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An integrated approach to site-specific management zone delineation
Yuxin MIAO, David J. MULLA, Pierre C. ROBERT
《农业科学与工程前沿(英文)》 2018年 第5卷 第4期 页码 432-441 doi: 10.15302/J-FASE-2018230
Dividing fields into a few relatively homogeneous management zones (MZ) is a practical and cost-effective approach to precision agriculture. There are three basic approaches to MZ delineation using soil and/or landscape properties, yield information, and both sources of information. The objective of this study is to propose an integrated approach to delineating site-specific MZ using relative elevation, organic matter, slope, electrical conductivity, yield spatial trend map, and yield temporal stability map (ROSE-YSTTS) and evaluate it against two other approaches using only soil and landscape information (ROSE) or clustering multiple year yield maps (CMYYM). The study was carried out on two no-till corn-soybean rotation fields in eastern Illinois, USA. Two years of nitrogen (N) rate experiments were conducted in Field B to evaluate the delineated MZs for site-specific N management. It was found that in general the ROSE approach was least effective in accounting for crop yield variability (8.0%–9.8%), while the CMYYM approach was least effective in accounting for soil and landscape (8.9%–38.1%), and soil nutrient and pH variability (9.4%–14.5%). The integrated ROSE-YSTTS approach was reasonably effective in accounting for the three sources of variability (38.6%–48.9%, 16.1%–17.3% and 13.2%–18.7% for soil and landscape, nutrient and pH, and yield variability, respectively), being either the best or second best approach. It was also found that the ROSE-YSTTS approach was effective in defining zones with high, medium and low economically optimum N rates. It is concluded that the integrated ROSE-YSTTS approach combining soil, landscape and yield spatial-temporal variability information can overcome the weaknesses of approaches using only soil, landscape or yield information, and is more robust for MZ delineation. It also has the potential for site-specific N management for improved economic returns. More studies are needed to further evaluate their appropriateness for precision N and crop management.
关键词: economically optimum nitrogen rate fuzzy cluster analysis precision nitrogen management site-specific management soil landscape property yield map
Optimum nitrogen fertilization of
Wentao ZOU,Ruifeng JIA,Jinchang YANG,Rongsheng LI,Guangtian YIN
《农业科学与工程前沿(英文)》 2016年 第3卷 第4期 页码 368-374 doi: 10.15302/J-FASE-2016120
关键词: Calophyllum inophyllum growth nitrogen fertilization nutrient status photosynthesis
《化学科学与工程前沿(英文)》 2023年 第17卷 第11期 页码 1788-1800 doi: 10.1007/s11705-023-2326-8
关键词: carbon nanospheres size-controlled nitrogen-doped high-rate supercapacitors
SUSTAINABLE NITROGEN MANAGEMENT FOR VEGETABLE PRODUCTION IN CHINA
《农业科学与工程前沿(英文)》 2022年 第9卷 第3期 页码 373-385 doi: 10.15302/J-FASE-2022455
● Sustainable nitrogen management strategies for Chinese vegetable production are summarized.
关键词: enhanced-efficiency nitrogen fertilizer integrated knowledge and products strategy nitrogen rate reactive nitrogen loss vegetable yield
Circulating fluidized bed biological reactor for nutrients removal
CUI Yubo, LIU Hongbo, BAI Chunxue
《环境科学与工程前沿(英文)》 2008年 第2卷 第3期 页码 349-353 doi: 10.1007/s11783-008-0051-7
关键词: soluble chemical bioreactor biological nitrogen optimum nitrified nitrogen removal
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 530-540 doi: 10.15302/J-FASE-2023515
Soil nitrogen mineralization (Nmin) is a key process that converts organic N into mineral N that controls soil N availability to plants. However, regional assessments of soil Nmin in cropland and its affecting factors are lacking, especially in relation to variation in elevation. In this study, a 4-week incubation experiment was implemented to measure net soil Nmin rate, gross nitrification (Nit) rate and corresponding soil abiotic properties in five field soils (A–C, maize; D, flue-cured tobacco; and E, vegetables; with elevation decreasing from A to E) from different altitudes in a typical intensive agricultural area in Dali City, Yunnan Province, China. The results showed that soil Nmin rate ranged from 0.10 to 0.17 mg·kg−1·d−1 N, with the highest value observed in field E, followed by fields D, C, B, and A, which indicated that soil Nmin and Nit rates varied between fields, decreasing with elevation. The soil Nit rate ranged from 434.2 to 827.1 µg·kg−1·h−1 N, with the highest value determined in field D, followed by those in fields E, C, B, and A. The rates of soil Nmin and Nit were positively correlated with several key soil parameters, including total soil N, dissolved organic carbon and dissolved inorganic N across all fields, which indicated that soil variables regulated soil Nmin and Nit in cropland fields. In addition, a strong positive relationship was observed between soil Nmin and Nit. These findings provide a greater understanding of the response of soil Nmin among cropland fields related to spatial variation. It is suggested that the soil Nmin from cropland should be considered in the evaluation of the N transformations at the regional scale.
关键词: cropland gross nitrification rate regulatory factors soil nitrogen mineralization spatial variation
Zhiqiang Chen, Lizhi Zhao, Ye Ji, Qinxue Wen, Long Huang
《环境科学与工程前沿(英文)》 2019年 第13卷 第4期 doi: 10.1007/s11783-019-1135-2
Effect of nitrogen on mixed culture PHA production was reconsidered. Enrichment history of PHA accumulating culture was discussed. Higher PHA content and biomass growth were achieved in presence of nitrogen. Enrichment strategy toward higher PHA accumulation was investigated. Microbial community succession in PHA accumulation phase was investigated.
关键词: Polyhydroxyalkanoate (PHA) Organic loading rate Nitrogen content Biomass growth Enrichment history
R. LALITHA NARAYANA, V. RAMACHANDRA RAJU
《能源前沿(英文)》 2020年 第14卷 第1期 页码 105-113 doi: 10.1007/s11708-018-0536-4
关键词: distillation efficiency solar still heat transfer coefficient water depth optimum and mass flow rate
Song-Song XU, Meng-Hua LI
《农业科学与工程前沿(英文)》 2017年 第4卷 第3期 页码 279-288 doi: 10.15302/J-FASE-2017151
关键词: sheep high-throughput screening productive traits genome-wide studies
方林,王浚
《中国工程科学》 2006年 第8卷 第1期 页码 77-80
为了选择经济高效的旅客机环境控制系统,对现役各种旅客机采用的环境控制系统方案进行了优化设计和比较,分别建立了二轮简单式低压除水系统、三轮升压式高压除水系统和四轮升压式高压除水系统(又称冷凝循环制冷系统)的优化设计数学模型,以起飞燃油质量代偿损失为目标函数,采用广义乘子法结合单纯形加速法求解,优化结果可作为设计研究旅客机环境控制系统的理论依据。
何平
《中国工程科学》 2003年 第5卷 第7期 页码 40-46
对系统非优分析理论做了较为详细的论述。指出寻求不确定系统优化的主要问题,关键是缺少对系统的非优分析。在系统非优范畴的基础上建立了征兆群与经验分析,提出了系统非优度量以及从非优追踪到系统自组织等问题。
Fating LI, Pengfei JIE, Zhou FANG, Zhimei WEN
《能源前沿(英文)》 2021年 第15卷 第1期 页码 170-185 doi: 10.1007/s11708-020-0680-5
关键词: double pipes optimization model optimum insulation thickness minimum annual total cost
Estimation of optimum design of structural systems via machine learning
《结构与土木工程前沿(英文)》 2021年 第15卷 第6期 页码 1441-1452 doi: 10.1007/s11709-021-0774-0
关键词: optimization metaheuristic algorithms harmony search structural designs machine learning artificial neural networks
Shiyan ZHENG
《能源前沿(英文)》 2011年 第5卷 第4期 页码 367-375 doi: 10.1007/s11708-011-0170-x
关键词: internal combustion engine irreversibility power output efficiency optimization
SUSTAINABLE NITROGEN MANAGEMENT IN AUSTRALIAN AGROECOSYSTEMS: CHALLENGES AND OPPORTUNITIES
《农业科学与工程前沿(英文)》 2022年 第9卷 第3期 页码 366-372 doi: 10.15302/J-FASE-2022447
● There is huge potential for improvement of nitrogen management in Australia.
关键词: Australian agroecosystems reactive nitrogen sustainable development
标题 作者 时间 类型 操作
An integrated approach to site-specific management zone delineation
Yuxin MIAO, David J. MULLA, Pierre C. ROBERT
期刊论文
Optimum nitrogen fertilization of
Wentao ZOU,Ruifeng JIA,Jinchang YANG,Rongsheng LI,Guangtian YIN
期刊论文
Size-controllable synthesis of monodispersed nitrogen-doped carbon nanospheres from polydopamine forhigh-rate supercapacitors
期刊论文
Circulating fluidized bed biological reactor for nutrients removal
CUI Yubo, LIU Hongbo, BAI Chunxue
期刊论文
REGIONAL ASSESSMENT OF SOIL NITROGEN MINERALIZATION IN DIVERSE CROPLAND OF A REPRESENTATIVE INTENSIVE
期刊论文
Reconsideration on the effect of nitrogen on mixed culture polyhydroxyalkanoate production toward high
Zhiqiang Chen, Lizhi Zhao, Ye Ji, Qinxue Wen, Long Huang
期刊论文
Experimental study on performance of passive and active solar stills in Indian coastal climatic condition
R. LALITHA NARAYANA, V. RAMACHANDRA RAJU
期刊论文
Recent advances in understanding genetic variants associated with economically important traits in sheep
Song-Song XU, Meng-Hua LI
期刊论文
Determining the optimum economic insulation thickness of double pipes buried in the soil for district
Fating LI, Pengfei JIE, Zhou FANG, Zhimei WEN
期刊论文
Unified cycle model of a class of internal combustion engines and their optimum performance characteristics
Shiyan ZHENG
期刊论文