0
  1. Trang chủ >
  2. Luận Văn - Báo Cáo >
  3. Báo cáo khoa học >

Báo cáo lâm nghiệp:"Net effect of competing vegetation on selected environmental conditions and performance of four spruce seedling stock sizes after eight years in Québec (Canada)" ppsx

Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp:"Net effect of competing vegetation on selected environmental conditions and performance of four spruce seedling stock sizes after eight years in Québec (Canada)" ppsx

... 691–699© INRA, EDP Sciences, 2004DOI: 10.1051/forest:2003063Original articleNet effect of competing vegetation on selected environmental conditions and performance of four spruce seedling stock sizes ... species and theirinteractions on seedling survival and growth, eight years after plantation.2. MATERIALS AND METHODSThe investigations were conducted in the Province of Québec (Canada) on two ... reachingthe mid-upper crown of four spruce seedling stock sizes during the firstfive growing seasons after planting on site 3 (black spruce and white spruce species confounded).692 R. Jobidon...
  • 9
  • 292
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "The effect of point application of fertilizers on the soil environment of spread line windrows in the Krušné hory Mts" docx

... ac-cording to characteristic absorbances in pyrophos-phate. Carbon contained in humic acids (hereinafter C-HA) and carbon contained in fulvic acids (herein- after C-FA) were detected. Based on ... se-quence of revitalization measures supported by the point application of fertilizers to forest plantations contributes to stabilization of the cycling of matter.CONCLUSION In the course of large-scale ... organomineral zone of the root balls of plants, and the condition of the soil environment on spread windrows and changes in pedochemical properties as a result of applied fertilization were...
  • 14
  • 491
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Moisture effect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast China" pptx

... of soil organic matter of those 4 elevations (Table 1). e partial in uence of elevation and as-sociated vegetation type and the effect of moisture-elevation interaction on C0 and C0k indicated ... is maintained at 20°C. For the given vegetation type of Changbai Mountain, soil C and N mineralization rate, potential mineralizable C (C0) and potential rate of initial C mineralization (C0k) ... analysis of GLM program) showed that on all days of incubation both the soil moisture and elevation significantly affected the rates of soil C mineralization during the period of incubation J....
  • 9
  • 555
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "The effect of liming on the mineral nutrition of the mountain Norway spruce (Picea abies L.) forest" docx

... monitoring of forest conditions after liming is required.ere exist a lot of data on the liming effect on the soil chemistry changes but data on the liming effect on the mineral nutrition of ... stand which was limed in the past years and in a spruce stand which was not limed in order to compare the liming effect on the mineral nutrition of spruce stands.METHODResearch on the mineral ... effect of liming on the carbon and nitrogen nutrition of the spruce stand was determined.The content of calcium, magnesium and phos-phorus in current needles during dormancy was always higher on...
  • 8
  • 503
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "The effect of excess nitrogen and of insect defoliation on the frost hardiness of bark tissue of adult oaks" pot

... Further inves-tigations are necessary for a betterunderstanding of the underlying physiolog-ical mechanisms.The findings of adverse effects of ampleN supply and of spring ... (Durham)65, 1087-1092Aronsson A (1980) Frost hardiness in Scots pine (Pinussilvestris L). lI. Hardiness during winter and spring in young trees of different mineral nutrient status. ... (Sakai and Larcher, 1987).Since insect defoliation is one of the pri-mary causal factors of oak decline in north-ern Germany, and since the majority of oakstands investigated...
  • 12
  • 238
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "The effect of nitrogen content on the of Scots pine needles and shoots photosynthesis" doc

... mineralnutrition on carbon dioxide exchange and parti-tioning of carbon in trees. In: Nutrition of Plan-tation Forests. (Bowen G.D. & Nambiar E.K.S.,eds.), Academic Press, London, ... densitydecreased with increasing nitrogen con-tent (Fig. 4) and the needle angle increa-sed with increasing nitrogen content (Fig.5). In conclusion, nitrogen content canincrease shoot ... Suonenjoki Research Station, SF-77600 Suonenjoki, and 2 University of Helsinki, Department of Silviculture, Unioninkatu 40 B, SF-00170 Helsinki, FinlandIntroductionA close dependency...
  • 3
  • 250
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "delayed effect of ozone fumigation on photosynthesis of Norway spruce" ppt

... results of an investigation intothe long-lastincl effects of ozone fumiga-tion upon photosynthesis of Norway spruce. Measurements were conducted in the field 6-7 mo after ... Carbon dioxideassimilation and growth of red spruce seedlings in response to ozone and precipitation chemis-try and soil type. Oecologia (Berlin) 70, 163-171Discussion and ... time of ozone fumigation. The data presented in this paper show that ozone increased A in the spring prior to budburst following asummer of ozone fumigation. Ozonedecreases...
  • 5
  • 192
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Aboveground biomass relationships for mixed ash (Fraxinus excelsior L. and Ulmus glabra Hudson) stands in Eastern Prealps of Friuli Venezia Giulia (Italy)" pptx

... predictions should be based on nonlinear functions[13, 18]. So, in the second step, the two parameters in equation (1) weredetermined performing a non-linear regression by a modified Gauss-Newton ... arethe same of Table IV. SS is the sum of squares for error in arithmetic unit. In this case a and b and the coefficient of determination (R2) werecalculated using a nonlinear interpolation (see ... marginal land abandonment has been followed byafforestation and reforestation of former agricultural areas witha net increase of 14.9% of the forest area in Italy during the lastfifty years...
  • 6
  • 311
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp:"Wind-firmness in Pinus pinaster Aït. stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged during the 1999 storm" pdf

... thelevel of leaning pines decreases. This relation may be thetranslation of the interaction between stand effect and tree effect on wind-firmness. In dense plots, the crowns are in closecontact and ... Maritimepine stands” contract associating INRA, AFOCEL, CPFA and ONF.Moreover, the Aquitaine region has financed the study “Pine and wind: from the study of stability to the analysis of the effects of ... fertilisation on growth is still visible 26 years later although it was onlyapplied once at 25 years of age. The gain in terms of circumference and, above all, in terms of height is maintainedover...
  • 18
  • 283
  • 0
Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp:"Inter-regional variability in site index models for even-aged stands of stone pine (Pinus pinea L.) in Spain" potx

... analysis and 37 permanent plots in even-aged stands of stone pine (Pinus pinea L.) in four regions of Spain(Central Range, Northern Plateau, West Andalusia and Catalonia) are used to develop a dominant ... 10.1051/forest:2003017Original articleInter-regional variability in site index models for even-aged stands of stone pine (Pinus pinea L.) in SpainRafael Calamaa*, Nieves Cañadasb and Gregorio Monteroaa ... reasoning is used by Johansson [20],Duplat and Tran-Ha [11], and Elfving and Kiviste [12].4.2. Interregional comparisonA graphical comparison among regional site index curves(figure 3) indicates...
  • 11
  • 404
  • 0

Xem thêm

Từ khóa: chuyên đề điện xoay chiều theo dạngMột số giải pháp nâng cao chất lượng streaming thích ứng video trên nền giao thức HTTPNghiên cứu vật liệu biến hóa (metamaterials) hấp thụ sóng điện tử ở vùng tần số THzBiện pháp quản lý hoạt động dạy hát xoan trong trường trung học cơ sở huyện lâm thao, phú thọGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitĐỒ ÁN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWANĐỒ ÁN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWANNghiên cứu, xây dựng phần mềm smartscan và ứng dụng trong bảo vệ mạng máy tính chuyên dùngNghiên cứu tổng hợp các oxit hỗn hợp kích thƣớc nanomet ce 0 75 zr0 25o2 , ce 0 5 zr0 5o2 và khảo sát hoạt tính quang xúc tác của chúngĐịnh tội danh từ thực tiễn huyện Cần Giuộc, tỉnh Long An (Luận văn thạc sĩ)Thiết kế và chế tạo mô hình biến tần (inverter) cho máy điều hòa không khíSở hữu ruộng đất và kinh tế nông nghiệp châu ôn (lạng sơn) nửa đầu thế kỷ XIXChuong 2 nhận dạng rui roKiểm sát việc giải quyết tố giác, tin báo về tội phạm và kiến nghị khởi tố theo pháp luật tố tụng hình sự Việt Nam từ thực tiễn tỉnh Bình Định (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 15: Tiêu hóa ở động vậtGiáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtGiáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtBÀI HOÀN CHỈNH TỔNG QUAN VỀ MẠNG XÃ HỘIChiến lược marketing tại ngân hàng Agribank chi nhánh Sài Gòn từ 2013-2015QUẢN LÝ VÀ TÁI CHẾ NHỰA Ở HOA KỲ