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10 June 1998, Volume 27 Issue 02
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Dynamics of Si Element in
Dendrocalamopsis oldhami
Forest
Lin Yiming, Lin Peng
1998, 27(
02
): 1-6.
Abstract
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This paper deals with the contents, pool amounts and annual dynamics of Si element in
Dendrocalampsis oldhami
forest in south Fujiqn, China. The results were as follows:1. Si element contents (% dw) varied in various fractions of
Dendrocalameopsis oldhami
forest. The range of contents was 0.208%~ 6.346% and the order in various fractions was leaf> fine root> branch> rhizome> stem.2. The pool amounts of Si element in the standing crop of biomass were 261.168 g/m
2
, in which those of aerial part were 207.385 g/m
2
(accounting for 79.41%)and those of under ground portion were 53. 783 g/m
2
(20.59%). The distribution of aerial part were higher than those of under ground portion in
Dendrocalamopsis oldhami
forest.3. Si element contents of
Dendrocalameopsis oldhami
leaves tended to increase from summer to winter, with the exception of that in November 1996; the highest was in February 1997; but Si element contents decreased gradually in spring, the lowest was in May 1997.4. Si element contents continually released and accumulated from decomposing fine roots in
Dendrocalamopsis oldhami
forest from July 1996 to June 1997.
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The Community Characteristies of Natural Forests of
Castaopsis hrstrix
Huang Quanneng, Chen Cunji, Qiu Erfa, Liang Yichi
1998, 27(
02
): 7-11.
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By surveying and analyzing the community characteristies of natural forests of
Castaopsis hrstrix
, including species composition, numerical characteristics, structure, population, niche, species diversity, and the community formation, development and succession, this paper reveals the community structure and the law of growth and development of
Castaopsis hystrix
and lays a foundation of biological theory for its cultivation.
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Studies on Mutation and Selection of Kojic Acid-producing Mold
Zhou Weidong, Shen Yufen, Chen Yiliang, Chen Songhe, Lin Yaohui
1998, 27(
02
): 12-16.
Abstract
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)
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A mutant strain UV
21012-1
producing Kojic acid was obtained from the start strain
Aspergillus oryzae
2336 treated with ultraviolet irradiation twice.This mutant strain exhibited good genetic stability in the procedure of successive inoculation and fermentation. The kojic acid productivity of the UV
21012-1
increased by 1. 68 times compared with that of the start strain. Meanwhile, the fermentation period of UV
21012-1
was shorter than that of the start strain.
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Determination of Vanillin in Vanilla Beau by HPLC
Huang Yuhuan, Liu Hongzhou, You Ruichen
1998, 27(
02
): 17-20.
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Vanillin was extracted from vanilla bean with 60% ethyl alcohol, and then separated by HPLC and determined at UV 330 nm. This method offers a new approach simplifying the treatment of samples and saving time as well as lowering operating costs. The lowest limit of vanillin content of vanilla bean using this method was 0. 01 μg.
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Effect of Root Induction on Transplantation and Survival Rate of Strawberry
in vitro
Plantlets
Tan Zhiyou
1998, 27(
02
): 21-25.
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Influence of duration of induction, root number and length on the survival rate and the growth of shoots of strawberry plantlets were studied. The results showed that the induction period at 41~50 days gave the best effect on the plantlets, which survived up to 94%. The more the roots, the easier the plantlets survived. The roots length at 5.0~10.0 cm was beneficial to survival.
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A Preliminary Survey of
Alsophils spinulosa
in Qingyunshan Scenic Spot Yongtai County, Fujian
Song Shilan
1998, 27(
02
): 26-29.
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)
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The number, height, chest——diameter, crown scope and growth environment of
Alsophila spinulosa
were investigated in Qingyunshan scenic spot Yongtai county. According to analyzing the relation of the growth and reproduction to environment. The protection measure to
Alsophila spinulosa
was put forward.
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Identification and Control of the Pathogen of Chinese Yam Anthracnose in Shaxian, Fujian
Lin Yongkang
1998, 27(
02
): 30-33.
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The specimens of anthracnose of Chinese yam (
Dioscorea batata
) were collected from Yangfang, Shaxian, Fujian. The pathogen was identified as
Colletotrichum copsici
. The appresoria formed from hyphae and conidia in water culture on the slide. The control measures of the disease are suggested in this paper.
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Bionomics of
Pseudococcus adonidum
Geoffr and Its Control
Wang Jin, Guo Rongfang, Zheng Yunju
1998, 27(
02
): 34-38.
Abstract
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)
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(291KB) (
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Pseudococcus adonidum
Geoffr is a serious insect pest living on the street tree in Xiamen. It occurs 5~6 generations a year. The nymphes hibernate on the back of the leaves and begin to appear in early March in the following year.The duration of insect egg is 6 days and that of adults 13 days. Spraying with 90%Diptere, 80% Boichlovos and 50% Phoximic gave the best results for controlling the nymphes.
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The Chemical Constituents of
Ampelopsis grossedentata
Wang Dingyong, Liu Jiaming, Zhang Junde, Zheng Shangzhen
1998, 27(
02
): 39-44.
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Nine compounds were isolated from the Et0Ac extraction of
Ampelopsis grossedentata
. By the evidence of spectral analyses and chemical methods, they were identified as palmitic acid (1),β-sitosterol (2), emodin (3), methylgallate (4),quercetin (5), quercetin-3-0-β-D-glucoside (6), taxifol in (7), apigenin (8) and ampelopsin (9). These compounds were first isolated from this plant.
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Barringtonia racemosa
——An Excellent Ornamental Tree
Lin Xi
1998, 27(
02
): 45-47.
Abstract
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(211KB) (
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Barringtonia racemosa
is an ornamental tree introduced from Hainan to Xiamen recently. The morphological characters, biological characteristics and the introduction and cultivation are described. The main points of cultivation are also discussed.
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The Application of Araceae spp. to Oriented Vertically Greening
Chen Donghua, Shen Huifei
1998, 27(
02
): 48-51.
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(262KB) (
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The Araceae spp.
Epipremnum aureum
‘Golden Pride’,
E. aureum
‘Marble Queen’,
Philodendron
‘Red Emerald’,
P
. ‘Emerald Queen’ and
Syngonium
‘White Butterfly’ have good characteristies such as easy cultivation, fast growing, bright and beautiful color, evergreenness, moistupe-tolerance, climbing and creeping.They have been applied to greening in Xiamen. The results showed that they have been cultured not only for embellishing indoor and garden but also for oriented vertically greening outdoor in city to increase the forms of oriented vertically greening in coastal cities.
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Current State Utilization of Medicinal Substances from
Ginkgo biloba
and Their Prospects
Wu Yuanli
1998, 27(
02
): 52-55.
Abstract
(
)
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(290KB) (
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The extract of
Ginkgo biloba
leaves is the most important source of ginkgolides and bilobalide, but the extraction sitll exists some limiting factors,such as environment, season, etc. on the other hand, the production of ginkgolides and bilobalide through
Ginkgo biloba
tissue and cell culture is under its initial stage. However the developing technigue can be used not only in producing ginkgolides and bilobalide but also in conducting theoretical study of
Ginkgo biloba
.
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Culture of Basal Bearing Shoot and Regulation of Winter Shoot and Degradation of Inflorescence in Longan
Huang Caixia, Zhou Yiguo
1998, 27(
02
): 56-61.
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The characteristics of longan basal bearing shoots at various sprouting stages, the biological index and cultubal measures of elite basal bearing shoots, the sprouting reason and regulation technique of winter shoots, and the reason, types and control ways of dogradation of longan inflorescence are reviewed in this paper.
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The Interaction between Aerial Part and Under Ground Portion in Evergreen Fruit Trees
Qiu Jindan, Wu Dingyao
1998, 27(
02
): 62-67.
Abstract
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(443KB) (
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There exists many interaction between aerial part and under ground port ion in evergreen fruit trees, with respect to inter——nutrition, alternate growth,canopy symmetry and growth balance, mycorrhizal effect and hormone regulation. In cultural practices, early bearing, high yielding and good quality could be achieved through regulation of the above——mentioned balanced interaction with comprehensive techniques.
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