Estimating nutrient uptake requirements for wheat in China

被引:83
作者
Chuan, Limin [1 ]
He, Ping [1 ,2 ]
Jin, Jiyun [1 ,2 ]
Li, Shutian [1 ,2 ]
Grant, Cynthia [3 ]
Xu, Xinpeng [1 ]
Qiu, Shaojun [1 ]
Zhao, Shicheng [1 ]
Zhou, Wei [1 ]
机构
[1] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Plant Nutr & Fertilizer, Beijing 100081, Peoples R China
[2] Int Plant Nutr Inst China Program, Beijing 100081, Peoples R China
[3] Agr & Agri Food Canada, Brandon Res Ctr, Brandon, MB R7A 5Y3, Canada
基金
中国国家自然科学基金;
关键词
QUEFTS model; Wheat; Internal efficiency; Balanced nutrient requirement; FERTILIZER RECOVERY RATES; IRRIGATED LOWLAND RICE; QUANTITATIVE-EVALUATION; USE EFFICIENCY; YIELD GAPS; MAIZE; MANAGEMENT; NITROGEN; QUEFTS; PHOSPHORUS;
D O I
10.1016/j.fcr.2013.02.015
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Estimating balanced nutrient requirement for wheat (Triticum aestivum L.) in China is essential to manage nutrient application more effectively for increasing crop yields and reducing risk of negative environmental impact. Datasets from 2000 to 2011 dealing with nitrogen (N), phosphoruS (P) and potassium (K) treatments across the winter and spring wheat growing regions in China were collected to assess the relationship between grain yield and nutrient uptake, and to estimate N, P and K optimal nutrient requirements for a target yield using the QUEFTS (Quantitative Evaluation of the Fertility of Tropical Soils) model. In the QUEFTS model, two boundary lines described the minimum and maximum internal efficiencies (IEs, kg grain per kg nutrient in above-ground plant dry matter) of N, P and K. The minimum and maximum IEs for wheat were 28.8 and 62.6 kg grain per kg N, 98.9 and 487.4 kg grain per kg P, and 23.0 and 112.9 kg grain per kg K. The QUEFTS model predicted a linear-parabolic-plateau curve for balanced nutrient uptake with target yield increasing. The linear part continued until the yield was approximately at 60-70% of the potential yield, and 22.8 kg N, 4.4 kg P and 19.0 kg K were required to produce 1000 kg grain. The corresponding N:P:K ratio was 5.18:1:4.32, and the corresponding IEs were 43.9, 227.0 and 52.7 kg grain per kg N, P and K, respectively. The QUEFTS model simulated balanced N, P and K removal by 1000 kg grain were 18.3, 3.6 and 3.5 kg, respectively, with a N:P:K ratio of 5.08:1:0.97. Approximately 80%, 82% and 18% of N, P and K in total above-ground plant material were presented in the grain and removed from the field. The relationship between grain yield and nutrient uptake was also estimated to suggest fertilizer application avoiding excess or deficient nutrient supply. Field experiment validation confirmed that the QUEFTS model could be used as a practical tool for the Nutrient Expert decision support system to make fertilizer recommendation. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:96 / 104
页数:9
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