1997 Vol. 14, No. 4
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1997, 14(4): 330-332.
Abstract:
The results showed that the water content of air-dried wood averaged 10.96%, ashy substance content 0.72%, hot-water extract content 4.03%, 1% sodium hydroxide extract content 15.92%, benzyl extract content 4.29%, lignin content 31.41%, and poly-pent...
The results showed that the water content of air-dried wood averaged 10.96%, ashy substance content 0.72%, hot-water extract content 4.03%, 1% sodium hydroxide extract content 15.92%, benzyl extract content 4.29%, lignin content 31.41%, and poly-pent...
1997, 14(4): 333-338.
Abstract:
Using principal component analysis, the fast-growing clones with high and stable seed production, and great resistance of the filial generations were selected as materials of the first generation improved orchard, which obtained genetic gain of 150. ...
Using principal component analysis, the fast-growing clones with high and stable seed production, and great resistance of the filial generations were selected as materials of the first generation improved orchard, which obtained genetic gain of 150. ...
1997, 14(4): 315-319.
Abstract:
A study on postharvest physiology of chestnuts in 5 clones of Castanea mollissima shows that Chinese chestnut is a kind of climacteric nuts. Both respiration rate and activity of amylases gradually increase one week after the spined cupule is removed...
A study on postharvest physiology of chestnuts in 5 clones of Castanea mollissima shows that Chinese chestnut is a kind of climacteric nuts. Both respiration rate and activity of amylases gradually increase one week after the spined cupule is removed...
1997, 14(4): 320-323.
Abstract:
A study on methods for germinated seed gragting in Chinese chestnut and on the effect of temperature for healing of graft union and nursery planting on raising of grafted seedlings showed that 82. 28% was contributed to by established seedlings from ...
A study on methods for germinated seed gragting in Chinese chestnut and on the effect of temperature for healing of graft union and nursery planting on raising of grafted seedlings showed that 82. 28% was contributed to by established seedlings from ...
1997, 14(4): 324-326.
Abstract:
A 8 hm2 stand of Chinese chestnut fruiting early with high yield was established in 1993. The yield for 4-year-old trees amounted to 12195. 2 kg hm- 2 on the average with effective technical measures taken, which is of significance to chestnut produc...
A 8 hm2 stand of Chinese chestnut fruiting early with high yield was established in 1993. The yield for 4-year-old trees amounted to 12195. 2 kg hm- 2 on the average with effective technical measures taken, which is of significance to chestnut produc...
1997, 14(4): 327-329.
Abstract:
The main reason for low survival rate of grafted Chinese chestnut on wild chestnuts lied in that the chits on parent stocks were not moved in time. All the wild chestnut trees with more than 1. 2 cm diameter at tree basis could be used as parent stoc...
The main reason for low survival rate of grafted Chinese chestnut on wild chestnuts lied in that the chits on parent stocks were not moved in time. All the wild chestnut trees with more than 1. 2 cm diameter at tree basis could be used as parent stoc...
1997, 14(4): 339-343.
Abstract:
The three-level artificial neural networks was applicated to study the law of oriented cultivation of Chinese fir stocky plants. The data of 36 groups were measured from sowing( A ), final seedling time ( B ) and final seedling number ( C ). The rela...
The three-level artificial neural networks was applicated to study the law of oriented cultivation of Chinese fir stocky plants. The data of 36 groups were measured from sowing( A ), final seedling time ( B ) and final seedling number ( C ). The rela...
1997, 14(4): 344-349.
Abstract:
The effect of different logging systems, such as the tractor skidding, cable yarding and chutting on forest soil, were analysed. The results showed that tractor skidding seriously affected the hardness, bulk density and macropore space of the soil an...
The effect of different logging systems, such as the tractor skidding, cable yarding and chutting on forest soil, were analysed. The results showed that tractor skidding seriously affected the hardness, bulk density and macropore space of the soil an...
1997, 14(4): 350-354.
Abstract:
The results showed that the adhesive rate did not affect MOR and MOE of the laminated bamboo boards. The adhesive rate significantly afacted TS in cool water and in boiling water, TS growed with the adhesive rate reducing.
The results showed that the adhesive rate did not affect MOR and MOE of the laminated bamboo boards. The adhesive rate significantly afacted TS in cool water and in boiling water, TS growed with the adhesive rate reducing.
1997, 14(4): 355-362.
Abstract:
Calycanthus chinensis is a tertiary relict species and is endemic in China with a very restricted natural distribution area. It is in immminene danger and has been listed in rare and endangered plants of second order by China. This article analyses t...
Calycanthus chinensis is a tertiary relict species and is endemic in China with a very restricted natural distribution area. It is in immminene danger and has been listed in rare and endangered plants of second order by China. This article analyses t...
1997, 14(4): 363-369.
Abstract:
Orchidaceae plants in Mt. Tianmu included 24 genera and 35 species. Classificationand idex of the plants were mainly based on plant forms. The temperate zone compositions were dominating over the Orchidaceae plants in Mt. Tianmu.
Orchidaceae plants in Mt. Tianmu included 24 genera and 35 species. Classificationand idex of the plants were mainly based on plant forms. The temperate zone compositions were dominating over the Orchidaceae plants in Mt. Tianmu.
1997, 14(4): 370-374.
Abstract:
There are 278 species of woody scantentes in the north-western areas of Fujian, belonging to 83 genera of 41 families, having more tropical components. There are more small families and single families and genera than large ones. The analysis of the ...
There are 278 species of woody scantentes in the north-western areas of Fujian, belonging to 83 genera of 41 families, having more tropical components. There are more small families and single families and genera than large ones. The analysis of the ...
1997, 14(4): 375-381.
Abstract:
In this study, a total of six investigation plots with different kinds of tourist resources were selected in the West Lake scenic resorts of Hangzhou. Within each investigation plot, the factors to affect tourist resources quality (TRQ) were divided ...
In this study, a total of six investigation plots with different kinds of tourist resources were selected in the West Lake scenic resorts of Hangzhou. Within each investigation plot, the factors to affect tourist resources quality (TRQ) were divided ...
1997, 14(4): 382-387.
Abstract:
This paper introduces a recurrence formula for estimating the variances of errors of a sequence forecasted by an autoregression model and gives two examples under both smooth and nonsmooth conditions.
This paper introduces a recurrence formula for estimating the variances of errors of a sequence forecasted by an autoregression model and gives two examples under both smooth and nonsmooth conditions.
1997, 14(4): 388-392.
Abstract:
The green industry has been developed in China at present. This paper analyses its characteristics and claim. To push forward the rapid development of China s green industry, some countermeasures are put forward: to strengthen consciousness of enviro...
The green industry has been developed in China at present. This paper analyses its characteristics and claim. To push forward the rapid development of China s green industry, some countermeasures are put forward: to strengthen consciousness of enviro...
1997, 14(4): 393-396.
Abstract:
Land is the basic means of agricultural production. There are great potentials in land-developing in China s vast mountain and hill areas. But only those land-developing that produce good integral effect can raise China s sustainable agricultural dev...
Land is the basic means of agricultural production. There are great potentials in land-developing in China s vast mountain and hill areas. But only those land-developing that produce good integral effect can raise China s sustainable agricultural dev...
1997, 14(4): 397-401.
Abstract:
From an analysis of a large number of English abstracts from the published scientific and technological periodicals, obtained are their main language characteristics, which are as follows: passive voice and the third person are often used, and semi-t...
From an analysis of a large number of English abstracts from the published scientific and technological periodicals, obtained are their main language characteristics, which are as follows: passive voice and the third person are often used, and semi-t...
1997, 14(4): 402-405.
Abstract:
This article analyses the reasons of the abundance of college students informal little groups. It advances that teachers should streng then the building of students grass-roots unit and standardize the informal little groups.
This article analyses the reasons of the abundance of college students informal little groups. It advances that teachers should streng then the building of students grass-roots unit and standardize the informal little groups.
1997, 14(4): 406-409.
Abstract:
The results of the organic extracts of Cornus of ficinal is stone were directly added on maize starch adhesive and cassava starch adhesive showed that the extracts had a function that prevents the starch adhesives from mildewing and promotes stabilit...
The results of the organic extracts of Cornus of ficinal is stone were directly added on maize starch adhesive and cassava starch adhesive showed that the extracts had a function that prevents the starch adhesives from mildewing and promotes stabilit...
1997, 14(4): 410-414.
Abstract:
The results showed that there were flavonoid, glucide, amino acids and anthraquinone in the extracts from leaves of Phyllostachys praecox and Ph. prominens. By anthrano nesulphuric acid method, the contents of water-soluble sugars in cool water extra...
The results showed that there were flavonoid, glucide, amino acids and anthraquinone in the extracts from leaves of Phyllostachys praecox and Ph. prominens. By anthrano nesulphuric acid method, the contents of water-soluble sugars in cool water extra...
1997, 14(4): 415-418.
Abstract:
According to the results of oven drying cones by fixed temperature oven, seed extraction and germinating test, the best drying temperature for pond pine cones was at 41-50℃. Seed extraction and germinating measurement were made after drying the cones...
According to the results of oven drying cones by fixed temperature oven, seed extraction and germinating test, the best drying temperature for pond pine cones was at 41-50℃. Seed extraction and germinating measurement were made after drying the cones...
1997, 14(4): 419-423.
Abstract:
With the data from Database of Chinese Science and Technology Periodical between 19891995, the documents on studying ginkgo ( Ginkgo biloba L. ) were analysed by the methods of document measurement. And the age distribution, subject distribution and ...
With the data from Database of Chinese Science and Technology Periodical between 19891995, the documents on studying ginkgo ( Ginkgo biloba L. ) were analysed by the methods of document measurement. And the age distribution, subject distribution and ...
