期刊：
Industrial Crops and Products,2023年204:117277 ISSN：0926-6690
通讯作者：
Zeng, BQ;Liang, Cuiyi;Qi, W
作者机构：
[Zeng, Baiquan; Long, Yu] Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha 410004, Peoples R China.;[Qi, Wei; Hu, Yunzi; Shakeel, Usama; Liang, Cuiyi; Wang, Qiong; Wang, Wen; Liang, CY; Long, Yu] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China.;[Chen, Yang] Sichuan Agr Univ, Inst Ecol & Environm Sci, Environm Coll, Chengdu 611130, Peoples R China.
通讯机构：
[Qi, W ; Zeng, BQ ; Liang, CY] C;Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha 410004, Peoples R China.;Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China.
关键词：
Combined-pretreatment;Enzymatic hydrolysis;Mechanical wet-milled;Poplar;Wet and dry properties
摘要：
In this work, the combined pretreatment of sulfuric acid and alkaline (SA), solid acid and organic solvent (SO) and phosphoric acid and peroxide (PHP) on poplar was used to thoroughly evaluate the effects of wet and dry processing on enzymatic digestibility. The finding showed a negative connection between increasing glucose yield and rising drying temperature. Moreover, research showed that wet processing is beneficial because it improve mass transfer and permeability for enzymatic liquefaction. Enzymatic hydrolysis was additionally increased by mechanical wet milling following combined pretreatment. Most importantly, SO pretreatment was superior to PHP because SO pretreatment had a stronger linear relationship between particle size and glucose yield. Wet-milled post-treatment followed by SO combined pretreatment produced an acceptable glucose yield (91.93%). In comparison to the untreated poplar, the glucose yield had an increase by 87.14%. This work offers a novel processing method that might serve as a theoretical sound foundation for the effective saccharification of poplar wood.
期刊：
FRONTIERS IN PLANT SCIENCE,2022年13:947882 ISSN：1664-462X
通讯作者：
Liu, W.;Zeng, W.
作者机构：
[Kuang, Xueshao; Hu, Jiayao; Wang, Wumin; Zeng, Wenbin; Liu, Wensheng] Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha, Peoples R China.
通讯机构：
[Liu, W.; Zeng, W.] C;College of Life Science and Technology, China
关键词：
Daucus carota;Mn accumulation;anatomical structure;Subcellular distribution;Chemical forms
摘要：
Daucus carota is a biennial herb of the Umbelliferae family, which is a candidate plant for the phytoremediation of Mn pollution. To reveal the mechanism of this plant to adapt to Mn stress, plant growth, anatomical structure, Mn accumulation characteristic, Mn subcellular distribution, and chemical forms of D. carota under six Mn2+ concentrations by pot culture experiments were studied. The results showed that with the rising Mn concentrations, the total dry weight and leaf area of D. carota increased firstly and then decreased, while the specific leaf area increased. The thickness of the main vein, upper epidermis, and lower epidermis; the thickness of the palisade tissue; and the thickness of the spongy tissue of the leaves increased firstly and then decreased. The Mn content in the aboveground and underground parts of D. carota increased, and the values of the bioconcentration factor (BCF) and translocation factor (TF) were higher than 1. The Mn existing in the cell wall and soluble components accounted for the largest proportion, and the proportion of Mn in the cell wall increased with increasing concentrations of Mn. In addition, Mn mainly existed in ethanol extraction state, deionized water extraction state, and sodium chloride extraction state. The results showed that D. carota could alleviate the damage caused by high manganese concentration by storing most of manganese in the cell wall and vacuole and existing in the form of low-activity state.
摘要：
With the deepening of the concept of sustainable development, people have become more and more aware of the important role of the ecological environment in human development. To protect and build the ecological environment, the harmony between man and nature has become the common choice of all countries in the world. As a means of adjusting the relationship between stakeholders in the use, protection and construction of the ecological environment, and maintaining and improving ecosystem services, ecological compensation has received increasing attention from all over the world. The theoretical research and practice of ecological compensation has become a hot research issue in the 21st century. one. Payment for ecosystem services is an institutional arrangement for the purpose of protecting and sustainable use of ecosystem services, and adjusting the interests of stakeholders based on economic means. It is aimed at protecting the ecological environment and promoting the harmonious development of man and nature. Value, ecological protection cost, development opportunity cost, and the use of government and market means to regulate the public system of interest relations between stakeholders in ecological protection. According to the status quo of Dongting Lake Eco-Economic Zone and the ecological environment, this study constructs a regional ecological compensation standard model, evaluates the value of ecosystem services and other indicators, determines the objects of regional ecological compensation, and builds a framework of regional ecological compensation mechanism. Introduce a coordination degree model to study the relationship between the construction of an ecological compensation system and the government's ecological purchase mechanism. The research results show that the regional ecological compensation mechanism framework has a certain degree of operability. The compensation model should be based on the government ecological purchase mechanism, supplemented by market compensation, and adopt multiple methods to implement regional ecological compensation scientifically.
关键词：
Complex planting and breeding;Greenhouse gas;Methane;Rice-duck
摘要：
Integrated rice-duck farming (IRDF) has proven to decrease methane (CH4) emissions due to increased dissolved oxygen caused by duck bioturbation. The duck bioturbation, however, also causes many bubbles of CH4 that were overlooked in previous studies. Therefore, it is uncertain whether IRDF could decrease CH4 emissions. We hypothesize that the effect of IRDF on CH4 emissions is related with the intensity of duck bioturbation. We simulated duck's disturbance (trampling and foraging) by stirring and aerating the surface soil in flooded rice fields. Three treatments were disturbed with an interval of 12 h (D12), 24 h (D24), and 48 h (D48), respectively, with non-disturbance as the control (CK). CH4 emissions as bubbles during the disturbance period (CH4-A) were investigated. Besides, CH4 emissions were investigated every 2 h (CH4-B), which lasted for 4 days during the rice elongation stage. Compared with CK, D12, D24, and D48 decreased CH4-B emissions by 17.1%, 14.0%, and 10.1%, respectively. However, the CH4-A emissions under D12, D24, and D48 were equivalent to 14.2%, 14.0%, and 11.9% of CH4 emissions under CK, respectively. On the whole, simulated duck bioturbation had limited effects on the reduction of total CH4 emissions.
通讯机构：
[Wang, Hui; Zhao, Yunlin] C;Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.
关键词：
g-C3N4 nanosheets;BiFeO3;Cr(VI) photoreduction;Heterojunction;Electrolyte ion
摘要：
A novel ternary composite of graphitic carbon nitride (g-C3N4)/graphene oxide (GO) sheets/BiFeO3 (CNGB) with highly enhanced visible-light photocatalytic activity toward Cr(Vl) photoreduction is prepared and characterized. The characterization and photocatalysis experiments corroborate its reasonable band gap, efficient charge separation and transfer, widened visible-light adsorption, easy solid-liquid separation, good stability and superior catalytic activity of CNGB. Three CNGB samples with different ratios of g-C3N4 and BiFeO3 (CNGB-1, -2, -3 with 2:4, 3:3, and 4:2, respectively), though possessing different adsorption ability, eventually remove all Cr(Vl) ions via photocatalysis within 90 min. The catalytic efficiency of the composite is the highest at pH 2; increases in pH decrease the catalytic ability. The inorganic anions such as SO4-, Cl-, and NO3- only slightly affects the photocatalytic process. The matching of the band structure between BiFeO3 and g-C3N4 generates efficient photogenerated electron migration from the conduction band of g-C3N4 to that of BiFeO3, which is also facilitated by the electron bridging and collecting effects of GO, and holes transfer from the valence band of BiFeO3 to that of g-C3N4, yielding the efficient separation of photogenerated electron-hole pairs and the subsequent enhancement of photocatalytic activity. The research provides a theoretical basis and technical support for the development of photocatalytic technologies for effective application in wastewater treatment and Cr-contaminated water restoration. (C) 2018 Elsevier Ltd. All rights reserved.
摘要：
<jats:title>Abstract</jats:title><jats:p>This study provides a complete account of global warming potential (GWP) and greenhouse gas intensity (GHGI) in relation to a long-term water management experiment in Chinese double-rice cropping systems. The three strategies of water management comprised continuous (year-round) flooding (CF), flooding during the rice season but with drainage during the midseason and harvest time (F-D-F), and irrigation only for flooding during transplanting and the tillering stage (F-RF). The CH<jats:sub>4</jats:sub> and N<jats:sub>2</jats:sub>O fluxes were measured with the static chamber method. Soil organic carbon (SOC) sequestration rates were estimated based on the changes in the carbon stocks during 1998–2014. Longer periods of soil flooding led to increased CH<jats:sub>4</jats:sub> emissions, reduced N<jats:sub>2</jats:sub>O emissions, and enhanced SOC sequestration. The net GWPs were 22,497, 8,895, and 1,646 kg CO<jats:sub>2</jats:sub>-equivalent ha<jats:sup>−1</jats:sup> yr<jats:sup>−1</jats:sup> for the CF, F-D-F, and F-RF, respectively. The annual rice grain yields were comparable between the F-D-F and CF, but were reduced significantly (by 13%) in the F-RF. The GHGIs were 2.07, 0.87, and 0.18 kg CO<jats:sub>2</jats:sub>-equivalent kg<jats:sup>−1</jats:sup> grain yr<jats:sup>−1</jats:sup> for the CF, F-D-F, and F-RF, respectively. These results suggest that F-D-F could be used to maintain the grain yields and simultaneously mitigate the climatic impact of double rice-cropping systems.</jats:p>
作者机构：
[Jilie L.; Wei W.; Yuefei Y.; Yaohui W.] College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
[Wei, W.] C;College of Life Science and Technology, China
