in southern China to heterogeneous phosphorus stress to provide a scientific basis for the selection of a highly phosphorusefficient Eucalyptus variety. When the ability of these hybrids to locate phosphorus under different experimental conditions(phosphorus supply in a homogeneous or heterogeneous manner vs. no phosphorus supply) was compared, the main growth characteristics of Eucalyptus,such as plant height, diameter, dry mass, and phosphorus content, significantly improved when the phosphorus supply was increased from no phosphorus or heterogeneous phosphorus(half of the phosphorus amount) to homogeneous phosphorus. Across these three conditions, the growth traits of different Eucalyptus hybrids differed significantly, indicating different adaptabilities of the hybrids to various phosphorus conditions. The growth traits of the aboveground tissues of Eucalyptus under different phosphorus conditions were largely influenced by the morphology of the underground root system. In addition, the root morphology of Eucalyptus under heterogeneous phosphorus treatment suggested that there were two mechanisms for locating nutrients. Eucalyptus hybrids such as Urophylla 3229, Grandis 9, Guanglin 3, 201-2, and Dunn produced more roots proximal to the phosphorus supply; the other hybrids, Urophylla 3216, Grandis 5, and Guanglin 9, relied mainly on the growth of roots opposite the phosphorus supply to obtain adequate nutrients for growth. With these two strategies, a wide range of nutrients was obtained, root distribution was greater, more soil volume was covered, the contact area of the roots with soil phosphorus was increased, and the uptake of phosphorus by the root system was increased. These results demonstrate that Eucalyptus relies on changes to morphological characteristics of the root system to increase accessibility to phosphorus resources. | Chuifan Zhou Wuya Jiang Ying Li Xiaolong Hou Aiqin Liu Liping Cai | 2017 | Journal of Forestry Research2017，28，4： | 3 |
| 5 | Growth rates of Eucalyptus and other Australian native tree species derived from seven decades of growth monitoring显示文摘There is widespread interest in estimating and forecasting individual tree and forest growth rates for restoration and carbon sequestration objectives. Outside intensively managed forests, past attempts have been limited by the lack of accurate long-term monitoring in multi-age mixed native forests to provide estimates of both expected mean diameter increments and the statistical variation in those estimates. A dataset from Eucalyptus-dominated native forests in subtropical Queensland, Australia offers an opportunity to provide accurate estimates of tree and forest growth rates. Over 86,400 trees from 155 native species were identified and remeasured between 1936 and 2011 in 641 permanent sample plots across a 500–2000 mm mean annual rainfall gradient. Individual tree diameter at breast height(DBH) increments observed for all species ranged mainly from 0.01 to 0.5 cm yr-1(94 % of values), with consistent differences between rainfall zones(mean of 500–2000 mm yr-1), and varying differences between species(155) and stem diameter class(10–100 cm). For some species, diameter increment increased progressively with rainfall(e.g. Eucalyptus siderophloia, Eucalyptus propinqua,and Lophostemon confertus), but in others(e.g. Corymbia citriodora subsp. variegata, Corymbia intermedia, and Eucalyptus biturbinata) the greatest diameter increments were recorded between 1200 and 1600 mm yr-1. Where there were sufficient data, most species exhibited a quadratic relationship between DBH increment and DBH class, but two species(Callitris glaucophylla and Eucalyptus crebra)native to the 500–800 mm annual rainfall zone showed linear increases in DBH increment with increasing DBH.Continued monitoring of these plots would add to their already great value. | Michael R.Ngugi David Doley Mark Cant Daniel B.Botkin | 2015 | Journal of Forestry Research2015，26，4： | 1 |
| 6 | Morphological,physiological and biochemical traits of Cordia trichotoma under phosphorous application and a water-retaining polymer显示文摘The application of phosphorus(P)and a waterretaining polymer to the soil can increase the availability of P for Cordia trichotoma,having a positive effect on the plants.The objective of this study was to evaluate the morphological,physiological and biochemical characteristics of C.trichotoma plants were cultivated in a red argisol and treated with 120,240 and 360 kg P2O5 ha^(−1)and no phosphorous addition as a control,in the presence(5 g L^(−1)per seedling)and absence of a water-retaining polymer.Twentyfour months after planting,survival,height,stem diameter,shoot and root dry matter,leaf area,photosynthetic pigment concentration,chlorophyll a fluorescence,acid phosphatase enzyme activity(APase)and P in tissues and soil were determined.The polymer had no effect on survival and the other parameters.The addition of P increased growth,dry matter production,photosynthetic pigment concentrations,the use of light energy and maximum quantum yield of photosystem II.Plants cultivated in soil with 240 kg P2O5 ha^(−1)application had 4.7 and 5.4 times more shoot and root dry matter,respectively,than control plants.This dosage also showed 52.1%greater photochemical energy use than the control plants.Plants cultivated without the addition of P showed higher activity of the APase enzyme. | Álvaro Luís Pasquetti Berghetti Maristela Machado Araujo Luciane Almeri Tabaldi Felipe Turchetto Suelen Carpenedo Aimi Daniele Guarienti Rorato Carina Marchezan Adriana Maria Griebeler Felipe Manzoni Barbosa Gustavo Brunetto | 2021 | Journal of Forestry Research2021，32，2： | 0 |
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