Effects of Nitrogen Fertilizer Management on Yield and Nitrogen Use Efficiency in Winter Wheat Growing on Dryland with Plastic Film Mulching

In dry environments, potato (Solanum tuberosum L.) is grown under mulching for water conservation and improving tuber yield and nitrogen use efficiency (NUE). A meta-analysis was conducted to determine how mulching improved tuber yield and NUE in potato and how yield and NUE is influenced by fertilization, tillage practices, and growing environment in China. A search of peer-reviewed publications was performed to collect data on the effects of mulching on yield and NUE in potato grown in China. The data included were from field studies with a mulching and a no mulching treatment and data on tuber yield and NUE. A total of 169 publications (17 in English and 152 in Chinese) containing 1802 observations from 105 sites were compiled into the dataset. Mulching significantly increased both tuber yield and NUE by an average of 24% compared to no mulching, respectively. Plastic film mulching was more effective in improving yield and NUE than straw mulching. The yield and NUE increase were highest under plastic film mulching on ridge-furrow plots and straw mulching on flat plots. Mulching was more effective at improving yield and NUE in the Northwest dryland region at a plant density between 55,000 and 70,000 plants ha−1 and with application of synthetic N and P2O5 at rates of 100−200 kg ha−1, K fertilization at 0−100 kg K2O ha−1, and without organic fertilization. Integrated use of organic fertilizer and mulching was found to reduce synthetic N and P fertilizer input by 50% and K fertilizer input by 100% for production without affecting yield and NUE. These results demonstrate that mulching increases yield and NUE in potato in China, but the benefits occur when the growing region, tillage, and fertilization practices are appropriately considered.

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Effect of plastic film mulching on maize productivity and nitrogen use efficiency under organic farming in South Korea

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.147503 ◽

2021 ◽

pp. 147503

Author(s):

Jeong Gu Lee ◽

Ho Gyeong Chae ◽

Hyun Young Hwang ◽

Pil Joo Kim ◽

Song Rae Cho

Keyword(s):

South Korea ◽

Organic Farming ◽

Nitrogen Use Efficiency ◽

Plastic Film ◽

Nitrogen Use ◽

Plastic Film Mulching ◽

Maize Productivity ◽

Use Efficiency ◽

Film Mulching

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Optimized split nitrogen fertilizer increase photosynthesis, grain yield, nitrogen use efficiency and water use efficiency under water-saving irrigation

Scientific Reports ◽

10.1038/s41598-020-75388-9 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Zhen Zhang ◽

Yongli Zhang ◽

Yu Shi ◽

Zhenwen Yu

Keyword(s):

Winter Wheat ◽

Grain Yield ◽

Water Use Efficiency ◽

Water Use ◽

Nitrogen Use Efficiency ◽

Nitrogen Fertilizer ◽

Water Saving ◽

Nitrogen Use ◽

Use Efficiency ◽

Nitrogen Ratio

AbstractThis study aims to investigate optimization of the basal-top-dressing nitrogen ratio for improving winter wheat grain yield, nitrogen use efficiency, water use efficiency and physiological parameters under supplemental irrigation. A water-saving irrigation (SI) regime was established and sufficient irrigation (UI) was used as a control condition. The split-nitrogen regimes used were based on a identical total nitrogen application rate of 240 kg ha−1 but were split in four different proportions between sowing and the jointing stage; i.e. 10:0 (N1), 7:3 (N2), 5:5 (N3) and 3:7 (N4). Compared with the N1, N2 and N4 treatments, N3 treatment increased grain yield, nitrogen and water use efficiencies by 5.27–17.75%, 5.68–18.78% and 5.65–31.02%, respectively, in both years. The yield advantage obtained with the optimized split-nitrogen fertilizer application may be attributable to greater flag leaf photosynthetic capacity and grain-filling capacity. Furthermore, the N3 treatment maintained the highest nitrogen and water use efficiencies. Moreover, we observed that water use efficiency of SI compared with UI increased by 9.75% in 2016 and 10.79% in 2017, respectively. It can be concluded that SI along with a 5:5 basal-top-dressing nitrogen ratio should be considered as an optimal fertigation strategy for both high grain yield and efficiency in winter wheat.

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