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10 June 1992, Volume 21 Issue 02 Previous Issue    Next Issue

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THE ECOLOGICAL CHARACTERISTICS AND THE ABOVE-GROUND BIOMASS OF Lsucatna leueocephala IN THE PLANTATION Huang Shengquan, Huang Weinan 1992, 21(02): 1-8.  Abstract ( )   PDF (574KB) ( )   The ecological characteristics of five varieties of Leucaena leucocephala were investigated, and the growth, above-ground biomass and litter-fall were also compared. The five varieties includsd K8, K28, K29, K67 and K132. The rasults shoved that frost-killing temperturs of each variety occared at -5℃. The optimum soil pH for their growth ranged from 5.2 to 7.5, the minimim wllting coefficient ranged from 5.1 to 5.8% in pot experiment. The nitrogenase activity of 5-year-old trees of these varieties were 34.600, 22.764, 20.840, 31.750 and 181.240 μg N2·gFw-1·h-1, respectivaly, and the increment reached 2.24, 106, 1.24, 1.08 and 2.42cm per day, respectively. The above-groand biomass (dry weight) of 3-year-old forests of K8, K28,K29 and K37 were 30.53, 35.83, 30.71 and 42.80 ton·ha-1(4444 plants/ha), respectivaly, and that of K132 was 43.56 ton·ha-(6666 plants/ha) The annual littar-fall of five varieties stand were 4.30 4.49, 8.30, 10.7 and 12.05 ton·ha-1, respectively.The annual biomess of the sprout land of K28 was up to 21.75-25.23 ton·ha-1. Related Articles | Metrics

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STUDIES ON STORAGE OF LONGAN FRUITS Lu Rongxin, Zhan Xuejiao, Wu Jinzhu, Zhuang Rongfu, Huang Weinan, Cai Longxiang, Huang Zbiming 1992, 21(02): 9-17.  Abstract ( )   PDF (598KB) ( )   The effects of temperature,chemical preservative, gas component, package and packing method on the storability of longan fruits were investigated. The results showed that the differences in storability of fruits among longan varieties were marked, and the order of the storability was Quan-zhcuben> Wulonghing> Pumingan> Fuyan> Chike> Shuizhang. The optimum temperature of storage for longan fruits was 3~4℃. The effects of different preservatives on storage of longan fruits were compared. When FISB-1 and FISB-2 were applied, the longan fruits could be stored up to 40 days with normal colour, quality and flavour, and the percentage of good fruits attained 95% and 95.2%, respectively. The percentage of good fruits varied between 80,7%-86.5% with other preservatives, i. e. Secon-dary-buthyl-amids, Secondary-buthyl-amide+GA3, Bavistin, Thiophanate-methyl, Benzoic acid and Tecto (Thiabendazole, TBZ). The best result was obtained when longan fruits were stored in the package covered With polyathylene film under controlled atmosphcre. When O2 content was kept at 6%-8% and CO2 4%-6%, the storage life of fruits was prolonged and the fruit loss was reduced. Related Articles | Metrics

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PRELIMINARY STUDIES ON CONDITIONS OF FERMENTATION AND COMPONENT OF EXOCELLULARPOLYSACCHARIDE FROM Ganoderma lucidum Lin Yaohui, Xu Wenjiang, Liu Xinmin, Shen Yufen 1992, 21(02): 18-23.  Abstract ( )   PDF (1052KB) ( )   The optimum culture conditions for Ganoderma lucidum strain G18801 by liquid fermentation to yield exccellujar polysaccharide and the chemical components of these polysaccharides were studied. The suitable formula of culture fluid (g/L) was. malt sugar 40, peanut meal 30, KH2-PO4 1.5, (NH4)2SO4 1.5,MgSO4·7H2O 0.75 and CaCO3 2, and the optimum initial pH was 5.5.Sixty ml culture fluid was held in 300 ml cone bottle. After shake culture (165 rpm) at 28C for 7-8 days, the yield of pure polysaccharide in fermented fluid was up to 880 mg/L. These exocellular polysaccharides could be seperated into two parts, i.e. water-soluble and water-insoluble. The monoses that made up of water soluble polysaccharide were galactose, glucose, arabinose and xylose, and the ratio was 6:4:4:1. Water-insoluble polysaccharide was glucan. The cyclic configuration of exocellular polysaccharide from Ganoderma lucidum was pyranose. As to that of the terminal configuration, galactose was a configuration and glucose was β. Related Articles | Metrics

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ULTRASTRUCTURE OF HOST CELLS AND FISSUS BACTEROID IN Acacia glauca NODULES Wu Yide 1992, 21(02): 24-27.  Abstract ( )   PDF (822KB) ( )   The early period of symbiotic growth in the Acacia glauca nodule cells is characterized by an increase in the number of rhizobia-bac-teroid and host cytoplasm and organelles. The bacteroids increase by fission until they occupy most region of host cytoplasm. Surrounding bac-teroid membrane envelopes contain one or more bacteroids. The late period of symbiotic growth involves changes in the structure of bacteroid cells as well as the number of host cell organsllos. The symbiotic nitrogen fixation of the nodules is also discussed. Related Articles | Metrics

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A PRELIMINARY STUDY ON THE LAWN AND GROUND COVER PLANTS IN XIAMEN GARDEN Chen Hengbin, Chen Zhongren 1992, 21(02): 28-36.  Abstract ( )   PDF (561KB) ( )   This paper briefs the conception and function of the garden lawn and ground cover plants. The types and use of the plants are also discussed ecologically. The wild and cultured plants used for lawn and ground cover in Xiamen garden are listed. Related Articles | Metrics

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THE WINTER-PROOFING EFFECTS OF BAGGING BANANA BUNCH AND ITS INFLUENCE ON YIELD DURING WINTERING SEASON Chen Wentao, Guo Jinquan, Wu Zhaoping, Zhang Huashu, Zhang Hongtu 1992, 21(02): 37-41.  Abstract ( )   PDF (343KB) ( )   The temperature and winter-proofing effects of bagging the bunch of banana (Musa acuminata cr. Dwarf Davendish) with nattier blue polyethylene film bag as well as the growth and development of fruits and yield were studied. The results showed that after bagging banana bunch in winter, the temperature inside the bag was increased by 1-5℃, therefore the fruits were effectivsly prevented from chilling injury.The growth and development of fruits were also promoted,and the yield of banana was increased by 8-16%. This method is effective to prevent banana fruits from chilling injury and increase the yield in wintering season. Related Articles | Metrics

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SCALE CULTURE OF Zephyranthes candica AN Z. grandiflora IN VITRO Chen Yangchun 1992, 21(02): 42-46.  Abstract ( )   PDF (1027KB) ( )   The effects of plant growth substances on bulblet induction in Zephyranthes Candida and Z. grandiflora were investigated. The result was al$o discussed. Related Articles | Metrics

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THE CORRECT SCIENTIFIC NAMES FOR THREE LONG CULTIVATED PLANTS OF COMMELINACEAE AND THEIR USES Chen Liyun, Chang Yongtian 1992, 21(02): 47-50.  Abstract ( )   PDF (297KB) ( )   From the study on Commclincae, the correct scientific names of three widely and commonly long-cultivated exotic ornamental plants of Tradescantia are clarified. They arc Tradescantia zebrina Hort. ex Bosse, T.Pallida (Rose) D.R. Hunt cv.Purpurea and T. spathacea Sw. Their uses are also described. Related Articles | Metrics

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ERSOURCES OF GARDEN PLANTS IN LONGQISHAN NATURAL RESERVE Huang Yunpeng, Zhang Xinhua 1992, 21(02): 51-54.  Abstract ( )   PDF (254KB) ( )   The resources of garden plants in Longqishan Natural Reserve-were investigated. The status of the resources in the reserve was first identified. A view on the development and utilization of the resour-ces in future was also put forward. Related Articles | Metrics