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Six new taxa of the Bambusoideae are described from Guangdong Pro-
vince, China. They are Indosasa suavis W. T. Lin et Z. J. Feng, Phyllostachys
purpureomaculata W. T. Lin et Z. J. Feng, Arundinaria quadrangula W. T. Lin
et Z. J. Feng, A. pubiannula W. T. Lin et Z. J. Feng, Gelidocalamus
albopubescens W. T. Lin et Z. J. Feng, and Sasa duplicata W. T. Lin et Z. J.Feng. 相似文献
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Silicon＇s organic pool and biological cycle in moso bamboo community of Wuyishan Biosphere Reserve 总被引：3，自引：0，他引：3
Biomineralization of Si by plants into phytolith formation and precipitation of Si into clays during weathering are two important
processes of silicon’s biogeochemical cycle. As a silicon-accumulating plant, the widely distributed and woody Phyllostachys heterocycla var. pubescens (moso bamboo) contributes to storing silicon by biomineralization and, thus, prevents eutrophication of nearby waterbodies
through silicon’s erosion of soil particles.
A study on the organic pool and biological cycle of silicon (Si) of the moso bamboo community was conducted in Wuyishan Biosphere
Reserve, China. The results showed that: (1) the standing crop of the moso bamboo community was 13355.4 g/m2, of which 53.61%, 45.82% and 0.56% are represented by the aboveground and belowground parts of moso bamboos, and the understory
plants, respectively; (2) the annual net primary production of the community was 2887.1 g/(m2·a), among which the aboveground part, belowground part, litterfalls, and other fractions, accounted for 55.86%, 35.30%, 4.50%
and 4.34%, respectively; (3) silicon concentration in stem, branch, leaf, base of stem, root, whip of bamboos, and other plants
was 0.15%, 0.79%, 3.10%, 4.40%, 7.32%, 1.52% and 1.01%, respectively; (4) the total Si accumulated in the standing crop of
moso bamboo community was 448.91 g/m2, with 99.83% of Si of the total community stored in moso bamboo populations; (5) within moso bamboo community, the annual
uptake, retention, and return of Si were 95.75, 68.43, 27.32 g/(m2·a), respectively; (6) the turnover time of Si, which is the time an average atom of Si remains in the soil before it is recycled
into the trees or shrubs, was 16.4 years; (7) the enrichment ratio of Si in the moso bamboo community, which is the ratio
of the mean concentration of nutrients in the net primary production to the mean concentration of nutrients in the biomass
of a community, was 0.64; and lastly, (8) moso bamboo plants stored about 1.26×1010 kg of silicon in the organic pool made up by the moso bamboo forests in the subtropical area of China.
Project (No. 30370275) supported by the National Natural Science Foundation of China 相似文献
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Silicon’s organic pool and biological cycle in moso bamboo community of Wuyishan Biosphere Reserve 总被引：2，自引：0，他引：2
LI Zhen-ji LIN Peng HE Jian-yuan YANG Zhi-wei LIN Yi-ming 《Journal of Zhejiang University. Science. B》2006,(11)
INTRODUCTION Silicon (Si), the element in many plant biolo-gists’ minds, as we come into an age of research ‘insilico’, still is an enigma when it comes to its nutri-tional role in the higher land plants (Raven, 2003).The element occurs in the soil solution at 0.1~0.6mol/m3 as Si(OH)4 (two orders of magnitude higherthan the macronutrient phosphorus (H 2 PO ?4 /HPO 24? ))(Epstein, 1999). Although silicon is not an essentialelement for higher plants, it is an important nutrient for … 相似文献
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邱杰芳 《闽西职业大学学报》2013,(3):92-95
通过随机区组试验设计,对比了竹腔施肥、常规施肥与不施肥3种措施对毛竹生长的影响。研究结果表明,竹腔施肥能有效提高毛竹生长,其出笋量、成竹量和新竹胸径比常规施肥措施分别提高了16．1％,42．8％和3．2％,该技术适合在闽西竹林分布区进一步推广应用。 相似文献
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龚垒英 《宁德师专学报(自然科学版)》2009,21(1):82-84
雷竹出笋早,而且笋期长,笋味鲜美,产量高,成林投产时间短,经济效益高,是公认的笋材兼用好竹种.介绍了雷竹丰产培育的主要技术措施,同时试验结果表明,雷竹引种栽培成活率达94.5%,当年出笋31%,次年出笋87%,第三年出笋98%. 相似文献
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秋季出笋雷竹的氨基酸、激素和营养成分的分析研究 总被引：1，自引：0，他引：1
通过对各种氨基酸的分析,认为SER和ASP在鞭芽萌发中起着一定的作用。SER、MET、ILE三种氨基酸对雷竹林出笋也有一定的作用；笋芽的不同发育阶段的氨基酸含量是不一样的,随着发育阶段的前进,氨基酸含量也上升；从1～3年生的植株分析,认为出笋林分与未出笋林分的氨基酸总量没有明显区别,这说明雷竹林在秋季出笋与未出笋与植株年龄关系不大；通过对内源激素的分析,认为笋芽的萌发主要是由GA_3/ABA的值来调控的；通过对营养成分的分析认为竹林中增施N肥有利于出笋。 相似文献
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