检索结果-南通市图书馆

Effects of Crude Oil Contamination on soil physical and chemical properties in Momoge Wetland of China

Chinese Geographical Science 2013年第6期23卷 708-715页

作者： WANG Ying FENG Jiang LIN Qianxin LYU Xianguo WANG Xiaoyu WANG Guoping Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Key Laboratory for Wetland Ecology and Vegetation Restoration of National Environmental Protection Northeast Normal University Department of Oceanography & Coastal Sciences School of the Coast and EnvironmentLouisiana State University

Large oilfields are often coincidentally located in major river deltas and wetlands,and potentially damage the structure,function and ecosystem service values of wetlands during oil *** the present study,the effects of crude oil contamination during oil exploration on soil physical and chemical properties were investigated in marshes of the Momoge National Nature Reserve in Jilin Province,*** concentrations of total petroleum hydrocarbons in the marsh soil near the oil wells are significantly higher than those in the adjacent control *** water contents in oil-contaminated marshes are negatively correlated with soil temperature and are significantly lower than those in the control area,especially in *** oil contamination significantly increases the soil pH up to8.0,and reduces available phosphorus concentrations in the *** concentrations of total organic carbon are significantly different among sampling ***,crude oil contamination could potentially alkalinize marsh soils,adversely affect soil fertility and physical properties,and cause deterioration of the marshes in the Momoge National Nature ***-remediation by planting Calamagrostis angustifolia has the potential to simultaneously restore and remediate the petroleum hydrocarbon-contaminated *** oil contamination affects the soil physical and chemical properties,so developing an effective restoration program in the Momoge wetland is neccesary.

关键词： crude oil contamination marsh soil oilfield in marshes soil physical and chemical properties wetland Momoge National Nature Reserve

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

soil physical and chemical properties of Five Subtropical Forests in Lingao of Hainan

引用

Agricultural Science & Technology 2017年第8期18卷 1459-1464页

作者：薛杨宿少锋王小燕林之盼海南省林业科学研究所海南海口571100

With 5 types of typical forests as research object, the physical and chemical properties of different types of forests were analyzed by sample plot investigation method. The results showed that： the soil total porosity was the highest in the Casuarina equisetifolia forest （46.168%）, but the lowest in the Encalyptus robusta forest （39.46%）. The soil capillary porosity was the highest in the Acacia mangium forest （22.57%）, but the lowest in the secondary forest （18.95%）. The soil water content was the highest in the C. equisetifolia forest, with a mean value of 27.85%, but the lowest in the secondary forest, with a mean value of 4.34%. The soil pH values were in the range of 4.81-6.59, the soils in the A. mangium forest, C. equisetifolia forest and E. robusta forest were strongly acidic （pH 4.5-5.5）, and the soils in the secondary forest and C. nucifera forest were weakly acidic. The soils had organic matter contents in the range of 0.34-28.68 g/kg, and showed an order of A. mangium forest〉C. equisetifolia forest〉E. robusta forest〉secondary forest〉C. nucifera forest, with a decreasing trend with the soil depth increasing. The soil total N contents were in the range of 0.10-1.63 g/kg, the A. mangium forest showed the highest soil total N contents, while the C. nucifera forest exhibited the lowest soil total N contents; the soil total P contents were in the range of 0.21-1.74 g/kg, and the E. robusta forest had the highest soil total P contents; and the soil total K contents were in the range of 0.16-2.15 g/kg, and the A. mangium forest exhibited the highest soil total K contents. The soil available P contents were in the range of 0.98-132.46 mg/kg; and the secondary forests had the highest soil available P contents; and the soil rapidly available K contents were in the range of 3.03-27.35 mg/kg, and the C. nucifera forest exhibited the highest soil rapidly available K contents. The soil ammonium N contents were in the range of 1.38-5.15 mg/kg, and the nitrate N content

关键词： Lingao County Coastal platform Different forest types soil physical and chemical properties Comparison

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Robinia pseudoacacia leaves improve soil physical and chemical properties

引用

Journal of Arid Land 2010年第4期2卷 266-271页

作者： Babar KHAN Abdukadir Ablimit Rashed MAHMOOD Muhammad QASIM World Wide Fund for Nature Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences COMSATS Institute of Information Technology

The role of the leaves of Robinia pseudoacacia L., which is widely distributed in the arid lands, on improving soil physical and chemical properties was analyzed at various incubation periods. The incubated soils added with 0, 25, 50 and 75 g Robinia pseudoacacia leaves were tested after consecutive incubation intervals of 6, 8 and 10 months and the different soil parameters were measured. The results showed the increases in organic matter (OM), extractable K, cation exchange capacity (CEC), aggregate stability and water holding capacity, but the decreases in pH value and bulk density after 6 months’ incubation. The gradual decrease in change rates of soil properties indicated less microbial population and organic residual mineralization under acidic conditions, which were resulted from fast decomposition of leaves after the first 6 months incubation. The increases in soil organic matter content, extractable K, CEC, aggregate stability and water holding capacity and the decreases in soil pH and bulk density provide favorable conditions for crop’s growth.

关键词： soil physical and chemical properties Robinia pseudoacacia Gilgit-Baltistan

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Invasive effects of Ageratina adenophora Sprengelon soil microbial community and soil enzyme and physical and chemical properties

Invasive effects of Ageratina adenophora Sprengelon soil mic...

引用

第二届全国生物入侵学术研讨会

作者： LI Hui-Na~(1,2),LIU Wan-Xue~2,WAN Fang-Hao~(2*),CAO Yuan-Yin~1 (1 College of Plant Protection of Shenyang Agriculture University,Shenyang 110161 2 Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100081)

To explore the effects of Ageratina adenophora Sprengel(Asteraceae) on soil ecology,soil microbial communities were analyzed using PCR-DGGE,the activities of 3 enzymes and 8 soil physical and chemical factors were measured following A adenophora *** to non-invaded site and native plant site,invasion of *** modified soil microbial community *** was most noticeable that *** increased soil organic carbon,NO3-N, NH4-N,available P,available K content and the activities of urase,neutral phosphatase,alkaline phosphatase and *** quantity of soil fungi,azotobacteria,ammonia oxidizing bacteria were most abundant in heavily invaded *** azotobacteria,ammonia oxidizing bacteria and urase, phosphatase were significantly associated with most of the measured soil physical and chemical *** examined bacterial community composition in soil following Ageratina adenophora invasion in China using PCR-DGGE method which can detect variation of microbial gene diversity in *** results of DGGE bands showed that *** had changed the soil bacterial communities,especially the soil nutrition cycling and soil enzyme related soil microbe groups, probably creating favorable soil environment to benefit *** invasion-induced changes of soil microbial community and physical and chemical properties may be used by *** to expand rapidly in invasive ranges.

关键词： Ageratina adenophora exotic plant activity of soil enzyme soil physical and chemical properties soil microbial community

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Effects of Green Manure Mixed Cropping Patterns on physical and chemical properties of soil and Economic Characters of Flue-cured Tobacco

引用

Agricultural Science & Technology 2015年第8期16卷 1723-1727页

作者：陈治锋邓小华周米良田峰张明发中国烟草中南农业试验站湖南长沙410128 湖南省烟草公司湘西自治州公司吉首416000 湖南农业大学农学院湖南长沙410128

[Objective] The aim was to clear the suitable green manure cropping pat- terns in Xiangxi tobacco-planting areas. [Method] 8 treatments were set to study the effects of the monoculture and mixed cropping of common vetch （Vicia gigantea Bge.）, perennial ryegrass （Lofium） and rapeseed （Brassica campestris L.） on physi- cal and chemical properties of soil and economic characters of flue-cured tobacco. [Result] （1） Green manure turnover can reduce soil bulk density by 1.08%-8.62%, and the effect of green manure mixed cropping pattern was the best. （2） Green manure turnover also can increase the soil nutrient, soil organic matter, total nitro- gen （N）, total phosphorus （P）, total potassium （K）, alkali-hydrolyzale N, rapidly available P and rapidly available K by 1.44%-6.10%, 0.01-0.12 g/kg, 1.89%- 11.32%, 0.12%-3.56%, 1.06%-11.76%, 0.04%-18.93% and 0.98%-23.12%, respec- tively, and the effect of the monoculture of common vetch was the best.（3） The overall change of soil pH was not obvious.（4）Green manure turnover can increase the yield and output of flue-cured tobacco, and the effect of the monoculture of common vetch was the best. [Conclusion] The monoculture of common vetch can be generalized in the dry land of Xiangxi tobacco-planting areas.

关键词： Green manure Mixed cropping soil physical and chemical properties Economic characters of flue-cured tobacco

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ecological effect of the plantation of Sabina vulgaris in the Mu Us Sandy Land,China

引用

Journal of Arid Land 2024年第1期16卷 14-28页

作者： NAN Weige DONG Zhibao ZHOU Zhengchao LI Qiang CHEN Guoxiang School of Geography and Tourism Shaanxi Normal UniversityXi'an 710062China Shaanxi Key Laboratory of Ecological Restoration in Shaanbei Mining Area Yulin UniversityYulin 719000China College of Prataculture Gansu Agricultural UniversityLanzhou 730070China

Vegetation restoration through artificial plantation is an effective method to combat desertification,especially in arid and semi-arid *** study aimed to explore the ecological effect of the plantation of Sabina vulgaris on soil physical and chemical properties on the southeastern fringe of the Mu Us Sandy Land,*** collected soil samples from five depth layers(0-20,20-40,40-60,60-80,and 80-100 cm)in the *** plantation plots across four plantation ages(4,7,10,and 16 years)in November 2019,and assessed soil physical(soil bulk density,soil porosity,and soil particle size)and chemical(soil organic carbon(SOC),total nitrogen(TN),available nitrogen(AN),available phosphorus(AP),available potassium(AK),cation-exchange capacity(CEC),salinity,p H,and C/N ratio)*** results indicated that the soil predominantly consisted of sand particles(94.27%-99.67%),with the remainder being silt and *** plantation age increased,silt and very fine sand contents progressively *** 16 years of planting,there was a marked reduction in the mean soil particle *** initial soil fertility was low and declined from 4 to 10 years of planting before witnessing an *** positive correlations were observed for the clay,silt,and very fine sand(mean diameter of 0.000-0.100 mm)with SOC,AK,and p *** contrast,fine sand and medium sand(mean diameter of 0.100-0.500 mm)showed significant negative correlations with these *** findings ascertain that the plantation of *** requires 10 years to effectively act as a windbreak and contribute to sand fixation,and needs 16 years to improve soil physical and chemical ***,these improvements were found to be highly beneficial for vegetation restoration in arid and semi-arid *** research can offer valuable insights for the protection and restoration of the vegetation ecosystem in the sandy lands in China.

关键词： Sabina vulgaris plantation age soil physical and chemical properties soil particle size soil fertility vegetation restoration Mu Us Sandy Land

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Production Benefits of Double-Cropping Rice Under Optimized Application of Nitrogen and Potassium Fertilizers Combined with Chinese Milk Vetch and Straw Co-Returning to Fields

引用

Agricultural Science & Technology 2021年第1期22卷 17-25页

作者： DONG Chun-hua MA Chao-hong HU Ke-xin HE Yun-long LI Wan-min CHU Fei YANG Zeng-ping Hunan Institute of soil and Fertilizer Changsha 410125PRC Institute of Plant Protection and soil Fertilizer Hubei Academy of Agricultural SciencesWuhan 430064PRC Agricultural Technology Extention Center of Anxiang County Anxiang 415600PRC

In order to explore the technology and effects of reducing nitrogen and potassium fertilizer applications in double-cropping rice,a field plot experiment was conducted to study the effects of optimized application of nitrogen and potassium fertilizers combined with returning Chinese milk vetch and straw to fields on yield,fertilizer utilization efficiency,net photosynthetic rate(Pn),stomatal conductance(Gs),intercellular CO_(2) concentration(Ci),chlorophyll content(SPAD value)and soil physical and chemical properties in late rice harvest *** results showed that the optimized application of nitrogen and potassium fertilizers combined with the integrated technology of Chinese milk vetch and straw co-returning to the field could enhance the photosynthetic efficiency of double-cropping rice,increase rice yield,and enhance soil biological activity,especially T4 treatment involving the returning of Chinese milk vetch and straw to the field instead of 30%nitrogen fertilizer achieved the highest rice yield,fertilizer use efficiency,net photosynthetic rate and soil biological *** with the conventional fertilization treatment T2,the total rice yield of T4 treatment increased by 4.1%,among which the early rice and late rice increased by 6.3%and 2.4%,respectively;Pn,Gs and SPAD values of flag leaves at full heading stage significantly increased,and the contents of soil active organic carbon,alkali hydrolyzed nitrogen,available phosphorus and readily available potassium significantly increased.

关键词： Double-cropping rice Optimized application of nitrogen and potassium fertilizers Chinese milk vetch and straw co-returning to fields Rice yield soil physical and chemical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of Once Fenlong Cultivation on soil properties and Rice Yield and Quality for 7 Consecutive Years

引用

Agricultural Science & Technology 2017年第12期18卷 2365-2371页

作者：韦本辉甘秀芹李艳英申章佑周灵芝周佳刘斌劳承英胡泊广西壮族自治区农业科学院经济作物研究所广西南宁530007

[Objective] The objective of this study was to explore the long-term effect of Fenlong cultivation for one time. [Method] The physical and chemical properties of soil and rice yield and quality were investigated and determined by measuring the soil at the depth of 23 cm in the paddy field with Fenlong cultivation and 16 cm of control （conventional farming） for 7 years. [Result] Compared with the control, the average yield of early rice of the Fenlong cultivation increased by 1 972.5 kg/hm2 of the first year, an increase of 23.87%, and milled rice and protein increased by 15.95% and 14.61%, while the increase rates of organic matter, available nitrogen, available phosphorus and available potassium per hectare were 74.58%, 67.01%, 104.41% and 129.62%, respectively. In the 7th year after Fenlong cultivation, the yield increased by 234 kg/hm2 from the control, an increase of 3.21%, and milled rice and protein increased by 0.5% and 0.14%, while the increase rates of organic matter, available phosphorus and available potassium per hectare were 745.8%, 62.635 and 73.37%, respectively, and the increase rates of total nitrogen, total phosphorus and total potassium were 46.03%, 50.58% and 36.65%, respectively. During the 7 years after Fenlong cultivation, the yield increased by 3.21-23.87%, and its average net income per season increased by 1 843.61 Yuan/hm2 with a gain of 18.03%. [Conclusion] At the 7th year after Fenlong cultivation, the paddy field still had the furrow remain at a depth of 22 cm, which was 46.67% thicker than the traditional one. The yield and quality of paddy rice increased for 7 consecutive vears showed that Fenlon.q cultivation was highly feasible for paddy field.

关键词： Paddy field Fenlong cultivation soil physical and chemical properties Yield Quality

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：