scholarly journals Effect of nitrification inhibitors on mitigating N 2 O and NO emissions from an agricultural field under drip fertigation in the North China Plain

2017 ◽  
Vol 598 ◽  
pp. 87-96 ◽  
Author(s):  
Di Tian ◽  
Yuanyuan Zhang ◽  
Yizhen Zhou ◽  
Yujing Mu ◽  
Junfeng Liu ◽  
...  
Keyword(s):  
North China Plain ◽  
North China ◽  
Nitrification Inhibitors ◽  
Agricultural Field ◽  
The North ◽  
The North China Plain ◽  
No Emissions ◽  
Drip Fertigation

scholarly journals Nitrous oxide emissions from maize-wheat field during four successive years in the North China Plain

2013 ◽  
Vol 10 (11) ◽  
pp. 18337-18358 ◽  
Author(s):  
Y. Zhang ◽  
Y. Mu ◽  
Y. Zhou ◽  
J. Liu ◽  
C. Zhang
Keyword(s):  
North China Plain ◽  
North China ◽  
N2o Emission ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Agricultural Field ◽  
Wheat Field ◽  
The North ◽  
The North China Plain ◽  
N2o Fluxes

Abstract. Agricultural soil with fertilization is a main anthropogenic source for atmospheric N2O. N2O fluxes from a maize-wheat field in the North China Plain (NCP) were investigated for four successive years using static chamber method. The annual N2O fluxes from control (without fertilization) and fertilization plots were 1.5 ± 0.2 and 9.4 ± 1.7 kg N ha−1 yr−1 in 2008–2009, 2.0 ± 0.01 and 4.0 ± 0.03 kg N ha−1 yr−1 in 2009–2010, 1.3 ± 0.02 and 5.0 ± 0.3kg N ha−1 yr−1 in 2010–2011, and 2.7 ± 0.6 and 12.5 ± 0.1 kg N ha−1 yr−1 in 2011–2012, respectively. Fertilizer-induced emission factors (EFs) in the corresponding years were 2.4, 0.60, 1.1 and 2.9%, respectively. Significant linear correlation between fertilized-induced N2O emission (Y, kg N ha−1 yr−1) and rainfall 4 day before and 10 days after fertilization (X, mm) was found as Y = 0.04767X − 1.06453 (N = 4, R2 = 0.99241, P = 0.00253). Therefore, the remarkable interannual variations of N2O emissions and the EFs from the agricultural field were mainly ascribed to the rainfall. The total N2O emission from the agricultural field in the NCP was estimated to be 144 Gg N yr−1 based on the average flux derived from the measurements of four years, and the fertilizer-induced N2O emission accounted for about 76% (110 Gg N yr−1) of total emission.

scholarly journals Crop Water Production Functions for Winter Wheat with Drip Fertigation in the North China Plain

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 876
Author(s):  
Xiaojun Shen ◽  
Guangshuai Wang ◽  
Ketema Tilahun Zeleke ◽  
Zhuanyun Si ◽  
Jinsai Chen ◽  
...  
Keyword(s):  
Winter Wheat ◽  
North China Plain ◽  
North China ◽  
Field Experiments ◽  
Nitrogen Levels ◽  
Growing Seasons ◽  
The North ◽  
The North China Plain ◽  
Irrigation Levels ◽  
Drip Fertigation

During four consecutive growing seasons (2014–2018), field experiments were conducted in the North China to determine winter wheat production function. The field experiments were carried out using winter wheat subjected to four N levels (N120, N180, N240, and N300) and three irrigation levels (If, I0.8f, and I0.6f). The main aims were to characterize winter wheat productivity, drought response factor Ky, and the winter wheat grain yield production functions in relation to water supply under the different N fertilizer levels. The amount of water supply (rain + irrigation) were 326–434, 333–441, 384–492, and 332–440 mm in 2014–2015, 2015–2016, 2016–2017, and 2017–2018 growing seasons, respectively. Similarly, the values of ETa (including the contribution from soil water storage) were 413–466, 384–468, 401–466, and 417–467 mm in 2014–2015, 2015–2016, 2016–2017, and 2017–2018, respectively. ETa increased as the amount of irrigation increased. The average values of If, I0.8f, and I0.6f over the four growing seasons were 459–465, 432–446, and 404–413 mm, respectively. For the same amount of irrigation, there was only small difference in ETa among different nitrogen levels; for the three irrigation levels, the values of ETa in N120, N180, N240, and N300 ranged from 384 to 466, 384 to 466, 385 to 467, and 407 to 468 mm, respectively. Water productivity values ranged from 1.69 to 2.50 kg m−3 for (rain + irrigation) and 1.45 to 2.05 kg·m−3 for ETa. The Ky linearly decreased with the increase in nitrogen amount, and the values of r were greater than 0.92. The values of Ky for winter wheat in N120, N180, N240, and N300 were 1.54, 1.41, 1.28, and 1.25, respectively. The mean value of Ky for winter wheat over the three irrigation levels and the four nitrogen levels was 1.37 (r = 0.95). In summary, to gain higher grain yield and WUE, optimal combination of N fertilizer of 180–240 kg·ha−1 and irrigation quota of 36–45 mm per irrigation should be applied for winter wheat with drip fertigation in the North China Plain.

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