Sustainable improvement strategies for summer maize yield, nitrogen use efficiency and greenhouse gas emission intensity in the North China Plain

Wang, Hongzhang; Ren, Hao; Han, Kun; He, Qijin; Zhang, Lihua; Zhao, Yali; Liu, Yuee; Zhang, Jiwang; Zhao, Bin; Ren, Baizhao; Liu, Peng

doi:10.1016/j.eja.2022.126712

Cited by 5 publications

(2 citation statements)

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“…Previous work has shown that the average maize yield potential for the non-saline land is 13,200 kg ha −1 under the North China Plain [20]. However, in this study, the average of grain in summer maize was 5992.89 kg ha −1 under coastal saline-alkali conditions, which was much lower than under non-salinity soil.…”

Section: Discussioncontrasting

confidence: 77%

“…MacDonald et al [18] previously reported that the amount of P investment into cropland soils has exceeded the crop demand for P, leading to a global agronomic surplus of more than 13 kg P ha −1 . Evidence has shown that long-term over-fertilization of P leads to not only the degradation of soil quality [19] and the eutrophication of surface water [14] but also the achievement of sustainable agriculture [20,21]. Moreover, excessive P application tends to decrease the P-utilization efficiency (PUE) and other nutrient use efficiencies, including nitrogen (N) and potassium (K), eventually resulting in a decrease in crop yield [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Phosphate Application Rate on Grain Yield and Nutrition Use of Summer Maize under the Coastal Saline-Alkali Land

Ma,

Yuan,

Shi

et al. 2023

Agronomy

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Saline-alkali soil is a major threat to global food security. Phosphorus (P) fertilizer is essential for crop growth and yield production. Nevertheless, the optimal phosphate fertilizer application rates for summer maize under coastal saline–alkali soil are still unclear. A field experiment with five phosphate application rates (0, 45, 90, 135, and 180 kg ha−1, referred to as T1, T2, T3, T4, and T5, respectively) was conducted during the 2018–2020 summer maize seasons study the effects of phosphate rates on the grain yield, biomass, and nitrogen (N), P and potassium (K) accumulation, and N, P, and K physiological efficiency (denoted as NPE, PPE and KPE, respectively). Results showed that P application notably improved maize grain and biomass yield, the total uptake of N, P, K, and NPE and KPE across three seasons. As the P addition increased to 135 kg ha−1, the grain yield achieved a maximum of 7168.4 kg ha−1, with an average NPE of 2.15 kg kg−1, PPE of 0.19 kg kg−1, and KPE of 1.49 kg kg−1. However, PPE continuously decreased with the input of phosphate. P application rates exceeding 135 kg ha−1 were not considered effective due to a decline in grain yield, nutrient uptake, and NPE. Furthermore, the effect of the planting season was significant on the total uptake of N and K, and the use efficiency of N, P, and K. TOPSIS revealed that a phosphate application rate of 90–135 kg ka−1 was the optimal pattern for maize production. These results may give a theoretical basis for the phosphate management of maize production in saline–alkali soil.

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Section: Discussioncontrasting

confidence: 77%