Optimization potential of phosphorus input in wheat production in China and its effects on yield, grain nutrition and ecological environment

doi:10.3969/j.issn.1004-1524.2021.08.02

Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (8): 1358-1366.DOI: 10.3969/j.issn.1004-1524.2021.08.02

• Crop Science • Previous Articles Next Articles

Optimization potential of phosphorus input in wheat production in China and its effects on yield, grain nutrition and ecological environment

LI Shunjin(), AN Yuli, CUI Yutao, LI Haoran, CHEN Xinping, ZHANG Wei^*()

College of Resources and Environment, Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China

Received:2020-12-21 Online:2021-08-25 Published:2021-08-27
Contact: ZHANG Wei

Abstract

Abstract:

In order to explore the effects of phosphorus (P) fertilizer application on wheat yield, ecological environment and human nutrition health in China, a meta-analysis was conducted by collecting published literatures to evaluate the contribution of P input to wheat yield, grain zinc (Zn) nutrition and ecological environment by using environmental energy analysis and Zn absorption model. It was shown that the application of P fertilizer averagely increased wheat yield by 21% on the national scale compared to no P applied, and the threshold of P input (based on P₂O₅, the same as below) for high yield production of wheat was 58.9 kg·hm^-2. Different regions had different thresholds due to various soil conditions and climatic factors. The threshold of P input in north China, northwest China, the middle and lower reaches of the Yangtze River, and the southwest China was 71.6, 58.1, 47.8, 60.0 kg·hm^-2, respectively.Compared to the present P input, the application of threshold of P input could save P fertilizer in the wheat production system in China by 82.07×10⁴ t per year, and it would decrease the comprehensive environmental cost more than 36 million yuan per year. In addition, the Zn mass fraction and bioavailability in wheat grain could be enhanced by 3.83 mg·kg^-1 and 2.87 mg·d^-1, respectively, under thethreshold of P input.

Key words: meta-analysis, energy analysis, environmental cost, grain zinc nutrition

CLC Number:

LI Shunjin, AN Yuli, CUI Yutao, LI Haoran, CHEN Xinping, ZHANG Wei. Optimization potential of phosphorus input in wheat production in China and its effects on yield, grain nutrition and ecological environment[J]. Acta Agriculturae Zhejiangensis, 2021, 33(8): 1358-1366.

Figures/Tables 5

Fig.1 Wheat yields with and without P fertilization The dash line represents the median value, and the hollow point represents the average value. The upper and lower edge of the box represent 75% and 25% of the total data, respectively. The upper and lower lines represent 95% and 5% of the total data, respectively. The upper of the solid points represents the vertical outliers. The values in brackets represent the number of samples.Box marked without the same letter indicates significant (P<0.05) difference between treatments.

Fig.2 Response of relative yield of wheat to P input at national scale

Fig.3 Response of relative yield of wheat to P input in different regions a,North China; b,Northwest China; c, The middle and lower reaches of Yangtze River; d, Southwest China.

Fig.4 Effect size of P input on wheat yield under different soil conditions Data in the brackets show the sample volume. Circles marked without the same letter indicates significant difference at P<0.05. SOM, Soil organic matter; AP, Available phosphorus.

Table 1 Potential and comprehensive effects of P input optimization on wheat production

地区 Region	总播种面积 Total sown area/ (10³ hm²)	平均产量 Average yield/(t· hm^-2)	平均施磷量 Average P₂O₅ input/(kg· hm^-2)	施磷量阈值 Threshold of P₂O₅ input/ (kg·hm^-2)	节肥潜力 Fertilizer saving potential/ (10⁴ t·a^-1)	直接经济成本 Direct economic cost/(10⁸ yuan·a^-1)	综合环境成本 Comprehensive environmental cost/(10⁸ yuan·a^-1)	籽粒锌质量分数 Zn mass fraction in grains/(mg· kg^-1)	籽粒锌生物有效性 Zn bioavailability in grains/ (mg·d^-1)
华北North China	12 155.7	5.90	97.8	71.6	31.92	7.29	0.14	+2.63	+2.18
长江中下游	6 384.9	5.06	95.9	47.8	30.71	7.02	0.13	+4.81	+2.44
Middle and lower reaches of Yangtze River
西北Northwest China	4 061.0	5.43	109.6	58.1	20.93	4.78	0.09	+5.15	+2.47
西南Southwest China	974.2	3.53	44.7	60.0	-1.50	-0.34	-0.01	-1.54	-1.87
合计Total	23 575.8	5.34	94.4	58.9	82.07	18.75	0.36	+3.83	+2.87

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Optimization potential of phosphorus input in wheat production in China and its effects on yield, grain nutrition and ecological environment

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