Nutrient requirements for maize in China based on QUEFTS analysis

Content Provider	Semantic Scholar
Author	Xu, Xinpeng He, Ping Pampolino, Mirasol F. Chuan, Limin Johnston, Adrian M. Qiu, Shaojun Zhao, Shicheng Zhou, Wei
Copyright Year	2013
Abstract	a b s t r a c t Estimating balanced nutrient requirements for maize (Zea mays L.) in China is essential to manage nutrient application more effectively for increasing crop yield and reducing the risk of negative environmental impact. On-farm datasets were collected from 2001 to 2010 from China's maize-producing regions to investigate the relationship between grain yield and nutrient accumulation in the above-ground plant dry matter of commercial hybrid maize. The QUEFTS (quantitative evaluation of the fertility of tropical soils) model was used to estimate the balanced nitrogen (N), phosphorus (P) and potassium (K) requirements in China's maize growing regions. The analysis indicated that there were great differences in the grain yield and nutrient uptake between spring maize and summer maize: minimum and maximum internal nutrient efficiencies (IE, kg grain per kg nutrient in the above-ground plant dry matter) were 36 and 89 kg grain per kg N, 135 and 558 kg grain per kg P, 30 and 132 kg grain per kg K for spring maize, 31 and 70 kg grain per kg N, 108 and 435 kg grain per kg P, 32 and 110 kg grain per kg K for summer maize. The model predicted a linear increase in grain yield if nutrients were taken up in balance until yield reached about 60-70% of the potential yield. To produce 1000 kg of spring maize grain yield, 16.9 kg N, 3.5 kg P and 15.3 kg K were required by above-ground dry matter of maize, and the corresponding IE were 59 kg grain per kg N, 287 kg grain per kg P and 65 kg grain per kg K. For summer maize, 20.3 kg N, 4.4 kg P, 15.9 kg K were needed to produce 1000 kg maize grain in the linear part, and the corresponding IE were
Starting Page	115
Ending Page	125
Page Count	11
File Format	PDF HTM / HTML
DOI	10.1016/j.fcr.2013.06.006
Volume Number	150
Alternate Webpage(s)	http://software.ipni.net/ipniweb/region/software.nsf/0/87528B363587881E85257C3E005B4570/$FILE/Xu%20et%20al%20Maize%20QUEFTS%20FCR%202013.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article