The yield increasing range of three-year and above terrace is 27.07%~52.78% with corresponding WUE 1.01~3.38 kg/(mm·hm~2) higher than that of dry-slope land.
The seasonal AGR changes of switchgrass at each habitat were double-apex curves. Maximum AGR of standing and total biomass were 158.93 and 169.83 kg/(hm~2·d) for lowland 27.31 and 38.25 kg/(hm~2·d) for terrace, and 37.0 and 36.69 kg/(hm~2·d) for slope land.
The combination proportions in different types of erosion areas are seen as 18% to 25% for terrace, 45% to 55% for the planted forest, 20% to 25% for planted grass, 5.5% to 7.5% for the dam land and 0.5% to 2.7 % for the irrigated land in the 1 st and 2nd sub-region.
By chemical analysis of the groundwater from different depths of loess tableland,Zaohe river terrace and Cuihua mountains in the south of Chang′an,the change of pH values,conductivities and content characteristic of K~+、Na~+、Ca~(2+)、Mg~(2+)、HCO~-_3 and the reasons in the groundwater have been studied.
Through edition and emulation under the environment of the Altera company EDA software terrace the MAX+PLUS Ⅱ, this hardware electric circuit description is downloaded to the CPLD device to program, to realize the course of control of the traffic light system.
the three different planting densities,1.5m×1.5m,1.5m×2m,and 2m×2m produce little difference on height,diameter growth and thecrown size of the sapling; for the steep Slope above 30’c terrace tending is better thanrhomboid tending,fan一shap tending as wellas spot tending,and all the four tending method can produce obvious different result compared with the check methods。
From the palaeosoil profile acquired from the overlying loess, the authors found that the forming of the layer S8 (date 0.75 MaBP), layer S5 (date MaBP) and layer S1 (date 0.13 MaBP) corresponds respectively with the three large scale regressions of the basin while L 1SS was developed at the time when the Fen River cut deeply and formed T2 terrace.
Regional geochemical fields in Anhui province are closely related with regional tectonics respectively and manifest following characteristics: In northern area of this province geochemical fields of Cu, Pb, Cr and Co reflect the geochemical features of carbonatite terrace sediments and ophiolite or greenstone belt at the south margin of the Sino-Korean Para-platform;
The frontal surface of the mosaic (scales located side by side) and terrace cuticle (steps between scales) varies in different species from smooth to rib-folded.
It has been found that the numbers of bacteria reach a peak in calcareous peat soil under forest near the floodplain terrace, decreasing to a minimum in soddy alluvial soil near the riverbed.
Fouling and paludification of near-shore shoals of the lake, as well as peat deposits formation on the first lake terrace and in paleodeltas were found to be typical of the end of Atlantic and the beginning of the Subborreal Period of Holocene.