Americas and Oceania Group - International Plant Nutrition Institute

Asia and Africa Group
China
Northcentral Region: Dr. Ping He
Nutrient Expert-based Fertilizer Recommendations for Winter Wheat in Hebei
Project Leader: Liu Mengchao, Hebei Academy of Agricultural Sciences Soil and Fertilizer Institute, Shijiazhuang.
E-mail: lmchao1758@sohu.com
Project Cooperators: Chuanjie Li, Suli Xing, and Baowen Han
This study was conducted to validate Nutrient Expert (NE)-based fertilizer recommendations for winter
wheat in farmer fields and compare them with farmer fertilizer practice (FFP). For this, thirty two (32) onfarm
experiments were conducted in four different counties in Xinji, Hebei Province. NE-based fertilizer
recommendation plots received on average 135-52-60 kg N-P 2 O 5 -K 2 O/ha, respectively, while farmer fertilizer
practice (FFP) plots received an average of 278-42-24 kg N-P 2 O 5 -K 2 O/ha, respectively.
First year results of the study showed that although grain yields in NE (7.6 t/ha) and FFP (7.4 t/ha)
treatments were statistically similar, the profit obtained was higher in NE (USD 2,439/ha) when compared
with FFP (USD 2,281/ha). Moreover, significantly higher agronomic efficiency of N (8.8 kg/kg), N recovery
efficiency (29.4%), and partial factor productivity (56.8 kg/kg) were obtained using NE-based fertilizer
recommendations than using FFP, where the corresponding values were 3.2 kg/kg, 14.2%, and 27 kg/kg. The
study demonstrated that NE was an effective fertilizer recommendation method in Hebei. Hebei-NMBF
Nutrient Expert-based Fertilizer Recommendations for Winter Wheat and Spring Maize in Shanxi
Project Leader: Hongting Wang, Shanxi Academy of Agricultural Sciences Soil and Fertilizer Institute, Taiyuan, Shanxi.
E-mail: ting_tfs@163.com, htwang@ppi.caas.ac.cn, htwangwb@public.ty.sx.cn
Project Cooperator: Bin Wang
This study was conducted to validate Nutrient Expert (NE)-based fertilizer recommendations for winter
wheat and spring maize in farmer fields and compare them with farmer fertilizer practice (FFP). For this, 11
on-farm experiments were conducted in Linfen, Shanxi province. NE-based fertilizer recommendation plots
received on average 137-67-78 kg N-P 2 O 5 -K 2 O/ha for wheat and 172-46-58 kg N-P 2 O 5 -K 2 O/ha for maize,
respectively, while farmer fertilizer practice (FFP) plots received an average of 262-110-28 kg N-P 2 O 5 -K 2 O/
ha for wheat and 244-26-18 kg N-P 2 O 5 -K 2 O/ha for maize, respectively.
First year results of the study showed that grain yields and profits in NE (8.3 t/ha and USD 2,773/ha for
wheat and 9.7 t/ha and USD 3,284/ha for maize, respectively) and FFP (8.6 t/ha and USD 2,789/ha for
wheat and 9.5 t/ha and USD 3,236/ha for maize, respectively) treatments were statistically similar. However,
significantly higher agronomic efficiency of N (11.3 kg/kg for wheat and 7.2 kg/kg for maize), N recovery
efficiency (37.3% for wheat and 25.7%% for maize), and partial factor productivity (63.9 kg/kg for wheat
and 56.5 kg/kg for maize) were obtained using NE-based fertilizer recommendations than using FFP, where
the corresponding values were 7.4 kg/kg and 5.4 kg/kg, 26.6% and 17.9%, and 36.6 kg/kg and 44.3 kg/kg for
wheat and maize, respectively. With NE, 47.7% and 29.5% less fertilizer N was used than that used in FFP for
wheat and maize, respectively. The study demonstrated that NE was an effective fertilizer recommendation
method in Shanxi. Shanxi-NMBF
IPNI Interpretive Summaries 81