检索结果-南通市图书馆

Development of sensor systems for precision agriculture in cotton

International Journal of Agricultural and Biological Engineering 2012年第4期5卷 1-14,F0003页

作者： ruixiu sui J.Alex Thomasson Yufeng Ge United States Department of Agriculture Agricultural Research ServiceCrop Production Systems Research UnitStonevilleMSUSA Biological&Agricultural Engineering Department Texas A&M UniversityCollege StationTXUSA

Precision agriculture(PA)is an information-based technology,using detailed information within an agricultural field to optimize production inputs on a spatially variable basis,maximize farm profit,and minimize environmental *** collection and processing plays a very important role in *** recent years PA technologies have been gradually adopted in cotton *** sensor systems for PA were developed and field-evaluated in cotton,including a plant height measurement system(PHMS),the Mississippi cotton yield monitor(MCYM),and cotton fiber quality *** PHMS used an ultrasonic sensor to scan the plant canopy and determine plant height in real time in situ.A plant height map was generated with the data collected with the *** plant height showed a close relationship with yield(R2=0.63)and leaf-nitrogen content(R2=0.48).The MCYM was developed for cotton yield mapping.A patented mass-flow sensor technology was employed in the *** sensor measured optical reflectance of cotton particles passing through the sensor and used the measured reflectance to determine cotton-mass flow *** tests indicated that the MCYM could measure cotton yield with an average error less than 5%,and it was easy to install and *** cotton fiber-quality mapping research involved a wireless cotton module-tracking system(WCMTS)and a cotton fiber quality mapping system(CFQMS).The WCMTS was based on the concept that a cotton fiber-quality map could be generated with spatial information collected by the system during harvesting coupled with fiber quality information available in cotton classing *** WCMTS was constructed and tested,and it operated according to design,with module-level fiber-quality maps easily made from the collected *** CFQMS was designed and fabricated to perform real-time measurement of cotton fiber quality as the cotton is harvested in the *** results indicated that the sensor was capable of accurately estim

关键词： sensor precision agriculture(PA) cotton yield monitor fiber quality plant height

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Estimation of cotton yield with varied irrigation and nitrogen treatments using aerial multispectral imagery

引用

International Journal of Agricultural and Biological Engineering 2013年第2期6卷 37-41页

作者： Yanbo Huang ruixiu sui Steven J.Thomson Daniel K.Fisher Crop Production Systems Research Unit Agricultural Research ServiceUnited States Department of AgricultureStonevilleMS 38776USA

Cotton yield varies spatially within a *** variability can be caused by various production inputs such as soil properties,water management,and fertilizer *** multispectral imaging is capable of providing data and information to study effects of the inputs on yield qualitatively and quantitatively in a timely and cost-effective fashion.A 10-ha cotton field with irrigation and non-irrigation 2×2 blocks was used in this *** nitrogen application treatments were randomized with two replications within each *** plant canopy was closed,airborne multispectral images of the field were acquired using a 3-CCD MS4100 *** images were processed to generate various vegetation *** vegetation indices were evaluated for the best performance to characterize *** effect of irrigation on vegetation indices was *** for yield estimation were developed and verified by comparing the estimated and actual *** indicated that ratio of vegetation index(RVI)had a close relationship with yield(R^(2)=0.47).Better yield estimation could be obtained using a model with RVI and soil electrical conductivity(EC)measurements of the field as explanatory variables(R^(2)=0.53).This research demonstrates the capability of aerial multispectral remote sensing in estimating cotton yield variation and considering soil properties and nitrogen.

关键词： remote sensing multispectral imagery cotton yield nitrogen irrigation soil properties

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cotton-harvester-flow simulator for testing cotton yield monitors

引用

International Journal of Agricultural and Biological Engineering 2010年第1期3卷 44-49页

作者： ruixiu sui J.Alex Thomasson S.D.Filip To USDA-ARS Cotton Ginning Research Unit StonevilleMS 38776USA Biological and Agricultural Engineering Department Texas A&M UniversityCollege StationTX 77843USA Agricultural and Biological Engineering Department Mississippi State UniversityMississippi StateMS 39762USA

An experimental system was developed to simulate the pneumatic flow arrangement found in picker-type cotton *** simulation system was designed and constructed for testing a prototype cotton yield monitor developed at Mississippi State *** simulation system was constructed to approximate the pneumatic cotton flow system of a cotton picker,and was capable of operating with varying cotton flow *** simulator was tested with different cotton flow rates,and the relationship between feeder rate and amount of conveyed seed cotton was found to be ***,the simulator was used to conduct tests with the novel optical cotton yield monitor,which proved accurate at measuring the amount of seed cotton flowing through the ***,some differences between laboratory testing and field-testing were noted:seed cotton becomes fluffed and twisted when recycled through the simulator,and seed cotton stored in the laboratory tends to be of lower moisture content than cotton during *** differences should be considered when using a laboratory simulator to test cotton yield monitors.

关键词： cotton yieldmonitor precision agriculture sensor cotton harvester

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of irrigation and planting geometry on cotton(Gossypium hirsutum L.)fiber quality and seed composition

引用

Journal of Cotton Research 2021年第1期4卷 1-11页

作者： PINNAMANENI Srinivasa R. ANAPALLI Saseendran S. sui ruixiu BELLALOUI Nacer REDDY Krishna N. USDA-ARS Sustainable Water Management Research UnitStonevilleMS 38776USA USDA-ARS Crop Genetics Research UnitStonevilleMS 38776USA USDA-ARS Crop Production Systems Research UnitStonevilleMS 38776USA

Background:Cotton fiber quality and seed composition play vital roles in the economics of cotton production systems and the cottonseed meal *** research aimed to examine the effects of different irrigation levels and planting geometries on fiber quality and seed composition of cotton(Gossypium hirsutum L.).We conducted a 2-year study in 2018 and 2019 in a warm,humid area in the Southeast United States on Dundee silt loam *** were three irrigation treatments in the *** treatments included irrigating every furrow,or full irrigation(FI),every alternate furrow,or half irrigation(HI),and no irrigation,or rain-fed(RF).Planting geometries were on ridges spaced 102 cm apart and either a single-row(SR)or twin-rows(TR).Results:The results of high-volume instrument(HVI),advanced fiber information systems(AFIS)and near-infrared reflectance spectroscopy(NIRS)showed that irrigation and planting treatments played a significant role in fiber quality and seed *** irrigation treatments,significant differences were seen in fiber properties,including fineness,maturity ratio,micronaire,neps,short fiber,strength,uniformity,upper half mean length(UHML),upper quartile length by weight(UQLw),and yellowness(+b).Irrigation and planting geometry(PG)had a significant effect on micronaire,strength,and UHML while their interaction was significant only for *** micronaire was negatively affected by irrigation as FI-SR,FI-TR,HI-SR,and HI-TR recorded 11%~12%lower over the RF-SR and TR *** PG played a minor role in determining fiber quality traits like micronaire and nep *** treatments produced significantly lower(3%~4%)protein content than rain-fed,while oil content increased significantly(6%~10%).Conclusions:The study results indicate a potential for improving cotton fiber and seed qualities by managing irrigation and planting geometries in cotton production systems in the Mississippi(MS)Delta *** HI-TR system appears pr

关键词： Cotton Fiber quality Seed composition Micronaire Fiber length

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

Irrigation Methods and Scheduling in the Delta Region of Mississippi: Current Status and Strategies to Improve Irrigation Efficiency

引用

American Journal of Plant Sciences 2014年第20期5卷 2917-2928页

作者： Hirut Kebede Daniel K. Fisher ruixiu sui Krishna N. Reddy Crop Production Systems Research Unit USDA-ARS Stoneville MS USA

Even though annual rainfall is high in the Delta region of Mississippi, only 30% occurs during the months in which the major crops are produced, making irrigation often necessary to meet crop water needs and to avoid risk of yield and profitability loss. Approximately, 65% of the farmland in this region is irrigated. The shallow Mississippi River Valley Alluvial Aquifer is the major source of water for irrigation and for aquaculture in the predominant catfish industry. This groundwater is being heavily used as row-crop irrigation has increased tremendously. Water level in this aquifer has declined significantly over the past twenty five years, with overdraft of approximately 370 million cubic meters of water per year. Moreover, the common irrigation practices in the Delta re-gion of Mississippi do not use water efficiently, further depleting the ground water and making ir-rigation more expensive to producers due to increasing energy prices. Irrigation experts in the re-gion have tested and verified various methods and tools that increase irrigation efficiency. This article presents a review of the current status of the irrigation practices in the Delta region of Mis-sissippi, and the improved methods and tools that are available to increase irrigation efficiency and to reduce energy costs for producers in the region as well as to stop the overdraft of the declining aquifer, ensuring its sustainable use.

关键词： The Delta Region of Mississippi Irrigation Efficiency Irrigation Scheduling Furrow Irrigation Crop Water Use

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Corn Yield Response to Reduced Water Use at Different Growth Stages

引用

Agricultural Sciences 2014年第13期5卷 1305-1315页

作者： Hirut Kebede ruixiu sui Daniel K. Fisher Krishna N. Reddy Nacer Bellaloui William T. Molin Crop Production Systems Research Unit USDA-ARS Stoneville MS USA Crop Genetics Research Unit USDA-ARS Stoneville MS USA

To develop an efficient water use strategy for crop irrigation, we need to know how much water can be reduced without decreasing yield. A study was designed to determine corn growth stages at which water could be reduced without affecting grain yield, and at what soil moisture level water deficit stress begins in the plants in a silt loam soil. An experiment was conducted in a randomized complete block with a 3 × 4 factorial design in four replications, where treatments consisted of three soil moisture levels [100%, 75%, and 50% of field capacity (FC) of a silt loam soil by weight] and four growth stages [fourteen leaf stage (V14), silking (R1), milk (R3), and dent (R5) stages] in a greenhouse. Growth stages at the reproductive and grain fill stages of corn were selected because this study was intended for the Mississippi Delta, where there is frequent drought during these growth stages making irrigation necessary for corn production, whereas there is usually adequate rainfall during the vegetative growth stages. Results from this study showed that reducing soil moisture from 100% FC (fully irrigated) to 75% FC of a silt loam soil starting at the R1 growth stage in corn did not reduce yield significantly compared to yield from the 100% FC, while saving a significant amount of water. Physiological investigations at the three soil moisture treatments showed that a mild moisture deficit stress might have started at the 75% FC treatment. With further investigation, if savings in water at 75% FC result in a significant reduction in energy cost, it may be profitable to reduce soil moisture to 75% FC in a silt loam soil.

关键词： Corn Water Use Soil Moisture Growth Stage Field Capacity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

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

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

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：