نتایج جستجو برای: pinus roxburghii
تعداد نتایج: 13401 فیلتر نتایج به سال:
Effects of thermal modification were determined relative to chemical parameters Pinus roxburghii. Thermal wood was carried out at 80, 120, 160, and 200 °C for 2, 4, 6 h. The properties different temperatures heating time. All similar except cold water soluble extractives. Among the studied, maximum mean value extractives (8.20%), hot (12.7%), holocellulose content (71.8%), ash (1.46%) recorded ...
India’s forest cover was estimated to be about 67.701 million hectares or 22.8 percent of the country’s land area and other wooded lands comprise of 4.11 million ha (UNEP Report, 2000). The dense forests in almost all the major states has been reduced and forest degradation is a matter of serious concern now. Principal plantation species such as Acacia spp., Eucalyptus spp. and Tectona grandis ...
BACKGROUND The Himalayan zones, with dense forest vegetation, cover a fifth part of India and store a third part of the country reserves of soil organic carbon (SOC). However, the details of altitudinal distribution of these carbon stocks, which are vulnerable to forest management and climate change impacts, are not well known. RESULTS This article reports the results of measuring the stocks ...
We measured water relations of 11 tree species from tropical to cool-temperate forests at 450-2310 m elevation in the central Himalaya of India, including water potential (ψ), leaf conductance (gl), osmotic potential (ψs), an index of tissue elasticity (ε), relative water content at turgor loss (RWCz), and four aspects of twig xylem conductance. We sought to determine the degree, timing, and di...
As a basic component of the forest ecosystem, structure refers to general distribution plant species different life forms and sizes. The characterization is key understanding vegetation history, present status, future development trajectory ecosystems. Chure region Nepal covers about 12.78% country’s land area extends east west along southern foothills. This biologically rich but geologically f...
Evergreen forest communities distributed within 1580-2600 m above sea level (asl) in Kumaun Himalaya were studied. Quercus leucotrichophora A. Campus, Q. floribunda Lindl. ex Rehder Q. semecarpifolia J.E. Smith and Pinus roxburghii Sarg. are the dominant tree species in banj-oak, tilonj-oak, kharsu-oak and chir-pine forests, respectively. Total density for tree, shrub and herb layer varied from...
Juvenile hormone mimics are known to prolong larval life in insects and thus sericulture, it has been shown boost good cocoon silk yield. In the present experiment, double hybrid (FC1XFC2) silkworm was utilized analysed performance of economic traits. The influence juvenile ie., phytojuvenoids from Pinus (Pinus roxburghii), Custard apple (Annona squamosa) Tapioca (Manihot esculenta), a commerci...
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