检索范围:
排序: 展示方式:
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
《农业科学与工程前沿(英文)》 2021年 第8卷 第4期 doi: 10.15302/J-FASE -2020355
Agriculture faces the dual challenges of food security and environmental sustainability. Here, we investigate current maize production at the field scale, analyze the yield gaps and impacting factors, and recommend measures for sustainably closing yield gaps. An experiment was conducted on a 3.9-ha maize seed production field in arid north-western China, managed with border and drip irrigation, respectively, in 2015 and 2016. The relative yield reached 70% in both years. However, drip irrigation saved 227 mm irrigation water during a drier growing season compared with traditional border irrigation, accounting for 44% of the maize evapotranspiration (ET). Yield variability under drip irrigation was 12.1%, lower than the 18.8% under border irrigation. Boundary line analysis indicates that a relative yield increase of 8% to 10% might be obtained by optimizing the yield-limiting factors. Plant density and soil available water content and available nitrogen were the three major factors involved. In conclusion, closing yield gaps with agricultural sustainability may be realized by optimizing agronomic, irrigation and fertilizer management, using water-saving irrigation methods and using site-specific management.
关键词: boundary line analysis irrigation method precision agriculture spatial variability yield gaps yield-limiting factors
The effect of conservation tillage on crop yield in China
Hongwen LI,Jin HE,Huanwen GAO,Ying CHEN,Zhiqiang ZHANG
《农业科学与工程前沿(英文)》 2015年 第2卷 第2期 页码 179-185 doi: 10.15302/J-FASE-2015058
关键词: conservation tillage crop yield soil structure development strategies
《化学科学与工程前沿(英文)》 2023年 第17卷 第6期 页码 759-771 doi: 10.1007/s11705-022-2269-5
关键词: hydrocracking convolutional neural networks self-organizing map deep learning data-driven optimization
Breeding strategies for increasing yield potential in super hybrid rice
Shihua CHENG,Xiaodeng ZHAN,Liyong CAO
《农业科学与工程前沿(英文)》 2015年 第2卷 第4期 页码 277-282 doi: 10.15302/J-FASE-2015081
Highlight yield forming and innovative technologies in tropical crops
Wenquan WANG
《农业科学与工程前沿(英文)》 2016年 第3卷 第4期 页码 283-284 doi: 10.15302/J-FASE-2016128
A bacterial artificial chromosome-based physical map of
Yuhua FU,Zhiqiang XIA,Shujuan WANG,Xin CHEN,Cheng LU,Mingcheng LUO,Hongbin ZHANG,Wenquan WANG
《农业科学与工程前沿(英文)》 2016年 第3卷 第4期 页码 321-329 doi: 10.15302/J-FASE-2016124
刘经南,董杨,詹骄,高柯夫
《中国工程科学》 2019年 第21卷 第3期 页码 92-97 doi: 10.15302/J-SSCAE-2019.03.004
自动驾驶地图作为实现汽车自动驾驶的关键基础设施,对于推动我国自动驾驶领域的商业化开发至关重要。现阶段,我国受地图测绘、应用和监管等相关法律法规的制度掣肘,在自动驾驶地图的产业化进程方面相对滞后。为此,本文着重分析了我国在自动驾驶地图开发、应用和管理中面临的主要政策法规问题:自动驾驶地图是否需加密的问题、自动驾驶地图部分地理信息表达受限的问题、自动驾驶地图地理信息采集资质和审图流程的问题、自动驾驶地图事故责任和保险问题、自动驾驶地图相关测试规范和测试场景问题。同时结合国内外自动驾驶领域的发展趋势,给出加快我国自动驾驶汽车开发和商业化进程的四点建议:制定自动驾驶地图管理模式、允许自动驾驶地图应用试点及有序开放、适当放开企业权限及优化审核流程、建立国家级自动驾驶地图平台。
林宗坚
《中国工程科学》 2000年 第2卷 第4期 页码 43-47
文章针对当前我国1:5和1:1万地形图更新的大规模生产的迫切需求,提出在原有地形图栅格式数字化的基础上,叠加经过精密纠正配准的航空或卫星遥感影像,以栅格方式更新地物要素的全过程方法。文中特别阐述了:1)地形图栅格数字化不同于矢量数字化的扫描采样分辨率问题;2)区别于传统的“针孔式”控制点概念的图像图形阵列控制点技术;3)由于DEM(数字高程模型)数据缺乏或精度不足引起的航空航天影像与地形图图形配准误差的局部纠正方法;4)定性指导定量的影像判读方法;5)从遥感影像提取地物结构信息的半自动化方法。文章最后列出
YIELD AND FRUIT QUALITY OF ALMOND, PEACH AND PLUM UNDER REGULATED DEFICIT IRRIGATION
《农业科学与工程前沿(英文)》 2021年 第8卷 第4期 页码 583-593 doi: 10.15302/J-FASE -2020325
The effects of regulated deficit irrigation (RDI) on the performance of almond cv. Tuono, peach cv. JH-Hall and plum cv. Stanley were assessed on the Saiss Plain (NW, Morocco) over three consecutive growing seasons (2011–2013). Irrigation treatments consisted of a control, irrigation applied to fully satisfy crop water requirements (100% ETC), and two RDI treatments, irrigation applied to 75% ETC (RDI-75) and 50% ETC (RDI-50). These three treatments were applied during fruit-growth slowdown periods corresponding to Stages II and III in almond and Stage II in peach and plum. Yield and fruit quality traits were determined. The effect of RDI differed between species. Yield and fruit size were reduced significantly only in peach under RDI-50. Fruit quality improved in this species in the first year of the experiment, with an increase of sugar/acid ratio and polyphenol content. Plum quality also improved but the effects were significant only in the second and third years. Similar results were recorded in almond kernel, but their epidermal grooves were deeper under RDI-50, and this may have affected their commercial value. It is concluded that water can be saved during the fruit-growth slowdown period by up to 25% in peach and 50% in almond and plum with improvements in fruit quality without affecting total yield.
Estimating the effect of urease inhibitor on rice yield based on NDVI at key growth stages
Kailou LIU,Yazhen LI,Huiwen HU
《农业科学与工程前沿(英文)》 2014年 第1卷 第2期 页码 150-157 doi: 10.15302/J-FASE-2014028
关键词: normalized difference vegetation index (NDVI) N-(n-butyl) thiophosphoric triamide (NBPT) rice grain yield
Lodging resistance and yield potential of winter wheat: effect of planting density and genotype
Yonggui XIAO,Jianjun LIU,Haosheng LI,Xinyou CAO,Xianchun XIA,Zhonghu HE
《农业科学与工程前沿(英文)》 2015年 第2卷 第2期 页码 168-178 doi: 10.15302/J-FASE-2015061
关键词: common wheat yield potential lodging performance pushing resistance leaf area index
Relationship between the number of tapping-induced secondary laticifer lines and rubber yield among
Yueyi CHEN,Xinsheng GAO,Xiaofei ZHANG,Weimin TIAN
《农业科学与工程前沿(英文)》 2016年 第3卷 第4期 页码 363-367 doi: 10.15302/J-FASE-2016122
关键词: Hevea brasiliensis rubber yield breeding early evaluation tapping secondary laticifer differentiation
Xiuwei GUO, Manoj Kumar SHUKLA, Di WU, Shichao CHEN, Donghao LI, Taisheng DU
《农业科学与工程前沿(英文)》 2021年 第8卷 第4期 页码 525-544 doi: 10.15302/J-FASE-2020355
关键词: boundary line analysis irrigation method precision agriculture spatial variability yield gaps yield-limiting factors
Optimization of process parameters for mature landfill leachate pretreatment using MAP precipitation
Wei LI, Xiaowen DING, Min LIU, Yuewen GUO, Lei LIU
《环境科学与工程前沿(英文)》 2012年 第6卷 第6期 页码 892-900 doi: 10.1007/s11783-012-0440-9
关键词: magnesium ammonium phosphate precipitation mature landfill leachate optimization ammonium-nitrogen
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
PLANT DENSITY, IRRIGATION AND NITROGEN MANAGEMENT: THREE MAJOR PRACTICES IN CLOSING YIELD GAPS FOR AGRICULTURAL
期刊论文
The effect of conservation tillage on crop yield in China
Hongwen LI,Jin HE,Huanwen GAO,Ying CHEN,Zhiqiang ZHANG
期刊论文
Multiple input self-organizing-map ResNet model for optimization of petroleum refinery conversion units
期刊论文
Breeding strategies for increasing yield potential in super hybrid rice
Shihua CHENG,Xiaodeng ZHAN,Liyong CAO
期刊论文
A bacterial artificial chromosome-based physical map of
Yuhua FU,Zhiqiang XIA,Shujuan WANG,Xin CHEN,Cheng LU,Mingcheng LUO,Hongbin ZHANG,Wenquan WANG
期刊论文
Estimating the effect of urease inhibitor on rice yield based on NDVI at key growth stages
Kailou LIU,Yazhen LI,Huiwen HU
期刊论文
Lodging resistance and yield potential of winter wheat: effect of planting density and genotype
Yonggui XIAO,Jianjun LIU,Haosheng LI,Xinyou CAO,Xianchun XIA,Zhonghu HE
期刊论文
Relationship between the number of tapping-induced secondary laticifer lines and rubber yield among
Yueyi CHEN,Xinsheng GAO,Xiaofei ZHANG,Weimin TIAN
期刊论文
PLANT DENSITY, IRRIGATION AND NITROGEN MANAGEMENT: THREE MAJOR PRACTICES IN CLOSING YIELD GAPS FOR AGRICULTURAL
Xiuwei GUO, Manoj Kumar SHUKLA, Di WU, Shichao CHEN, Donghao LI, Taisheng DU
期刊论文