These experiments found out the principal conditions for effectively storing Hopea hainanensis seeds, which are, as the key, the dermination and maintaining of seed water content within safe ranges, 33—35% for smaller ones, 36—38% for bigger ones, the lower storage temperature at 15—20℃, and the slow ventilation resulting the air O₂ content within 10—15%. It was suggested that the measures assure these storage conditions from experiments. The chief chemical composition of kernels, the changes of seed and medium water content, seed vigor, seed respiration, and catalase or dehydrogenase activity in hypocotyls, during storage period were determinate. The experiment of test had proved that controlling seed water content within 35—38%, storage temperature at about 18℃, the high quality seeds still remained GP above 80% after storing more than a year.

In the present work, we have comparatively studied the formation and accumulation of the oil, the characteristic of oil and the variations of fatty acid of Olea europaea L. varieties "Frantoio" and "Chengku-32" during the growth and development of fruits.

We collected data of more than three thousands trees from forest inventory for 33 years to study the growth of main dominant specise. The trees included in the study are as follows: Picea purpurea, P. likiangensis, P. brachytyla, P. balfouriana, Abies faxoniona, A. georgei, A. squamata, Larix potaninii, Tsuga chinensis, Pinus tabulaeformis, P. densata, P. armandii, P. yunnanensis, P. massoniana, Cunninghamia lanceolata, Cupressus funebris, Betula albasinensis, Schirna sinensis, Cycolobanopsis glauca, Populus davidiana, Castanopsis platycantha etc.The scientific management of this forest area are discussed in the paper.

This paper suggests several models on more than two occasions to make estimators possess nice properties and simplify calculation. The relation of the estimates of population mean to difference between population mean of earlier stage and that of later stage is given. Deepgoing discussion has been done on two and three occasions. And the estimates of various plans are derived.

Chrysomyxa was establied by Unger in 1840 and 20 species have been described. Chrysomyxa himalense was described by Berkeley in 1890, Ch. succinea was described by Tranzchel in 1939, and Ch. stilbae was described by Wang and Chen et Guo in 1980.I found that the principle Characteritics of the above 3 fungi differed from Chrysomyxa in that rather than being flattened the telia are head-shaped and borne on synnmata. Therefore, the above fungi should be rejected as species of Chrysomyxa and re-established as species of Stilbechrysomyxa.In this paper Ⅰ propose a new genus, Stilbechrysomyxa, and combinations (S. succinea; S. himalense; S. stilbae). The distribution and evolution of Stilbechrysomyxa is also discussed.

Weisong sympherobiid (Sympherobius weisong Yang) discovered in Hangzhou and Ning County in Zheiiang province in recent years is one of the important natural enemies, which preys both on Matsucoccus matsumurae (Kuwana)and Matsucoccus massonianae Y. & H. It has two generations a year, but no winter diapause. The first generation occurs from April to late November. The second generation occurs from late August to June the following year. The time of its occurrence is well synchronized with that of the scale. The average amount of predation for an adult is 9 pupae or 276.6 eggs per day. A nymph might consume 2837.1 eggs for life time, and it can also prey on the nymph and adult of the scales. Observations indicated that it might exert an obvious suppression on the population of the scales. Experiments showed that its nymph and adult could be reared with eggs or pupae of the scales, eggs of rice moth, a variety of aphids or diet No. Ⅰ.

Results of the experiments are given as follows:1. Variation of the fluid permeability in wood is extremly large. Even within the same tree species the fluid permeabilities in some wood samples may be 1—1000 times higher than those of the others. 2. The permeabilities in both coniferous and broadleaved species heartwoods are much lower than those in sapwoods. The fluid permeabilities in early and late wood of an annual ring vary with tree species. Such as Pinus yunnanensis, the fluid permeability in early wood is higher than that in late wood, but on the contrary in Pinus sylvestris var. monglica. As for Pinus massoniana it has the same permeability both in early and late wood. 3. The fluid permeabilities in wood of both coniferous and broadleaved tree species are much higher in longtudinal direction than those in cross direction. The latter varies in tangential and radial direction depending on coniferous or broadleaved tree species. The fluid permeability of coniferous wood in radial direction is a little bit higher than that in tangential direction, while in broadleaved wood it is a little bit lower in radial direction than in tangential one. 4. The fluid permeability in wood has no relation with its density. 5. The gas permeability in wood does not relate to the kind of gases. For example, the permeability of air, oxygen or nitrogen in wood is almost same, but it will be decreased as the wood moisture content increases, and will be become greater as the gas pressure increases and the pressure time puts off.

The degree of relative crystallinity of the wood cellulose in the stem of Pinus massoniana Lamb. Was determined by means of X-ray diffraction and infrared spectra. The relative crystallinity (CrI%) of the fomer is 53.8%, but the infrared ratio (NO'KI and O'KI) of the latter is 0.45 and 1.12 respectively. The moisture absorptivity of the ball-milled sample exposed for seven days at 65% R.H. and at the room temperature is about 11—13%.The relative crystallinity determined by X-ray diffraction method was found simpler and more reproducible than by infrared spectra method. The correlation of X-ray diffraction with NO'KI is better than with O'KI and a few relevant regression equations are also given.

This paper introduces briefly the history of study on the forest valuation in China. A few different viewpoints and basic theories argued among forestry economists are put forward. Such as whether forest valuation exists or not, what the nature of forest valuation is, how to decide the forest land grade with it, its essential theory and the measurement way. The authors also think some focuses under discussion Will be further studied.

This article is based on the practice of production of wood in the Cutting Chances in Fujian and the calculation method of probability regression in the theory of quantization is used for developing the mathematical forecast model of the choice of the technological types of wood production in cutting chances. With the application of this model, twenty cutting chances were predicted in 1982 that the average relative error of their labour productivity is 3.39 percent and that of production cost is 3.58 percent.

Interplanting Paulownia spp. seedlings and crops can get a plantation with new population structure. The ecological environment is improved and the light, soil and space are much better utilized because of the multiple-lager management. Growth of the seedlings, biomass and the survival percent of root cuttings are also improved. So, it is a new way to produce Paulownia spp. Seedlings with better economical effects. The conflict between forestry and agriculture can be solved, and it is good way to get big harvast of both seedlings and crops.

The present paper deals with a study of the karyotype analysis of Cryptomeria fortunei Hooibrenk (Taxodiaceae). The chromosome count and karyotype of the species is reported for the first time, the number of somatic chromosomes in root-tip cell has been found to be 22, which all have metacentric centromeres. According to the terminology defined by Levan et al., the karyotype formula is therefore 2n=22=2m(SAT)+20m. Among these chromosomes, only the 11th pair possesses a secondary constriction, which is located at the short arm near the centromere. Measurements in microns of the chromosomes are given in Table 1. Photomicrographs of the chromosome complements and an idiogram of the karyotype are shown in Fig. 1 & 2 respectively. According to Stebbins, the karyotype of Cryptomeria fortunei, which is charaterized by the presence of very symmetrical chromosomes with median centro-meres, is generally considered as a rather primitive one.Upon comparing the karyotype of Cryptomeria fortunei with that of Cunninghamia lanceolata (Lamb.) Hook., it has been found that the latter belongs to Stebbins "2A" type of karyotype symmetry and should therefore be considered as a more advanced one than the former which belongs to "1A".

The two-dimension grouping method was used to select some kinds of band ratios and their combinations, which could be applied to forest classification and estimate of stocking volume. Proposed in this article was a new concept of non-linear band ratios, which, after practical application to some case, proved to have satisfactory result meanwhile, new light was cast on the mechanism of band ratio and on the role of some bands in forest, classification and in estimate of stocking volume.

Augomonoctenus Smithi is a new insect pest seriously injuring the cone and seed of Cupressus funebris in Sichuan Province. In the present paper, the distribution, severity of damage, life cycle, habits, and methods of control of this pest have been recorded preliminarily. These will be very useful to further studies on the pest.

The lady bird beetle Hyperaspis sinensis (Crotch) is one of the important natural enemies of the scal Metaceronema japonica Mask. It was observed that it had a single generation a year in Zhejiang province. The lady bird beetle can prey a great many pests. It is very effective to control these pests, so that they should be protected and used well.