However, the reserves of calcium bentonite is low and the surfactants are expensive, which bring many difficulties to industrialization.

Effect of Calcium Bentonite on Growth Performance of Meat-Type Ducks

日粮中膨润土的使用对肉鸭生产性能的影响

互联网摘选

Meantime, the study of the modification of calcium bentonite was made.

同时，对钙基膨润土人工钠化进行了研究。

互联网摘选

A large calcium bentonite mine is found recently in Nanhai Guangdong. It is first in Guangdong that the bentonite mine is used synthetically.

广东省南海膨润土矿是近年发现的大型钙基膨润土矿，是广东省首个被综合开发利用的膨润土矿。

互联网摘选

In order to improve the ballability of iron ore concentrates of Kun-Steel, the effect of calcium bentonite and sodium bentonite on the ballability of iron ore concentrates were compared in this paper.

为改善昆钢铁精矿的造球性能，对昆钢球团添加钙基膨润土和钠基膨润土进行了对比试验。

互联网摘选

By using clay, bentonite, cement, fly ash, colliery powder addition agent as raw materials in this paper, the performance of common material for grouting were studied to solve practical problems of common slurry and find the reasonable dispensation formula meeting requirements of different projects.

本文利用粘土、膨润土、水泥、粉煤灰、煤矸石粉和其它外加剂为原材料，研究注浆工程中常用浆液的性能，解决常用浆液实际存在的一些问题，找到满足不同工程要求的合理配比。

互联网摘选

Marine benthos are characterized by narrow activity and special territory distribution and can be used to indicate the quality of water and the polluted condition of sediments, which plays an important part in the biologic indication of marine pollution.

海洋底栖动物活动性小、地区性强，可以较好地反映水质和底质的污染状况，在海洋污染生物学指标中具有特别重要的意义。

互联网摘选

Study on marine benthos in an organically polluted intertidal beach of Qingdao Bay ii. the pollution ecology of meiobenthos

青岛湾有机质污染潮间带底栖生物研究Ⅱ.小型底栖动物生态特点

互联网摘选

Samples of sediment, overlying water, pore water, and benthic invertebrate were collected at13 stations along a typical municipal polluted river in the Pearl River Delta.

研究区域为珠江三角洲一条典型城市污染河道，采集了13个站位沉积物、上覆水、间隙水及底栖动物样品进行分析。

互联网摘选

Investigation of periphyton and benthic invertebrate communities at six sections of Suzhou creek and biological evaluation of corresponding sections have been conducted.

对苏州河7个断面的着生生物和底栖生物群落的调查及其相应断面的水质生物学评价，结果表明：1.选取着生生物和底栖生物这两个项目能较好反映苏州河的水质状况；

互联网摘选

This paper reports the biological assessment of water quality in the reaches polluted by floatation agent by means of community structure and behavior response of benthic invertebrate.

利用大型底栖动物的群落结构及其行为反应对有毒化合物&浮选剂污染河段水质进行评价，并提出了受浮选剂污染的污水生物系统评价标准。

互联网摘选

Investigation and Evaluation of Periphyton and Benthic Invertebrate Communities in Suzhou Creek

苏州河着生生物、底栖生物群落的调查与评价

互联网摘选

Ecological assessment of the Yangtze River eco-system with benthic invertebrate as indicator species

以底栖动物为指示物种对长江流域水生态进行评价

互联网摘选

The formation of benthic invertebrate groups in the Western River at the suburb of Nanchong city is discussed.

本文讨论了南充市郊西河水域底栖无脊椎动物区系组成。

互联网摘选

The paper also emphasized the zoology index that belongs to ecosystem instinctual characteristic and introduced the estimate methods that used algae, benthic invertebrate and fish as indicator.

着重阐述了系统本身特性中的生态指标，列举了以着生藻类、底栖无脊椎动物和鱼类为指示生物的评价方法。

互联网摘选

We conclude that there is a strong correlation between the benthic fauna and environmental factors, and also for the benthic species composition, density and environmental factors.

从而得出底栖动物与主要环境因子相关系数都很高，底栖动物物种组成、密度与主要环境因子间的相关性都很强。

互联网摘选

Study on toxicity test of benthic fauna, Bullacta exarata, polluted by copper in the tidal flat of Changjiang Estuary

长江口滨岸潮滩底栖动物泥螺受铜污染的毒理学研究

互联网摘选

This shows that the accumulation of Cu in benthic fauna is a dynamic process, and it occurs to cooperate with the different heavy metals.

这说明底栖动物对重金属的富积是个动态的过程，金属间具有一定的协同作用。

互联网摘选

Studies on intertidal zone ecology of the benthic fauna in Xiangshan Harbor and Sanmen Bay ──ⅲ. community structure

象山港、三门湾潮间带生态学研究&Ⅲ.群落结构

互联网摘选

Studies on the benthic fauna community structure of the intertidal zone of rocky shore in Zhoushan waters

舟山岩相潮间带动物群落结构的研究

互联网摘选

Application of Exergy as an indicator in the restoration of benthic fauna communities

Exergy作为生态学指标用于底栖动物群落恢复监测

互联网摘选