您要查找的是不是:
- Effects of grazing intensity on plant diversity and aboveground biomass of Stipa baicalensis grassland. 放牧对贝加尔针茅草原群落植物多样性和生产力的影响。
- S ratio (belowground to aboveground biomass ratio) has been widely used for estimating root biomass. 利用根冠比(R:S)和地上生物量来估算地下生物量是目前常用的方法,但目前缺乏根冠比的数据。
- Aboveground biomass dynamics, biomass growth rate and plant growth rate of Phragmites corn-mums were studied . 对吉林省西部地区芦苇地上部生物量的动态、生物量增长速率、植株的生长速率等进行了研究。
- The principle component 1 in Carex lasiocarpa could explain the species relative density of 88% and the aboveground biomass of 84%. 毛果苔草湿地中主成分1能够解释88%25的物种相对密度和84%25的地上生物量;
- The principle component 1 in Deyeuxia angustifolia could explain that the relative density and the aboveground biomass were 75% and 58% respectively. 小叶章湿地中主成分1对相对密度和地上生物量的解释量则分别为75%25和58%25.
- We harvested the aboveground biomass of our cut treatment and control plots of M. micrantha once every two months for a year. 根据全年的定期监测资料分析可知,连续的刈割导致薇甘菊群落物种组成和功能均有较大改变;
- The ratio between underground biomass and aboveground biomass of shrub and herb layer increases first, and then decreases with the rising of elevation. 灌木层、草本层地下部分与地上部分的比值随海拔的升高均呈先增加后减少的趋势。
- The result shows that the aboveground biomass of the shrubland is 16.77 t/hm2,less than 1/3 of that of evergreen broad-leaved young forest. 结果表明该区次生灌丛的地上部分生物量为16.;77 t/hm2,还不到常绿阔叶林幼林生物量(地上部分)的1/3。
- We found that there was a significant correlation between aboveground biomass density and the maximum annual NDVI when expressed as a power function (R 2=0.71, p<0.001). 结果表明 :草地植被地上生物量与当年最大NDVI值具有很好的相关关系 ;两者可以用幂函数很好地拟合 (R2 =0 .;71;p<0
- The results show that the aboveground biomass of evergreen broadleaf young forest, secondary shrub thicket and shrub-grassland were respectively 61.74, 16.83 and 5.28 t/ha. 结果表明:黟县常绿阔叶幼林、次生灌丛和灌草丛的地上部分为81.;74、16
- This paper analyse plant composition,aboveground biomass,the proportionof good grasses and nutrient element in soil at different degraded grassland in Dari county,Guoluo, Qinghai. 研究分析退化草地的植被组成、地上生物量、优良牧草比例、高原鼠兔密度以及土壤理化性质等特征,探讨“黑土型”退化草地的成因及生态过程。 结果表明,中度退化草地生物量最高(50.;3g/0
- Through comparative study of AGR and RGR, it was further testified that later management of the first crop had an important effect on formation of total aboveground biomass. AGR与RGR的比较可进一步证明一茬草后期的管理对草群总生物量的形成具有重要的作用。
- There are 2.15 species per square meter,the coverage was 4.41%and aboveground biomass was 11.28g/m2.The mainly harmful species to the grassland were Oxytropis ochrocephala,O. 平均2.;15种/m2,盖度达4
- Yearly and seasonal changes in aboveground biomass and soil water of cultivated Old World bluestem (Bothriochloa ischaemum) grasslands in different habitats were compared. 对半干旱黄土丘陵区不同立地条件下白羊草Bothriochloaischaemum人工草地的生产力与土壤水分状况进行比较研究。
- There was positive correlation between aboveground biomass and heating field, while there was not significant relationship between belowground biomass and heating field. 地上生物量季节变化与热源强度具有显著的正相关关系,而地下生物量季节变化与热源强度关系不明显。
- Ninety square meters in Longdong forestry centre were investigated in December 2004, and aboveground biomass of twelve square meters plots was harvested. 结果表明,这种多年生木质藤本植物的无性繁殖能力极强,带根茎比例高,生存策略明确,目前未发现其天敌。
- The harvest method is used to study plant aboveground biomass of Castanopsis sclerophylla + Quercus fabri shrubland in Tiantong region,Zhejiang Province. 采用直接收获法研究了浙江天童地区苦槠+白栎次生灌丛群落的地上部分生物量。
- The objective was to test how similarity in species composition can explain the effects of species diversity on interannual variability in total aboveground biomass. 而随着均匀度的增加,生物量的变异性尽管在均匀度中等程度时似乎保持在同一水平,但总体上呈下降趋势;
- Results show that the precision of the estimation of aboveground biomass is high using the GRNN model.The model is stable and less affected by the correlation among variables. 研究得出,用广义回归神经网络模型估测地上生物量整体相对精度很高,模型具有较强的稳定性,受变量间的相关性影响小。
- The biomass of P.flaccidum community in June and July was studied. The result showed that the aboveground biomass in June and July was 90.97 g/m 2 and 95.02 g/m 2 respectively; the underground biomass was 324.00 g/m 2 and 452.61 g/m 2 respectively. 研究了黄土区白草群落6月和7月的生物量,测定结果:6月和7月地上生物量分别为90.;97g/m2和95