High yield cultivation of Moso forestis suitable for mixed bamboo and non-bamboo wood, and for threedimensional operation of tree-shrub-herb layers in the Guizhou Plateau. 展开 被引量: 3 年份: 2014 收藏 引用 批量引用 报错 分享 全部来源 求助全文 知网 相似文献 参考文献 引证文献...
The 1990s represented the defining decade for canopy ecology, though, arguably, the science is little more than a quarter-century old. In its early days, the literature was filled with poetic metaphors in order to capture some of our intrigue with this borderland of science. We also used this...
in a variety of characteristics, which may include tree size, accumulations of large dead woody material, number of canopy layers, species composition, and ecosystem function” (USDAFS, 1989). In the early 1990 s, Forest Service regions across the country developed more specific criteria that ...
We extracted all polygons larger than 10 ha classified as “old forest types” (=“gammelskog”), i.e., forests that have never been clearcut and are in age classes of 120 years or older. This yielded 2,103 polygons covering a total area of 0.1 Mha. Importantly, these layers were...
Positive, null, or negative normalised values indicated absolute values that were respectively above, equal, or below the site mean value (see “Data handling and normalisation” in Methods). Our results showed that the SOC pool size (forest floor plus mineral soil layers) was negatively ...
There were no differences in the aggregate size distribution among the soils with nearly half of the net aggregates being dominated by macroaggregate size WSA1, especially in the topsoil layers. Organic carbon, available P, bulk density, sand+silt and the clay fractions, and extractable Mg, Fe...
Forest ecosystems can be regarded as huge carbon sinks. In order to effectively assess carbon balance in such ecosystems, rapid and accurate estimation of the aboveground biomass of a forest is critically needed. However, the current methods for biomass estimation and mapping are of limited spatial...
The full-flow layer and zero-flow layer must be used as the calibration layers in the actual logging interpretation process in order to draw a rendezvous diagram between the cable speed and the spinner speed and then calculate the spinner response coefficient (K) and start-up speed (𝑉𝑡...
A better practice is to require at least two clicks; each additional click adds a layer of security (of course, not too many layers, as people can become desensitized...). For example, I use browser extension wallets like Rabby, MetaMask, and OKX Wallet, and except for test wallets, I...
The results showed that soil organic carbon (Corg) and total nitrogen (Nt) were strongly increased under forest and artificial shrub land compared to cropland and bare fallow land and were higher in the surface layers (0–10 cm) than in the subsurface (10–20 cm). Soil aggregate stability...