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Temporal variation of soil water and its influencing factors in hilly area of Chongqing,China

International Journal of Agricultural and Biological Engineering 2014年第4期7卷 47-59页

作者： Zhong Shouqin Zhang Weihua Lv Jiake Wei Chaofu College of Resources and Environment Southwest UniversityChongqing 400700China School of Computer and Information Science Southwest UniversityChongqing 400700China

The paper studied the temporal variation of soil water content and its influencing factors in hilly area of Chongqing by the yearly data of 2006 and *** to precipitation anomaly percentage,the year 2006 was a dry year and 2007 a normal *** the dry year 2006,the variations of soil moisture in all three layers(0-10 cm,10-20 cm,20-40 cm)were medium(10%30%),and those of the two deeper layers were weak(CVarea was large in the dry year and small in the wet *** probability distributions of soil moisture in all three layers in both dry and normal years showed single-peak ***,peak locations and values varied with different layers and *** factors affecting the temporal variation of soil moisture in the 0-10 cm layer,during March to May,the meteorological factors including temperature,sunshine and precipitation were all inversely correlated with soil water content *** correlations with average temperature and accumulated temperature were both highly significant P<0.01(P=0.00).The inverse correlations with sunshine and precipitation were significant P<0.05(P=0.01).Among soil physical properties,except for bulk density which was inversely correlated with soil moisture,all other properties were positively *** material was positively correlated with soil moisture,which suggested that organics had the sponge effect and contributed to soil water storage and *** the period of June to September,there was no significant correlation between soil water content and total *** meteorological factors of temperature,accumulated temperature and sunshine were all inversely and highly significantly correlated with soil water content P<0.01(P=0.00).

关键词： soil water temporal variation influencing factors hilly area

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The Effects of Land Uses on Purplish Soil Erosion in hilly area of Sichuan Province,China

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Journal of Mountain Science 2005年第1期2卷 68-75页

作者： ZHAHGJianhui TLANGuanglong WEIChaofu InstituteofMountainHazardandEnvironment ChineseAcademyofScience＆WaterResourcesMinistryP.O.Box417ChengduSichuan610041China ResearchandDevelopmentDepartment MetropolitanWaterReclamationDistrictofGreaterChicago6oolW.PershingRoadCiceroIL60804-4112USA CollegeofResoureesandEnvironment SouthwestAgricultureUniversityChongqing400716China

In order to evaluate the soil erosion rate for different land uses and make recommendations on land-use alternatives for erosion control in hilly and mountain areas on a Purplish soil (Regosols in FAO taxonomy), experimental data were obtained from three continuously monitored sites located at Yanting, Nanbu and Pengxi of Sichuan province. The data showed that the rank of erosion rate is farmland > unfenced grassland > fenced grassland > forestland. The erosion rate of farmland was more than 3 times higher than that of forestland and fenced grassland, indicating that restricting human activity is crucial for over-erosion. The erodibility was higher at the initial period of rainy season for all the three types of land use. The erosion rates of fenced grassland and mature afforestation land were not proportional to rainfall intensity because these land uses changed impact energy of the rainfall. This research showed that restricting human activity, intensifying the management of initial period of rainy season, and increasing the cover rate of land surface are the three major measures for soil erosion prevention. It is recommended that farmers should cease cultivation on farmland at the top of hills and steep slope land return those lands back to grassland or forestland.

关键词： Soil erosion land use hilly area purplish soil

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Characteristics of Soil Seed Banks of Typical Plant Communities in hilly area of Funiu Mountain

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Asian Agricultural Research 2020年第11期12卷 27-33页

作者： Yanjiao LI Pengsen CAI Weishuang TONG Huashan GAO Yan ZHAO Limin WANG Key Laboratory of Ecological Restoration in hilly area Pingdingshan University Pingdingshan 467000 China College of Horticulture and Plant Protection Henan University of Science and Technology Luoyang 471003 China

[Objectives]The purpose was to investigate the characteristics of soil seed bank of typical plant communities in hilly area of Funiu Mountain.[Methods]The seed density,number of species and species composition of the soil seed bank of typical plant communities such as Themeda japonica,Imperata cylindrica,Vitex negundo,Quercus acutissima,Robinia pseudoacacia,Platycladus orientalis and Populus canadensis in the surface,top 0-5 and top 5-10 cm soil were studied.[Results]The seed reserves of plant communities at different succession stages were(220.00±95.39)–(2650.00±1064.52)seeds/m2.A total of 48 species were counted in the seed bank,belonging to 45 genera in 22 *** 27 species were identified in the above-ground vegetation,belonging to 25 genera in 14 *** the shallow soil where the seeds gathered,the seed densities of Imperata cylindrica and Themeda japonica were relatively *** reserves of plant communities with different naturalness degrees were(403.33±64.29)-(2110.00±356.79)seeds/m2.A total of 67 species were counted in the seed bank,belonging to 64 genera in 37 families.A total of 45 species were identified in the above-ground vegetation,belonging to 43 genera in 28 *** the soil layers of 0-5 and 5-10 cm,the seed density of natural secondary *** was higher than those of planted ***,*** and *** each soil layer,the species number of natural secondary *** forest was slightly smaller than those of planted ***,*** and *** forests.[Conclusions]The seeds in the soil seed bank may not completely come from existing above-ground *** assistance is required for vegetation restoration or reconstruction relying on soil seed bank,to ensure the direction of community succession.

关键词： Soil seed bank Seed density Species number Species composition hilly area Funiu Mountain

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Problems and prospects of fish farming in the Chattogram Hill Tracts of Bangladesh:Community-based aquaculture might be a right choice

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Aquaculture and Fisheries 2024年第2期9卷 306-313页

作者： Saifuddin Rana MdNazmul Hasan Abdulla Al Bari Shahida Arfine Shimul SkIstiaque Ahmed Sk.Ahmad Al Nahid Department of Fisheries Resource Management Faculty of FisheriesChattogram Veterinary and Animal Sciences UniversityKhulshi4225ChattogramBangladesh Department of Oceanography University of ChittagongChittagong4331Bangladesh

The study was carried out in Matiranga Upazila,Bandarban district,which is considered one of Bangladesh’s major hill tract *** study aimed to identify present farming conditions,prospects,and problems and suitable solutions to the problems of fish *** participatory rapid appraisal tools such as focus group discussion,field visits,and farmers’interviews were used to collect relevant fish farming information in the study *** polyculture method was the most practised aquaculture *** the selected farms,eleven fish species were identified as culture *** transportation cost for seeds purchased from remote areas was high(11%of total seed cost).The average transportation-related mortality of fish fry and fingerlings was 7.2%and 2.8%.Feed cost was found as the major cost(58.4%)in *** and revenue for fish production per decimal varied from BDT 311 to 3528 and BDT 23 to *** of vacant lake,youth and women engagement,integrated aquaculture,the desire of people to engage in aquaculture,and available human resources were found as significant *** major problems identified were lack of hatchery,high feed cost,lack of stakeholder linkage,lack of capital for fish farming,and lack of proper knowledge,guidelines,and consultancy for fish culture.A community-based aquaculture model was proposed to overcome the present challenges and problems in the study *** model may help to expand aquaculture and thus improve the livelihood and socio-economic status of the people of the hilly areas of Bangladesh.

关键词： hilly area Aquaculture model Tribal people Fish farming prospects

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Spatiotemporal variation of agricultural patterns in different geomorphologic and climatic environments in the eastern Loess Plateau,north-central China during the late Neolithic and Bronze Ages

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Science China Earth Sciences 2022年第5期65卷 934-948页

作者： Haiming LI Yifu CUI Nathaniel JAMES Melissa RITCHEY Fengwen LIU Junna ZHANG Minmin MA Guanghui DONG College of Humanities&Social Development Nanjing Agricultural UniversityNanjing 210095China Institution of Chinese Agricultural Civilization Nanjing Agricultural UniversityNanjing 210095China Agricultural Archaeology Research Center Nanjing Agricultural UniversityNanjing 210095China College of Tourism Huaqiao UniversityQuanzhou 362021China Ministry of Education Key Laboratory of Western China’s Environmental System College of Earth&Environmental SciencesLanzhou UniversityLanzhou 730000China Department of Anthropology University of California San DiegoSan DiegoCA 92093USA Department of Anthropology Washington University in St.LouisSt.LouisMO 63130USA Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environment ScienceYunnan UniversityKunming 650504China Laboratory for Environmental Archaeology Archaeological Research CenterBeijing Union UniversityBeijing 100191China

Human settlement and agricultural development are closely linked to local geomorphological and climatic ***,the variation in agricultural systems in different environmental and prehistoric contexts remains *** report new archaeobotanical and radiocarbon dates from 34 Neolithic and Bronze Age sites in the Hutuo River Valley(HTRV)in north-central China and compare them with updated archaeobotanical studies in the Sushui River Valley(SSRV)and Henan Province(HNP),to explore the similarities and differences of agricultural patterns under different geomorphologic and climatic environments in north-central *** results reveal that humans consistently cultivated foxtail and broomcorn millet in the HTRV from the Miaodigou(6000–5700 cal.a BP)to the Shang-Zhou(3600–2256 cal.a BP)period,despite the introduction of wheat and barley into the area around 4000 a *** conditions and hilly landforms in the HTRV,SSRV and some parts of the HNP led people to develop foxtail and broomcorn millet dry land farming practices between 7000 and 3000 a ***,in other areas of the HNP,the climate conditions and alluvial plains enabled people to develop a mixed agriculture of millets,soybeans,and rice from 7000 to 4000 a BP,with the addition of wheat between 4000 and 3000 a ***’different agricultural technologies and interactions with foreign cultures may have also influenced the formation of different agricultural patterns in the three regions between 7000 and 3000 a *** growth during 7000–3000 a BP can explain the overall propensity of the higher-yield foxtail millet rather than broomcorn millet as the main cultivated *** the HTRV,however,higher proportions of broomcorn millet(as compared to the SSRV and HNP),may reflect the greater drought and heat tolerance of broomcorn millet,representing an adaptive agricultural strategy in the river valley.

关键词： Archaeobotanical Agricultural patterns Climate conditions hilly area Alluvial plains

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Integrated rice management simultaneously improves rice yield and nitrogen use efficiency in various paddy fields

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Pedosphere 2020年第6期30卷 863-873页

作者： Yujiao DONG Fanwen ZENG Jiang YUAN Guangbin ZHANG Yuanxue CHEN Xuejun LIU Padilla HILARIO Tusheng REN Shihua LU College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China Soil and Fertilizer Institute Sichuan Academy of Agricultural SciencesChengdu 610066China Bureau of Agriculture in Shehong County Suining CitySichuan ProvinceShehong 629200China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Sichuan Agricultural University Wenjiang 611130China Kadoorie Farm and Botanic Garden Hong Kong 999077China

The hilly area of Southwest China is a typical rice production area which is limited by seasonal droughts and low temperature in the early rice growth period.A field experiment was conducted on three typical paddy fields(low-lying paddy field,medium-elevation paddy field,and upland paddy field)in this ***(N)treatment(180 kg N ha-1 year-1)was compared to a control treatment(0 kg N ha-1 year-1)to evaluate the effects of integrated rice management(IRM)on rice growth,grain yield,and N *** rice management integrated raised beds containing plastic mulch,furrow irrigation,and triangular *** comparison to traditional rice management(TRM),IRM promoted rice tiller development,with 7–13 more tillers per cluster at the maximum tillering stage and 1–6 more tillers per cluster at the end of tillering *** rice management significantly increased the rice aboveground biomass by 34.4%–109.0%in different growth periods and the aboveground N uptake by 25.3%–159.0%.Number of productive tillers significantly increased by 33.0%,resulting in a 33.0%increase in grain yield and 8.0%improvement of N use efficiency(NUE).Grain yields were significantly increased in all three paddy fields assessed,with IRM being the most important factor for grain yield and productive tiller *** of paddy field type and N level on N uptake by aboveground plants were reflected in the rice reproductive growth period,with the effects of IRM more striking due to the dry climate *** conclusion,IRM simultaneously improved rice yield and NUE,presenting a valuable rice management technique in the paddy fields assessed.

关键词： grain yield hilly area nitrogen uptake paddy field type plastic mulch traditional rice management

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Planning Method of Ecological Embedded Industrial Parks

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Journal of Landscape Research 2017年第2期9卷 67-69页

作者： WANG Yu HE Qian School of Urban Construction Yangtze University Xianning Institute of Urban Planning & Design

Exploration of the gentle slopes of low mountains and hills has already become a new topic in the development of urban land resources in hilly areas. For the high ecological sensitivity, tremendous cost of urban construction, as well as complicate utilization technology, planning and design of gentle slopes of low mountains and hills are faced with serious challenges. This paper took the planning of Yidu High-tech Industrial Park for example, to explore the design concepts and rational methods of planning "ecological embedded" industrial parks in hilly areas.

关键词： hilly area Gentle slope of low mountains and hills Ecological embedded type GIS Multiple factors

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