arenaceous是什么意思

网络释义

用法例句

Study on the Relationship between Species Diversity and Productivity of Sandy Grassland Communities in Horqin Sandland;

科尔沁沙质草地物种多样性与生产力的关系

Based on a series of field investigations,in this paper the characteristics of vegetation in a degenerated sandy steppe in Horqin Sandland are compared.

采用经典统计和地统计学的方法,定量分析了放牧与封育沙质草地植被盖度、丰富度、平均高度、密度和Shannon-Wiener指数的变化及其对植被空间结构特征的影响。

Experimental study on oil in water adsorbed by sands;

沙质滩涂吸附水中油的实验研究

Plant community succession of degradation and desertification in sandy grassland.;

沙质草原植物群落退化与沙化演替

The effect of protecting Artemisia frigida communities on preventing sandy grassland desertification was studied.

草原退化和沙质草原的沙漠化在其演替进程的前一半是完全一样的 ,对沙质草原来说 ,到了冷蒿阶段如果不注意保护令其继续破坏 ,由于植被盖度下降 ,地表裸露而极易受到风蚀、水蚀作用 ,形成沙漠化土地 ,因此 ,冷蒿阶段是一个十分重要的阶段 。

The sediment quality guidelines for waters by the National Oceanographic and Atmospheric Administration (NOAA) of USA are employed to evaluate degree of sediment contamination by the heavy metals and arsenic, and the standar.

利用《地表水环境质量标准》(GB38382002)和美国国家海洋大气管理局(NOAA)水体泥沙质量标准等分别对水体和底泥中的重金属(砷)和氮磷污染进行了评价。

Sediment quality in waters not only affect the benthic organism, but also has close relation with the water quality due to the frequent pollutant interchanges between the sediment and overlaying water.

水体沉积泥沙质量不仅对底栖生物具有影响 ,而且由于泥沙与上覆水体相互间频繁的交换作用 ,泥沙质量与水体水质也有着密切的关系 ,污染的泥沙往往会成为水域的潜在污染源。

high grazing(6 sheep · hm-2,H),moderate graz-ing(4 sheep · hm-2,M),light grazing(2 sheep · hm-2,L) and control(0 sheep · hm-2,C) were settled in korqin sandy pasture.

在科尔沁典型沙质草地,设置不同放牧强度的4块样区:重牧区、中牧区、低牧区和封育对照区。

Effects of nitrogen addition on soil nitrogen availability in sandy grassland;

添加氮素对沙质草地土壤氮素有效性的影响

Soil respiration,carbon balance and carbon storage of sandy grassland under post-grazing natural restoration;

不同强度放牧后自然恢复的沙质草地土壤呼吸、碳平衡与碳储量

By comparing the grass productivity and plant characteristics in early 1980s and early 2000s in Naiman County in Horqin Sandy grassland, we analysed the degradation of sandy grassland which existed in this place.

为探讨沙质草地退化的原因,以便为植被恢复与重建奠定科学基础,在调查对比20世纪80年代初期与21世纪初期,科尔沁地区奈曼旗沙质草地生产力和植被特征等方面变化的基础上,通过对奈曼旗1963-2002年40年来气候变化特征以及1947-2002年56年来畜牧业发展状况的研究,综合剖析了导致该地区沙质草地退化的根本原因。