scholarly journals Comparison of early season crop types for wheat production and nitrogen use efficiency in the Jianghan Plain in China

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11189
Author(s):  
Rui Yang ◽  
Ke Liu ◽  
Shiying Geng ◽  
Chengxiang Zhang ◽  
Lijun Yin ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Nitrogen Use Efficiency ◽  
Cropping Systems ◽  
Cropping System ◽  
Nitrogen Management ◽  
Nitrogen Accumulation ◽  
Jianghan Plain ◽  
Nitrogen Use ◽  
Wheat Production ◽  
Use Efficiency

The rice-wheat (RW) cropping system is one of the most prevalent double-cropping systems used to farm the Jianghan Plain in China. However, it can lead to low wheat yields and reduced nitrogen use efficiency compared with dryland wheat (DW). We evaluated wheat yield and nitrogen use efficiency for two rotations (summer rice-winter wheat and summer soybean-winter wheat) from 2017 to 2019 and applied the results to improve nitrogen management for planting wheat after rice in the Jianghan Plain. Field experiments were conducted over two years with two nitrogen treatments: traditional nitrogen management (M1: 90 kg N ha−1 was applied at sowing and jointing, respectively ) and optimized nitrogen management (M2: 60 kg N ha−1 was applied at sowing, wintering and jointing, respectively). The highest total wheat production was achieved under M2 for both cropping systems and the two-year average yield was 6,128 kg ha−1 in DW and 6,166 kg ha−1 in RW. The spike number in DW was 15% higher than RW in M1 and 13% higher in M2, but the kernel per spike and 1,000-grain weight was lower than RW. The nitrogen accumulation of DW was 24% higher than RW in M1 and 33% in M2. Compared with RW, DW had higher NO3− content in the soil surface layer (0–20 cm) and a higher root length density (RLD) in the deeper layer (40–60 cm), which may account for the higher N uptake in DW. Our results show that the grain yield of RW was comparable to that of DW by optimum nitrogen management. The rice-wheat cropping system combined with optimum nitrogen management may be of economic and agronomic benefit to the wheatbelt in the Jianghan Plain in China.

scholarly journals Understanding and reconciling different approaches for quantifying nitrogen use efficiency in cropping systems

2020 ◽  
Author(s):  
Zhi Quan ◽  
Xin Zhang ◽  
Yunting Fang ◽  
Eric Davidson
Keyword(s):  
Nitrogen Use Efficiency ◽  
Cropping Systems ◽  
Spatial Scales ◽  
Cropping System ◽  
15N Tracer ◽  
Nitrogen Use ◽  
Legacy Effect ◽  
Use Efficiency ◽  
The Difference ◽  
N Management

Abstract Nitrogen use efficiency (NUE) has been widely used in cropping systems to study nitrogen (N) cycles and inform N management on various spatial scales, from a single plant to the globe. Although the number of NUE studies is growing, interpretation of results is unfortunately hindered by widely differing definitions and quantification methods among studies, suggesting a pressing need for harmonization of approaches. Here, we proposed a conceptual framework to understanding the differences and connections among three major approaches for determining NUE, namely, the difference approach, 15N tracer approach, and N balance approach. Using the Chinese cereal cropping system as an example, we demonstrated that the results of those NUE assessments could be very different even for the same cropping system (0.32, 0.24, and 0.52, respectively). Such a difference is attributable largely to the soil legacy effect and could be reduced by extending the observations for a longer term. This study provides the necessary understanding to reconcile NUE values from different approaches and consequently to better inform N management in cropping systems.

scholarly journals The aftereffect of winter wheat on pea yield, nitrogen surplus and nitrogen use efficiency in different cropping systems

2020 ◽  
Vol 29 (5) ◽  
Author(s):  
Ivo Voor ◽  
Maarika Alaru ◽  
Viacheslav Eremeev ◽  
Evelin Loit
Keyword(s):  
Winter Wheat ◽  
Nitrogen Use Efficiency ◽  
Cropping Systems ◽  
Field Pea ◽  
Catch Crops ◽  
Nitrogen Surplus ◽  
Mineral N ◽  
Nitrogen Use ◽  
Organic Systems ◽  
Use Efficiency

The present study is part of a framework for researching the use of the field pea in cropping systems in order to improve its economic and environmental output. The specific aim was to investigate the effect of differently fertilised preceding winter wheat on subsequent field pea output in the same crop rotation. The field experiment was conducted in Tartu county, Estonia, in 2012–2017. Seven different cropping systems were investigated: four conventional with different treatments of mineral nitrogen fertilisers and three organic including catch crops and cattle manure treatment. The DM yield of field pea in winter wheat mineral N treatments 50–150 kg N ha-1 was 2699–2852 kg ha-1, which was 33% higher than in the organic systems. There were no significant differences (p < 0.05) in nitrogen use efficiency (NUE) and N surplus between 50–150 kg N ha-1. The first 20 kg ha-1 mineral N with P25 and K95 gave a significantly higher pea yield compared to the treatment without mineral N. The catch crops reduced agronomic NUE and increased N surplus in the organic cropping systems.  

Effect of In-Season Nitrogen Management Strategy on Maize Grain Yield and Nitrogen Use Efficiency

2011 ◽  
Vol 37 (1) ◽  
pp. 152-157 ◽  
Author(s):  
You-Liang YE ◽  
Yu-Fang HUANG ◽  
Chun-Sheng LIU ◽  
Ri-Tao QU ◽  
Hai-Yan SONG ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Management Strategy ◽  
Nitrogen Management ◽  
Nitrogen Use ◽  
Maize Grain Yield ◽  
Use Efficiency ◽  
Maize Grain
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