Login
Toggle navigation
Home
ICPA
Conference
Abstract Management
Abstract Topic Groups
Author Instructions
Registration
Registration Information
16th ICPA - Conference Registration
Registrants Map
Hotel and Travel Information
Tour
Workshops
Exhibit Hall Map
Sponsors
Conference Program
General Outline
Oral Program
Poster Program
Student Poster Awards
Keynote
Plenary Session
Awards
Photos
Conference Survey
Proceedings
Leadership
ISPA Leadership
Officers
Past Presidents
Officer Responsibilities
Country Representatives
Communities
Community Guidance
On-Farm Experimentation
Nitrogen
Latin America
Economics
African Association for Precision Agriculture
Membership
ISPA Member Benefits
Membership Form
Events
ISPA Events
ACPA
ACPA Proceedings
AfCPA
AfCPA Proceedings
CLAP
CLAP Proceedings
ECPA
ECPA Proceedings
ICPA
ISPA Webinars
OFE
AAPA
Latin American
Robotics and Automation Symposium
Event Overview
Registration
Program
Venue
Speakers
About ISPA
Newsletters
History
Jobs
Precision Ag Definition
Agriculture Course Database Submission
Publications
ICPA Proceedings
ECPA Proceedings
Contact Us
Members
Suggestion Form
Conference
Abstract Management
Abstract Topic Groups
Author Instructions
Registration
Registration Information
16th ICPA - Conference Registration
Registrants Map
Hotel and Travel Information
Tour
Workshops
Exhibit Hall Map
Sponsors
Conference Program
General Outline
Oral Program
Poster Program
Student Poster Awards
Keynote
Plenary Session
Awards
Photos
Conference Survey
Proceedings
Proceedings
Search
Authors
Topics
Years
Types
Find matching any:
Reset
» Add more types
Add filter to result:
Evaluating Different Nitrogen Management Strategies For The Intensive Wheat-Maize System In North China Plain
1
Q. Cao,
1
Y. Miao,
2
G. Feng,
3
F. Li,
1
B. Liu,
1
X. Gao,
1
Y. Liu
1. China Agricultural University
2. Qingfeng Farm
3. Inner Mongolia Agricultural University
The sustainable agricultural development involves both environmental challenges and production goals to meet growing food demand. However, excessive nitrogen (N) applications are threatening the sustainability of intensive agriculture in the North China Plain (NCP). Improved N management should result in greater N use efficiency (NUE) and producer profit while reducing the risk of environmental contamination. Therefore, developing and disseminating feasible N management strategies that will achieve both high yields and high NUE are crucial. Many recently developed N management strategies have been successful in improving NUE and reducing N losses while achieving similar grain yield as farmer’s practice. The objective of this study was to evaluate different N management strategies for the intensive wheat-maize double cropping system in NCP. Field experiments were conducted from 2008 to 2012 at Quzhou Experiment Station of China Agricultural University in Hebei Province. The six N management strategies evaluated were (i) no N fertilizer as control (N0), (ii) soil mineral N (N
min
) test-based in-season root-zoon N management strategy (IRNM-soil N
min
), (iii) GreenSeeker-based precision N management strategy (PNM-GS), (iv) green window-based in-season N management strategy (INM-GW), (v) regional optimum N management strategy (RONM), (vi) farmer’s N practice (FNP). The N fertilizer rate determined with IRNM-soil N
min
, PNM-GS, INM-GW and RONM were significantly reduced by 45%, 62%, 46% and 40% compared to the FNP, respectively, without significant changes in grain yield. As a result, the IRNM-soil N
min
, PNM-GS, INM-GW and RONM increased N use efficiency. Future studies are needed to integrate this strategy into high yield crop management system to achieve both high yield and high NUE simultaneously for food security and sustainable development.
Keyword
: Precision nitrogen management; In-season nitrogen management; GreenSeeker sensor; Soil Nmin test; Nitrogen use efficiency; Nitrogen losses
Q. Cao
Y. Miao
G. Feng
F. Li
B. Liu
X. Gao
Y. Liu
Precision Nutrient Management
Oral
2014
Download paper