查询词典 biomass

The soil depth of 30～40 cm could be taken as a shift depth of the vertical distribution of Phragmites communis belowground biomass.

基于2005年4～9月盘锦湿地芦苇生态系统的观测资料，分析了盘锦湿地优势植物芦苇的群落学特性。

Our work reported here are aiming at improving nitrogen and water use efficiency in wheat/maize, faba bean/maize, pea/maize and soybean/maize intercropping through field experiment.The main results obtained were as the following:(1) Land equivalent ratio was greater than 1.0 for faba bean (Viciafaba L.)/maize (Zea mays L.) intercropping regardless of nitrogen fertilizer application or not. Based on grain yields production, LER of pea (Pisum sativum L.)/maize intercropping was over 1.0 in spite of nitrogen fertilizer application, while LER was higher than 1.0 only when nitrogen fertilizer was applied based on biomass production. However, LER in soybean (Glycine max L.)/maize intercropping was smaller than 1.0 both nitrogen applicationa and no nitrogen application. In wheat Triticum aestivum L.

本文通过田间试验，对小麦／玉米、蚕豆／玉米、大豆／玉米和豌豆／玉米间作种植下作物对氮素和水分利用的影响进行了系统比较，获得的主要结果如下：(1)蚕豆／玉米间作的土地当量比都大于1；豌豆／玉米间作以籽粒产量为基础的LER无论施氮还是不施氮都大于1，而以生物学产量为基础的LER只有施用氮肥时才大于1；大豆／玉米间作无论施氮还是不施氮LER均小于1。

Community structure of planktonic crustacean in the Xiqi river,Hangzhou including species composition,population dynamics and biomass,was studied .

本文研究了杭州西溪河浮游甲壳动物的种类组成、种群动态、生物量及其与环境因子的关系。

This article analyzes the significance and the method of the evaluation of the forest carbon-sink,taking the artificial planta- tion of the Three-north shelterbelt forest system program as an example,uses the variable BEF (Biomass Expan- sion Factor) method to assess the value at the Three-north shelterbelt forest carbo.

对森林碳汇价值评价意义和方法进行了分析，并以三北防护林体系工程人工林为例，采用换算因子连续函数法对三北防护林的碳汇价值量进行了评价，提出了持续开展三北工程、提高人工林固碳能力的对策建议。

Based on morphologic and biomass measurement comparisons of morphology and resource allocation of Plantago major and P. depressacollected in the same environment have been made. The results show that quantitative relationships and resources allocations between different modules are proper in different species, they can reflect unprejudicedly ecological characteristics of individuals.

本文通过对取自同一生境条件下的两种车前属植物，即大车前和平车前(P 。depressa)不同构件间的形态学特征和生物量相关关系的比较分析，发现构件间的数量关系和各构件在资源配置上具有种间特异性，各构件生物量间的数量关系及各构件在资源配置上的数量关系，更能真实地反映出物种个体的生态学特征。

By high density sampling and farming household investigation,total N content,microbial biomass N content,total N and MB-N relationship,and N cycle characteristics and N balance of plowable soil layer under different land-use types were studied in Dongting Lake region.

通过对洞庭湖典型地区的密集采样分析和农户调查，研究了4种利用方式耕作土壤全N、微生物生物量氮含量、两者关系和N素循环特征。

The paper presents a systematic study on the fine clone biomass of the five se-lected populus.

对入选的5个毛白杨优良无性系的生物量进行了系统研究。

After doing a simulation burning experiment on 18 kinds of straw residue which are common fuel for biomass power plant, the result shows that straws ash content is 9.33% generally and its composite are mostly composed of Silicate(25.85％), Calcium(23.34％), Potassic(17.47%).

对于生物质发电厂常用的18种秸秆燃料进行的高温（550℃）模拟燃烧实验表明，秸秆的平均灰分含量为9.33%，秸秆灰分的主要组成为大量不能直接利用的硅酸盐（含量为25.85%）、钙盐（含量为23.34%）以及钾的化合物（含量为17.47%）。

Succinic acid is an important C4 platform chemical. Utilization of non-food biomass instead of starch for succinic acid production by fermentation does not threaten grain provisionment and can reduce the cost of substrate.

丁二酸是一种重要的碳四平台化合物，利用非粮生物质替代淀粉制备丁二酸可保证粮食安全并降低原料成本。

On the assumption that the three main components in biomass underwent individual thermo-degradation, a multi component kinetic model was developed. The parameters in the model were obtained by thermogravimetric analysis of Pterocarpus indicus.

基于生物质的组分独立热分解的假设建立了多组分反应动力学模型，并依据花梨木的试验数据得到了优化后的纤维素、半纤维素和木质素的热裂解动力学参数。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。