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Impacts of Integrated Multi-Trophic Aquaculture on Phytoplankton in Sanggou Bay

Journal of Ocean University of China 2024年第3期23卷 835-843页

作者： han jichang LIU Xing PAN Kehou LIU Jiaojiao SUN Yan JIN Guiyong LI Yun LI Yuhang College of Food Science and Engineering Ningbo UniversityNingbo 315832China Key Laboratory of Mariculture(Ocean University of China) Ministry of EducationQingdao 266003China Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China Laboratory of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China

Integrated multi-trophic aquaculture(IMTA)has been considered as an ecofriendly culture system providing a potential solution to environmental risks caused by intensive monoculture ***,the impact of IMTA on phytoplankton remains *** this study,the spatial and temporal variations of phytoplankton in Sanggou Bay were investigated seasonally based on 21 sampling sites covering three cultivation zones(bivalve zone,IMTA zone,and kelp zone)and one control zone(without aquatic cultivation).In total,128 phytoplankton species,with diatoms and dinoflagellates as the dominant groups,were obtained across the whole year,and the mean Shannon diversity index(H')and species richness(SR)were determined as 1.39 and 9.39,*** maximum chlorophyll a(Chl-a)(6.32μg L^(-1))and plankton diversity(H'of 1.97)occurred in summer and autumn,*** to other zones,the bivalve zone displayed significantly higher Chl-a and lower H'in majority of *** PERMANOVA analysis indicated that the phytoplankton assemblage in the bivalve zone was significantly different with the control and kelp zones,while the IMTA zone maintained close to other three *** on generalized additive models,temperature,NO_(2)^(-)-N,N/P ratio,SiO_(3)^(2-)-Si,and salinity were determined as the key factors underlying Chl-a and phytoplankton ***-tionally,the results of redundancy analysis further indicated that the phytoplankton assemblage in the bivalve zone is positively re-lated with nutrients such as NO_(3)^(-)-N and NH_(4)^(+)-N as well as water depth,while the phytoplankton assemblages in the kelp,control,and IMTA zones are associated with NO_(2)^(-)-N,SiO_(3)^(2-)-Si,and *** all observations into consideration together,it can be inferred that IMTA can effectively reduce Chl-a level compared to bivalve monoculture by reducing the ***,the SR,H’,and species composition of phytoplankton are primarily determined by local environment fa

关键词： phytoplankton diversity Sanggou Bay integrated multi-trophic aquaculture

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Sand stabilization effect of feldspathic sandstone during the fallow period in Mu Us Sandy Land

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Journal of Geographical Sciences 2015年第4期25卷 428-436页

作者： han jichang Shaanxi Provincial Land Engineering Construction Group Co. Ltd. Xi'an 710075 China Key Laboratory of Degraded and Unused Land Consolidation Engineering the Ministry of Land and Re-sources of China Xi'an 710075 China Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China

Depended on the analysis of ground snow situation, soil moisture loss speed and soil structure after planting crops of Mu Us Sandy Land remedied with feldspathic sandstone in the fallow period, it is concluded that feldspathic sandstone mixed with sand improved the sand stabilization in the governance of Mu Us Sandy Land in the fallow period. The sandy land remedied with feldspathic sandstone had big snow coverage, 25%-75% higher than normal sand; soil moisture losses slowed down, and moisture content rose by over 3 times; soil structure had been improved, and water stable aggregate content increased by 6.52%-18.04%; survival rate of protection forest increased to 85%; and ground flatness is less than 1%. The above conditions weakened sand rising conditions of Mu Us Sandy Land in the fallow period and formed two protective layers of snow cover and soil frozen layer under cold weather so as to prevent against wind erosion.

关键词： feldspathic sandstone sand stabilization Mu Us Sandy Land desertification land consolidation

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A Sand Control and Development Model in Sandy Land Based on Mixed Experiments of Arsenic Sandstone and Sand: A Case Study in Mu Us Sandy Land in China

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Chinese Geographical Science 2013年第6期23卷 700-707页

作者： WANG Ni XIE Jiancang han jichang State Key Laboratory of Eco-Hydraulic Engineering in Shaanxi Xi'an University of Technology Shaanxi Estate Development Service Corporation

Serious desertification caused by human activity and climate change,in addition to water loss and soil erosion related to arsenic sandstone in the Mu Us Sandy Land,lead to severe scarcity of soil and water resources,which causes worse local agricultural conditions *** physical properties of arsenic sandstone is complementary with that of sand,arsenic sandstone is therefore supposed to be blended to enhance water productivity and arability of sandy *** experiments are carried out to study the enhancement of water holding capacity of the mixture,the blending ratio of arsenic sandstone and sand,and the proper size of the arsenic sandstone particles,*** results of the experiments show that particle size of 4 cm with a ratio of 1∶2 between arsenic sandstone and sand are the proper parameters on *** water content and fertility increase after *** use efficiency in the mixture is 2.7 times higher than that in sand by the water release curves from ***,a new sand control and development model,including arsenic sandstone blending with sand,efficient water irrigation management and reasonable farming system,is put forward to control and develop sandy land so that water-saving agriculture could be *** of potato planting about 153.1 ha in area in the Mu Us Sandy Land in China indicates that water consumption is 3018 m3/ha in the whole growth *** means that about 61%of irrigation water can be saved compared with water use in coarse sand without *** economic mode and positive feedback of sand resource-crop planting-soil resource are constructed,which changes sand into arable soil and make it possible to develop water-saving agriculture on *** proposed model will be helpful for soil-water resources utilization and management in the Mu Us Sandy Land.

关键词： soil-water resource arsenic sandstone sand control and development model water-saving effect Mu Us Sandy Land

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Potential Role of Feldspathic Sandstone as a Natural Water Retaining Agent in Mu Us Sandy Land,Northwest China

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Chinese Geographical Science 2012年第5期22卷 550-555页

作者： han jichang XIE Jiancang ZhanG Yang Shaanxi Province Real Estate Development Corporation Xi' an 710075 China Key Laboratory of Degraded and Unused Land Consolidation Engineering the Ministry of Land and Resources of China Xi'an 710075 China Engineering Research Center for Land Consolidation of Shaanxi Province Xi'an 710075 China

This paper analyzed the water-retention mechanism of feldspathic sandstone （fine-（〈 1 mm diam.） and gravel-sized （2-3 cm diam.） in Mu Us Sandy Land, Northwest China. The objective of this study is to study the effect of feldspathic sandstone amendment on water retention in sandy land. The results showed that as the proportion of fine feldspathic sandstone in the sandy land soil increased, the soil texture changed from sand to silt loam, the capillary po- rosity gradually increased from 26.3% to 44.9%, and the soil saturated hydraulic conductivity decreased from 7.10 ram/rain to 0.07 mm/min. Feldspathic sandstone gravel formed micro-reservoirs in the sandy land soil, playing the role of a ＇water absorbent＇ and ＇water retaining agent＇ in sandy land. Amendment with feldspathic sandstone can increase water retention in the arable layer of sandy land by 67%. This study provides a theoretical basis for the amelioration of sandy land on a large scale. It can be concluded that amendment with feldspathic sandstone can improve the physical properties of sandy land soil and increase soil water retention.

关键词： feldspathic sandstone sandy land soil water retaining agent Mu Us Sandy Land soil saturatd hydraulicconductivity

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设施芹菜噻虫嗪和高效氯氟氰菊酯连续施用后消散、积累与风险评估

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农药学学报 2024年第3期26卷 604-611页

作者：黄艳萍王新全堵紫妍楚瀚樊华韩吉昌汪志威宁波大学食品与药学学院宁波315201 浙江省农业科学院农产品质量安全与营养研究所杭州310022

噻虫嗪和高效氯氟氰菊酯是设施芹菜生产中常用的杀蚜虫剂,揭示其消解和积累特征对于评估其膳食摄入风险、优化施用方式具有重要意义。本研究采用气相色谱-串联三重四极杆质谱法,在质谱多反应监测模式下,通过田间残留试验,对2种杀虫剂在... 详细信息

噻虫嗪和高效氯氟氰菊酯是设施芹菜生产中常用的杀蚜虫剂,揭示其消解和积累特征对于评估其膳食摄入风险、优化施用方式具有重要意义。本研究采用气相色谱-串联三重四极杆质谱法,在质谱多反应监测模式下,通过田间残留试验,对2种杀虫剂在3种连续施药方式(组合I:噻虫嗪+高效氯氟氰菊酯,交替II:噻虫嗪-高效氯氟氰菊酯-噻虫嗪,交替III:高效氯氟氰菊酯-噻虫嗪-高效氯氟氰菊酯)下的残留消解动态进行了分析,并对长期膳食摄入风险进行了评估。结果表明:3种连续施药方式下,均在第2次施药(定植后22 d)后原始沉积量最高,首次施药后原始沉积量最低,而芹菜叶面积指数可能是导致该现象的重要因素。根据一级动力学方程拟合获得噻虫嗪和高效氯氟氰菊酯的消解半衰期分别为2.95~3.63 d和2.33~3.11 d。连续3次施药达到安全间隔期(PHI)(7 d)后,噻虫嗪和高效氯氟氰菊酯在组合I中的残留量仅在首次施药后低于MRL (噻虫嗪:1 mg/kg;高效氯氟氰菊酯:0.5 mg/kg);而交替II中2种农药残留量在3次施药后均低于MRL;交替III中高效氯氟氰菊酯残留量在第3次施药后超过了MRL。鉴于噻虫嗪施药后可代谢为噻虫胺,本研究亦对噻虫胺残留量进行了监测,发现其在施药后3~5 d达到最大值,但在达到安全间隔期后,噻虫胺的残留量均未超过其MRL (0.04mg/kg),表明由噻虫嗪代谢导致噻虫胺残留超标的风险较低。膳食摄入风险评估结果显示:在本次于浙江绍兴进行的田间规范残留试验中,噻虫嗪和高效氯氟氰菊酯组合和交替连续施药3次,安全间隔期7 d后,所采集的芹菜样品中噻虫嗪和高效氯氟氰菊酯残留对风险商的贡献率(0.11%~3.76%)低于100%,其长期膳食摄入风险均处于可接受水平。研究表明,相较于组合施药,交替用药可在一定程度减少农药残留,而噻虫嗪-高效氯氟氰菊酯-噻虫嗪交替施用表现出最低的残留水平和膳食摄入风险贡献率,是相对最佳的施药策略。

关键词：噻虫嗪高效氯氟氰菊酯噻虫胺设施农业芹菜残留膳食风险评估

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Effects of long-term cultivation practices and nitrogen fertilization rates on carbon stock in a calcareous soil on the Chinese Loess Plateau

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Journal of Arid Land 2018年第1期10卷 129-139页

作者： CAI Miao CHEN Zhujun ZHOU Jianbin han jichang SHI Qianyun College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China Shaanxi Provincial Land Engineering Construction Group Xi'an 710075China

Soil organic carbon （SOC） and soil inorganic carbon （SIC） are important C pools in the Loess Plateau of Northwest China, however, variations of SOC and SIC stocks under different cultivation practices and nitrogen （N） fertilization rates are not clear in this area. A long-term field experiment started in June 2003 was conducted to investigate the SOC and SIC stocks in a calcareous soil of the Chinese Loess Plateau under four cultivation practices, i.e., fallow （FA）, conventional cultivation （CC）, straw mulch （SM）, and plastic film-mulched ridge and straw-mulched furrow （RF）, in combination with three N fertilization rates, i.e., 0 （NO）, 120 （N120）, and 240 （N240） kg N/hm2. Results indicate that the crop straw addition treatments （SM and RF） increased the contents of soil microbial biomass C （SMBC） and SOC, and the SOC stock increased by 10.1%-13.3% at the upper 20 cm soil depth in comparison to the 8-year fallow （FA） treatment. Meanwhile, SIC stock significantly increased by 19% at the entire tested soil depth range （0-100 cm） under all crop cultivation practices in comparison to that of soil exposed to the long-term fallow treatment, particularly at the upper 60 cm soil depth. Furthermore, moderate N fertilizer application （120 kg N/hm2） increased SOC stock at the upper 40 cm soil depth, whereas SIC stock decreased as the N fertilization rate increased. We conclude that the combined application of crop organic residues and moderate N fertilization rate could facilitate the sequestrations of SOC and SIC in the calcareous soil.

关键词： calcareous soil cultivation practices N appfication rate soil C stock Loess Plateau

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Transport Characteristics of Soil Salinity in Saline- alkali Land under Water Storage and Drainage Conditions

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Asian Agricultural Research 2015年第9期7卷 65-69 72,72页

作者： Juan LI jichang han Shaanxi Land Engineering Construction Group College of Forestry Northwest A&F University Key Laboratory of Degraded and Unused Land Consolidation Engineering the Ministry of Land and Resources of China

To test the variation and transport of soil salinity in saline- alkali land under water storage and drainage treatments,an experimental model was established in Fuping,Shaanxi Province,2009. The variation of soil salinity during 0- 160 cm soil depth under the two treatments was determined and analyzed. Results showed that the average soil water content under water storage treatment was 4. 47% higher than that under drainage treatment,which means that the water storage treatment could help to improve soil moisture to satisfy the crop's growth needs. The profile distribution of soil soluble solids( TDS),anion( Cl-,HCO3-,SO2-4) and cation( Ca2 +,Na+,K+) content and the variation of soil p H were also measured and analyzed. PCA( Principal Component Analysis) was used to explore the relationship between the soil salinity and its ions,which showed that the water storage treatment could significantly decrease the surface salinity of soil and accelerate the desalination of topsoils,and finally,the soil quality was improved significantly,demonstrating that the water storage treatment has a remarkable effect on soil salinity management.

关键词： Saline-alkali land Storage Drainage Soil salinity

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Effect of Covering-soil Thickness on Crop Growth on Bare Rock and Gravel Land in an Ecological Restoration Project

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Journal of Resources and Ecology 2018年第5期9卷 484-492页

作者： ZhanG Yang LI Zhanbin han jichang LI Peng LI Juan State Key Laboratory of Eco-hydraulic Engineering in Arid Area Xi＇an University of TechnologyXi＇an 710048China Shaanxi Province Land Engineering Construction Group CO. LTD.Xi＇an 710075China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Chinese Academy of Sciences and Ministry of Water ResourcesYanglingShaanxi 712100China

To study the mechanism by which the thickness of covering soil effects crop growth in an ecological restoration project of bare rock and gravel land,the physiological characteristics of summer maize were observed during 2010^（–2）015. This experiment was set up on exposed rock land,which had been covered by soil with six different thicknesses： 30（C30）,40（C40）,50（C50）,60（C60）,80（C80） and 100 cm（C100）. During the experiment,soil physical properties and the physiological traits and yields of crops were recorded. The results indicated several effects. 1） With the same thickness level,soil bulk density of the covering soil increased in successive planting years. There was a logarithmic relationship between soil bulk density and covering thickness. There was also a strong algorithmic relationship between covering thickness and sedimentation coefficient（R^2=0.91）. 2） The thickness of covering soil had a significant influence on both the height of summer maize,and soil and plant analyzer development（SPAD） values. In each treatment,the growth rates of the crops during the jointing and booting stages were higher than that in the booting to grain filling stage. After two years of land-use,the mean height of the crop in the C50 treatment was 8.16%,3.32%,3.31%,9.86% and 7.55% higher than that for the C30,C40,C60,C80 and C100 treatments,respectively. The differences between treatments were significant（p 0.05）. SPAD values were highest at the heading stage. The highest value for the C50 treatment was 298.41 after two years of land-use. 3） Soil thickness significantly affected yields and the water use efficiency（WUE） of summer maize. The highest average crop yield and WUE value during the experimental period for the C50 treatment were 4614.12 kg hm^（–2） and 13.57 kg hm^（–2） mm,respectively. For the C50 treatment the multi-year average water use efficiency was significantly higher than that of the other treatments in 2010-2015. In conclusion,a soil thickness of 50 cm covering the bar

关键词： soil thickness summer maize physical properties physiological characteristics

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Impacts of Integrated Multi-Trophic Aquaculture on Phytoplankton in Sanggou Bay

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中国海洋大学学报（自然科学英文版） 2024年第3期 835页

作者： han jichang LIU Xing PAN Kehou LIU Jiaojiao SUN Yan JIN Guiyong LI Yun LI Yuhang

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Study on Physical Properties and Related Spectral Characteristics of Composited Soil with Different Ratio of Feldspathic Sandstone and Sand

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Agricultural Science & Technology 2015年第8期16卷 1796-1802,1832页

作者：李娟韩霁昌陕西省土地工程建设集团有限责任公司陕西西安710075 西北农林科技大学林学院陕西杨凌710021 国土资源部退化及未利用土地工程整治研究中心陕西西安710075

[Objective] To study the soil texture, water storage and related spectral characteristics of composited soil. [Method] 3 different ratios of composited soils was designed by using feldspathic sandstone and sand by 3 different ratios, 1：1（C1）, 1：2（C2） and 1：5（C3）, and the CK used loess soil and sand by 1：2, then the soil texture, water storage, soil and winter wheat spectral characteristic were measured and analyzed under those treatments in 2010-2013. [Result] （1） With the increasing of the plant- ing year, treatment C1, C2 and C3 all showed decreasing in the proportions of sand and increasing of silt and the CK showed decreasing of clay and increasing of sand, along 1-30 cm soil depth. Treatment C2 showed the proportion of sand, silt and clay were 76.69%, 18.72% and 4.70%, respectively. （2） The water contents of all the treatments were significant different from other in 0-60 cm soil depth, and showed increasing trend with the increasing of sand proportion. Treatment C2 had higher average water content during the 3 years than treatment CK, C1 and C3 by 21.34%, 11.59% and 3.91% in the same soil depth, respectively. （3） In 2013, the spectral reflection curve characters were similar for all treatment of winter wheat at the jointing stage and filling stage along the full-wave band （350-2 500 nm）, and the reflectance was higher in the jointing stage than the filling stage; the reflection peak was found around 550 nm, a part of green light wave band. Treatment C2 showed the highest canopy that all treatments had similar spectral curves, and the relative reflectance of soil increased during 350-1 750 nm wave length along with the increase of the sand proportion; for treatment CK, C1, C2 and C3, the soil spectral reflectance （y） and wave length （x） appeared highly correlated relationships, they were y=0.18 71 In（x）-0.979 4, y=0.158 7 In（x）-0.801 2, y=0.177 1 In（x）-0.910 8 and y=0.184 5 In（x）-0.944 5, respectively. [Conclusion] Synthesizing the soil physical properties and

关键词： Feldspathic sandstone Sand Soil texture Soil water storage Spectrum characteristics

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