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Copyright of Electric Machines & Control / Dianji Yu Kongzhi Xuebao is the property of Electric Machines & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Water Conservancy & Electric Power Technology & Application is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mechanical & Electrical Engineering is the property of Mechanical & Electrical Engineering Magazine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Urban Architecture & Development is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Tiangong University is the property of Journal of Tianjin Polytechnic University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to study phytoplankton community distribution features of the source of the Yellow River and their response to environmen tal factors, phytoplankton community structure and environmental factors at 3 stations in Jinan section of the Yellow River main stream were investigated and analyzed in May,August and November 2014 and May, September and October 2015. The phytoplankton biodiversity index was used to evaluate the water quality of the Yellow River main stream and the density and environmental factors of the dominant phytoplankton species were analyzed by canonical correspondence analysis. The results show that among the hydration indexes of Jinan section of the Yellow River trunk stream, pH, DO, TP, NH4 + and COD are better than that of class III standard and TN is inferior to class III standard. There are 49 species of phytoplankton were detected, belonging to 5 families, 6 classes, 12 orders and 17 genera, including 25 species of diatoms, 12 species of chlorophyta, 8 species of cyanobacteria, 3 species of euglenophyta and 1 species of cryptophyta. The number of phytoplankton species at each site shows the trend of summer > autumn > spring, H1 is bigger than H2 and H3 in space. The quantity of phytoplankton in each station is not evenly distributed in space and time, showing the trend of summer > autumn>spring in time, H1 is bigger than H2 and H3 in space. The water quality of the river was evaluated by the indicator biological method. CCA results of phytoplankton community composition and environmental factors show that the distribution of phytoplankton community structure is mainly affected by turbidity (SS), water temperature (Temp), alkalinity (ALK) and pH. [ABSTRACT FROM AUTHOR]

Copyright of Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

【Objective】To clarify the mechanism of different weed control modes on soil fertility and find out an ecological method for controlling weeds in vegetable garden, yields of green onion and the biological characteristics of rhizosphere soil under different treatments for weed control were analyzed.【Method】The green onion was used as the test object, and three treatments for weed control were designed as following: no weeding(CK), manual weeding(T1), and mulching with sawdust(T2). Based on traditional and high-throughput sequencing techniques, yield of green onion and the soil biological characteristics of rhizosphere under three treatments of weed control were analyzed.【Result】T2 Treatment significantly increased the amount of cultivable bacteria and fungi in rhizosphere soil of green onion, which increased by 20.79 % and 33.34 %, respectively. However, there was no significant effect on the amount of cultivable actinomycetes. The activities of β-glucosidase and aminopeptidase in rhizosphere soils of green onion were significantly increased by T2 treatment, but there was no significant effect on the activity of phosphatase; Meanwhile, the microbial biomass carbon and nitrogen in rhizosphere soil of green onion were also significantly increased by T2 treatment, and there was no significant effect on microbial biomass phosphorus too; Under different treatments of weeds control, the bacterial abundance indexes of ACE and Chao, showed a trend with T2>T1>CK; By contrast the bacterial diversity index of Simpson showed a trend with CK>T1>T2, These results indicated that the indexes of richness and diversity with soil bacteria can be improved by T2 treatment. At the phylum level, Acidobacteria, Chloroflexi, and Bacteroidetes bacteria in rhizosphere soil of green onion could be increased by upper treatments for weeds control, which increased with 28.08 %, 7.53 % and 74.59 %, respectively; At the Genus level, Pseudomonas was significantly reduced in T1 and T2 treatments, which reduced with 486.00 % and 925.00 % in comparing with CK.【Conclusion】The method of mulching with sawdust for weeds control not only improved the yield of green onions, but also improved the fertility in rhizosphere soil of green onion. It indicates that the method of mulching with sawdust is an ecological method for weeds control and suits for large-scale application in Southern China. [ABSTRACT FROM AUTHOR]

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)