Electrophysiological and Behavioral Responses of Adult Anoplophora glabripennis（Mostschulsky）to Volatile Components of Host—Plant

Electrophysiological and behavioral responses of adult A.glabripennis(Motsch.)to volatiles from ashleaf maple (Acer negundo L.) were investigated to identify semiochemicals involved in host location.Measurable electroantennogram(EAG) responses were elicited to all compounds tested,the most effective antennal stimulants were trans-2-hexen-l-al,decyl aldehyde and trans-2-hexen-1-ol.These profiles were similar between males and females.In Y-tube olfactometer bioassays,above three compounds with certain concentration,trans-2-hexen-1-al(1%),trans-2-hexen-1-ol(1%) and decyl aldehyde(10%),were significantly attractive to the adults in laboratory.The results show that either EAG or olfactory responding to a particular volatile compound are markedly influenced by the concentration.     

Host Preference by Monochamus alternatus (Hope) during Maturation Feeding on Pine Species and Masson Pine Provenances

Host preferences pine of the sawyer beetle, Monochamus alternates (Hope), during maturation feeding on 8 conifer trees and 40 masson pine provenances, were investigated using 3 types of laboratory bioassay of consistent feeding preference, feeding area and visitation frequency. M. alternatus adults have the highest frequency of feeding and prefer to feed on the branches of P. massoniana and P. densiflora and had significant host selectivity on 8 conifer trees in the area of Nanjing. The adult feeding visitation frequencies were 1 ~3 adults per branch. Maturation feeding areas were much larger on P. massoniana and P. densiflora than on P. taeda, P. elliottii, Juniperus virginiana and Cunninghamia sinensis. After initial selection tests, 12 provenances of masson pine had smaller maturation feeding areas. The second and third selection results showed that 12 provenances and six provenances also had consistent reductions in feeding by M. alternatus. The three provenances Fujian 2, Guangdong 5 and Guangdong     

Study of the Digestive Rate of Coarse Cellulose of Giant Pandas

IntroductionBal11booisl11ainfoodoftl1cgial1tpal1daint`.ildal1dman-fedgiantpandattasfCd111ucl1bal11boobcsldcsconccntratestl1atx`erel11adcofgrainPOwdcrtokccpltsfeedingl1abitsinwiId,buttl1cdigestivcratcofcoarsccclluloseisvery'low,il1botl1ttilda11d111a11-fcdpa11das.Wecanfindthattl1eba111boot'asall11ostl1otdigcstcdfrolllthefCccsthatcol1tai11edl11ucI1bal11boosticks.CI1cl1Yucllulletc.(l993)rcPortedt1lattl1edigcstit'eratcil1bal11boocoarsecelluloscisabout25%ol1lv.Tl1cautl1orsdesiglledthiscxPCrilll…     

Analysis of Nutrition Composition of Schisandra Fruits

IntroductionSchiSandraisadeciduousvineofMopohaceae.ItsthetStaSteofsWed,sour,bitter,PepPeryandsalty.ItisoneOfthetfadihonalChineseherbalmedicine.Schisan-for(Mopohaceae)hasbeenusedasprecioustonicandastriopntdrugforalleviahngcoughsinceanc1enthme.Modemmedicine…     

Evaluation of the sustainability of participatory management of forest plantations: the case study of Wari-Maro Forest Reserve,Republic of Benin§

This study assessed ecological and socio-economic impacts of a participatory forest management project in the Republic of Benin. The study focused on the Wari-Maro Forest Reserve and the ‘Projet d’Aménagement des Massifs Forestiers’ five years after its completion. A forest inventory was carried out using 37 square plots of 729 m² each to characterise the population structure of two types of plantations established: plantations with exotic species and plantations with native species. In addition, individual surveys were conducted with local households, organs of joint forest management and forestry officers to evaluate their perceptions about the participatory management of the plantations. Finally, the sustainability of the participatory management was assessed with an established rating system. Results showed that plantations with exotic species were more successful than plantations with native species. Local communities argued that they have not been involved in the plantations design but only in the implementation step and that their standards of living have decreased after the project completion. The rating system used showed that the participatory management of plantations had a short-term sustainability. The findings suggest that future projects should be designed and implemented with better participation of local communities as full partners.     

Ultrasound-associated extraction of seed oil of Korean pine

Experiment on ultrasound- associated extraction of seed oil of Korean pine (Pinus koraiensis) was conducted in Northeast Forestry University, Harbin, China. The factors affecting extraction yield, such as ultrasonic frequency, extracting temperature, extracting time and the ratio of material to liquid (ratio of Korean pine seed to absolute alcohol), were analyzed under specific condition and the optimal extracting parameters were obtained as the ultrasonic frequency 32 000 Hz, the extracting temperature 80℃, the extracting time 50 rain, and the ratio of material to liquid 1: 30. The study demonstrates that ultrasound is a reliable and great efficiency tool for the fast extraction of Korean pine seed oil。     

Analysis of Sediment Source of Watershed in Western Shanxi of the Loess Plateau

1 INTRODUCTIONThe Loess Plateau is the most drastic soil erosion regionin China, with the most severe water erosion. Thedistribution of types and intensity of erosion not onlyhave regional diversity but also have perpendicularvariation. In the small watershed, there are differencesin erosion characters among its upper, middle and lowerreaches. It is very significant for taking rationalmeasures of soil and water conservation and forpreventing soil and water loss to analyze the relationbe…     

Evaluation of Strength Performance of Finger-jointed Lumbers Using Three Kinds of Nondestructive Techniques

Resonance flexural vibration（Fast Fourier Transform, FFT）, ultrasonic wave（Pundit） and stress wave（Metriguard） techniques were examined as means of evaluating the static modulus of elasticity （MOE） and predicting the modulus of rupture （MOR） of finger-jointed lumber specimens made with four kinds of Eucalyptus （Eucalyptus. citriodora, E. exserta, E. grandis x E. urophylla and E. grandis）. Dynamic MOE was calculated from frequency and time obtained from forced vibrations and sounds induced in the four species of finger-jointed specimens. It was found that correlation coefficients between density and static MOE and dynamic MOE were statistically significant at the 0.01 level. And it was also found that the three nondestructive techniques can provide rapid and accurate means to determine the MOE, and the dynamic MOE was more accurate to predict static MOE than density. But the correlation coefficient between dynamic MOE, static MOE and MOR were lower than results reported by other researchers for solid wood, and were not statistically significant. It can be concluded that the three nondestructive techniques are useful for evaluating the MOE, but not suitable for predicting the MOR of finger-jointed.     

A Survey of Laoshan Experimental Station of Plantation

GeneralInf0rmati0nLaoshanExperimentalStationofPlantation,knownasakeyexperimentalbaseofplantationofNortheastForestryUniversity,wasestablishedinl958.ItislocatedonShangzhiCountyof'HeilonaiiangProvince,45"20,-45"25'in1atitudeand'l27o30,-l27o34'inlongitude.Themeanelevationisabout300In-ThehighestpeaknamedMaoershanis800minelevationralativeheight.Thes1opeinthisregionrangesfroml0"to15",andtheterrainisachainofundu1atedhills.Vegctati0nThezonalvegetationofthisregionisbroadleavedandkoreanpinemixedfO…     

A Study of Eco-service Valuation of Saihanba Forest

The study made a monetized valuation of eco-service provided by forests at Saihanba Mechanic Forest Farm in terms of water conservancy, soil conversation, carbon sequestration, micro-climate adjustment, air quality improvement, protection for agriculture, biodiversity maintenance, and landscape recreation. The results revealed that the total value of various eco-services is 3.061 billion yuan/a, while the eco-services of unit area forest values at 42 300 yuan/(ha·a).     

A Study of Collecting Robot of Conifer Cone

IntroductionIntheforeStp~tion,thecollectionofconifcrconeisalmpsadifficultProblem.AlthoughmanykindsofconecoleCtinmachinehavebeenresearchedandmanufac-~athomeandabroad,forexample,elevator,vibra-tionmachineoftrdetrunkandsoon.ThesemachincshavcnotbeenaPPliedwid…     

Simulation of Landscape Pattern of Old Growth Forests of Korean Pine By Block Kriging

IntroductionLandscapecanbeconsideredaspatiaI1yheterogeneousarea,andspatialpatter11referstothearra11gementofstructurall1eterogeneityofenvironments,resourceandbiologicalsysteInsinspace(Formanetall986,Tur11erl987,l989-Risserl987,TurneretaI199l).Turner(1987,1…     

Bulk Method of Hardwood Cutting Propagation of Larix olgensis

Introducti0nChangbaiLarch(LarixolerI1sis).traditionaIIy,isaspeciesbyseedpropagation.ltdosenotconsistentIyproduceseedsinhighyieIdeveryyear-sothatl1ighqualityseedsfroIntheseedorchardscannotmeetlheneeds0freforestati0ninlargearea.Forthisreason,astudyoPcutting…     

Impact of Drying Methods on Wettability of Populus tomentosa

Plantation poplar is one of the most important resources for wood industry, its utilization field is vast. The wettability of Populus tomentosa with different drying methods was judged by measurement of contact angle using distilled water in this paper. The results showed that the specimens from conventional drying have the biggest contact angle, and the air dried have the smallest contact angle, air dried lumbers have a better wettability than the kiln dried. The changes of contact angle in a period of tim...     

Computerized simulative method of three dimensions outline of log

lntroduCtionlnthewoodworkingprocess,itisusualIynecessarytodeterminethebest-orientedcenterofIog-whichisespeciaIlyimportantforpeelingbIocks-Howmuchpercentagerecoveryisconsideredtobethejudge-mentifitisthebestIogcenter,soitisnecessarytofindoutthemaximuminscribedcylinder.Therefor,themainproblemofIogcenteringistodescribethreedimensionsoutlineoflog.ThisworkisSupiortedbyNaturalScienceFoundationofHeilongjiangProvinceMethodsltisnecessarytoscanIogatseveraIcross-sectionsandmanydifferentpointsinorder…     

Corrosiveness of Copper-based Preservatives to 4 Types of Metals

The corrosive rates of 4 types of metals as well as epoxy-coated metal in a variety of preservatives derived from different copper sources and ingredients were .measured in this paper. The main results show that： CCA is less corrosive to red brass and Q235A steel than other copper formulations; Copper-based preservatives such as ACQ and CuAz derived from basic cupric carbonate or cupric hydroxide are much less corrosive to Q235A steel than those from cupric sulfate; Ethanolamine is less corrosive to Q235A steel than ammonia in ACQ derived from cupric hydroxide, while other ingredients are the same; Epoxy resin coating could be used for protecting red brass, Q235A steel and zinc hotdipped galvanized mild steel from corrosion.     

Effect of ectomycorrhizal fungi on bacterial wilt of Eucalyptus

Bacterial wilt caused by Pseudomonas solanacearum, is a very serious disease of Eucalyptus in southern China, mainly in Guangdong, Hainan and Guangxi provinces. It causes the death of seedlings and young trees and the mortality may exceed 90 percent in some sites. Susceptible species include E. grandis, E. urophylla, hybrids between the two and E. citriodora. In nursery and field trials with E. urophylla and field trial with E. grandis x E. urophylla inoculation of ectomycorrhizal fungi was found to reduce the incidence of the disease. Some fungal isolates were more effective than others.     

Evaluation of nutrient value of seabuckthorn in north China

Five minerals or elements, crude protein, lysine, methionine cystine, calcium and phosphorus, were selected for evaluation of the food value of seabuckthorn (Hippophae rhamnoides ssp. sinensis) using the method of "food analysis". The decision values (δi) of seabuckthorn seeds, leaves and fruit residues rank in the fifth, sixth and ninth position among the 16 types of fodder. Seeds, leaves and fruit residues of seabuckthorn are suitable for livestock and poultry fodder. The weights of livestock and poultry are considerably increased after feeding with seabuckthorn. The development of seabuckthorn should have great potentials as food, pre-food and food additives for livestock and poultry in north China. Processing facilities should pay more attention to seabuckthorn food development methods and strategies and the seabuckthorn fodder industry should be promoted.     

To Authors and Readers of Journal of Forestry Research

DearcolleagueScientificperiodicalisamainkindofmediumforpublishingscientificresearchresutts.Aboutseventypercentofresearchresultsarepublishedindifferentformsofperiodicals.Thereareabout260kindsofforestryjournalsinChina.Thesejournalsareplayinganimportantroleinadvancingacademicexchangesandflourishingforestryresearch.Mostofthesejoumals,however,arepublishedinChinese,somewithEnglishabstracts,veryfewpublishedinEnglish.SothescopeofacademicexchangesofforestryresearchislimitedinChina.NortheastForestry…