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These points can be estimated by introducing the soil factor (Ks) and tree species factor (Kt) to potential evapotranspiration with the Penman formula.
      
(2) Soil aeration and the soil air regime improved.
      
Three years after 50% thinning and 100% clear-cutting, the loss of carbon storage in the soil (0-60 cm) of cutover areas was 16.14 and 45.15%, respectively.
      
Carbon storage in unburnt soil (0-45 cm) reached 73.36 t/hm2, which was 15.20 t/hm2 higher than that in the soil of burnt areas.
      
A total of 20.7% of carbon storage in the soil (0-45 cm) of burnt areas was lost 40 days after burning.
      
Carbon storage in surface soil (0-15 cm) was higher than in the lower soil layer, which amounted to 30.04% (0-60 cm) and 53.52% (0-30 cm) of total carbon storage in the soil.
      
The standing crop of N in the plant community was 1,025.28 kg/hm2, accumulation in the litter layer was 224.88 kg/hm2, and reserve in the soil was 55,151 kg/hm2.
      
According to the characteristics of the biocycle of phosphorous, it was concluded that N availability in the soil of this forest was not lower, and phosphorous not N was the limiting factor in the growth of plants in this community.
      
Under artificial plantations, the vegetation layer (including roots) had a mean carbon density of 111.3 t/hm2, the litter layer a density of 5.1 t/hm2, and the soil layer a density of 64.9 t/hm2.
      
mosseae increased plant height, stem diameter, leaf area, shoot dry weight, root dry weight and plant dry weight, when the soil water content was 20%, 16% and 12%.
      
korshinski plantations to assess the effects of the shrub on the physical and chemical properties of the soil as well as enzyme activities.
      
When the soil is covered only by litter, both the maximal rainfall amount and intensity in different forest stands are different if there is no water infiltration and runoff from the ground surface.
      
The soil structure was expressed with fractal dimensions of particle size distribution (PSD), aggregate size distribution (ASD), and soil pore size distribution (SPD).
      
According to the soil infiltration process curve, the infiltration process was divided into three phases: (1) the initial phase (0-5 min), (2) the transition phase (5-30 min), and (3) the stable phase (30-180 min).
      
The soil buck density of 0-10 cm were slightly higher under canopy than that in gaps, but there was no significant difference in the soil buck density of the 10-20 cm soil layer.
      
The soil pH values were 5.80 and 5.85 in gap and under canopy, respectively, and were not significantly different.
      
This study deals with the dynamics of live, dead, and total fine roots (≤ 5 mm) biomass in the 0-30 cm soil layer using the soil core method.
      
Non-linear regression analysis shows that the soil infiltration rate is significantly correlated with time.
      
The relationship between forest growth and nutrient content in the tree leaves and the soil were analyzed.
      
Diameter at breast height (DBH) was positively related to the contents of organic matter in the soil, and the contents of N, P and K in the tree leaves had correlation coefficients of 0.967, 0.955, 0.988 and 0.972, respectively.
      
 

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