Association between Genetic and Bioacoustic Distances of Tettigoniidae Species (Orthoptera: Tettigonioidea) in the Northeast of China

2021 ◽  
Vol 147 (4) ◽  
Author(s):  
Qi Chen ◽  
Xue Zhang ◽  
Xiaoyan Zhu ◽  
Hamza Rehman ◽  
Ming Wen ◽  
...  
Keyword(s):  
Northeast Of China

Ecological Adaptability of Zhengdan 958 Hybrid in Northeast of China

2010 ◽  
Vol 36 (2) ◽  
pp. 296-302 ◽  
Author(s):  
Cai-Yun BAI ◽  
Shao-Kun LI ◽  
Hou-Bao ZHANG ◽  
Jun-Hua BAI ◽  
Rui-Zhi XIE ◽  
...  
Keyword(s):  
Ecological Adaptability ◽  
Northeast Of China

scholarly journals The effect of climate change on the climatic regionalization of wine grapes in Northeast of China

2020 ◽  
Vol 559 ◽  
pp. 012008
Author(s):  
Yanjun Wang ◽  
Yashan Li ◽  
Xueqiu Wang ◽  
Yulin Fang ◽  
Xu Liu ◽  
...  
Keyword(s):  
Climate Change ◽  
Wine Grapes ◽  
Climatic Regionalization ◽  
Northeast Of China

Impact of Long-Term Organic Fertilizer Application on Lignin in Mollisol

2010 ◽  
Vol 113-116 ◽  
pp. 1332-1335 ◽  
Author(s):  
Ning Liu ◽  
Hong Bo He ◽  
Hong Tu Xie ◽  
Zhen Bai ◽  
Xu Dong Zhang
Keyword(s):  
Organic Carbon ◽  
Organic Fertilizer ◽  
Fertilizer Application ◽  
Carbon Pools ◽  
Organic Fertilization ◽  
Degradation Degree ◽  
Northeast Of China ◽  
The Impact ◽  
Cuo Oxidation

Fertilization is one of the essential managements to maintain and increase soil organic carbon (SOC) level in agroecosystems. It has been realized that fertilizer applications influenced the turnover of labile and refractory organic carbon pools in arable soil markedly. However, the dynamic of relatively refractory lignin in response to fertilization is still kept unclear. Therefore, the impact of long-term organic fertilization on the content and degradation degree of lignin in Mollisol was investigated. Lignin monomers were released by alkaline CuO oxidation method and quantified by gas chromatography (GC). At the time scale of decades, lignin was clearly accumulated in soil and the relative accumulation of lignin in SOC was evident after long-term organic fertilizer application. Compared with the unfertilized soil, lower acid to aldehyde ratios of vanillyl and syringyl units induced by organic fertilization suggested a lower degradation degree of lignin incorporated into soil to some extent. It could be concluded that long-term organic fertilization was an effective fertilizer practice for lignin accumulation in soil and SOC sequestration in Mollisol in northeast of China.

Preliminary Ideas of the Metro Station Constructed by Shield Tunneling Method Combined with Prefabricated Method

2014 ◽  
Vol 580-583 ◽  
pp. 1013-1018 ◽  
Author(s):  
Hui Feng Su ◽  
Wei Ning Liu ◽  
Fu Chun Liu
Keyword(s):  
The Other ◽  
Shield Tunnel ◽  
Spring Stiffness ◽  
Underground Engineering ◽  
Shield Tunneling ◽  
Metro Station ◽  
Key Technology ◽  
Tunneling Method ◽  
Assembly Technology ◽  
Northeast Of China

Confronting with the difficulties of the construction metro station in the Northeast of China, a new idea of shield method combined prefabricated method is put forward. In the paper the research status of the underground engineering precast assembly technology was analyzed and classified firstly. The method of single round interval shield combined with open-cut (or covered excavation) prefabricated sections and on the basis of shield tunnel to build single arch station is especially worth studying and promotion. Then the key prefabricate theory needing to deal with such as how to calculating the spring stiffness and so forth of the calculating model. The key technology such as joint formation, waterproof and the other of shield method combined with prefabricated method was discussed.

The microstructures of butterfly wing scales in northeast of China

2007 ◽  
Vol 4 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Li-yan Wu ◽  
Zhi-wu Han ◽  
Zhao-mei Qiu ◽  
Hui-ying Guan ◽  
Lu-quan Ren
Keyword(s):  
Butterfly Wing ◽  
Northeast Of China ◽  
Wing Scales

scholarly journals Interannual variability of net ecosystem carbon production and its climatic and biotic mechanism during 2005-2018 in a rain-fed maize ecosystem

2020 ◽  
Author(s):  
Hui Zhang ◽  
Tianhong Zhao ◽  
Sidan Lyu ◽  
Hang Wu ◽  
Yang Yang ◽  
...  
Keyword(s):  
Climate Changes ◽  
Daily Maximum ◽  
Spring Precipitation ◽  
Area Index ◽  
Carbon Production ◽  
Ecosystem Carbon ◽  
Spring Maize ◽  
Carbon Release ◽  
Northeast Of China ◽  
Beginning Date

AbstractThe interannual variation (IAV) of net ecosystem carbon production (NEP) plays an important role in understanding the mechanisms of the carbon cycle in the agriculture ecosystem. In this study, the IAV of NEP, which were expressed as annual values and anomalies, and its climatic and biotic controls mechanism, were investigated based on an eddy covariance dataset of rain-fed spring maize during 2005–2018 in the northeast of China. The annual NEP was 270±115 g C m−2yr −1. Annual values and anomalies of NEP were positively correlated with that of precipitation (PPT), gross ecosystem production (GEP) and daily maximum NEP (NEPmax). Annual anomalies of NEP were dominantly and positively controlled by the soil water content (SWC) through GEP and the soil temperature (Ts) through RE. In comparison, annual anomalies of NEP were dominantly and negatively controlled by summer VPD through the NEPmax, positively adjusted by spring precipitation and the effective accumulative temperature through the beginning date (BDOY) of the affecting carbon uptake period (CUP), and by autumn precipitation and leaf area index through the end date (EDOY) of the affecting CUP. Residues restrained the carbon release at the beginning of the year, and accelerated the carbon release at the end of the year. Our results hightlight that NEP might be more sensitive to the change of water condition (such as PPT, SWC and VPD) induced by the climate changes.

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