scholarly journals Improving Complementarity Effect of Legume Intercrop by Earthworm Facilitation for Wheat Performance

2018 ◽  
Vol 10 (12) ◽  
pp. 1
Author(s):  
Baptiste Drut ◽  
Nathalie Cassagne ◽  
Mario Cannavacciuolo ◽  
Gaëtan Le Floch ◽  
José F. Cobo-Díaz ◽  
...  
Keyword(s):  
Plant Competition ◽  
Lumbricus Terrestris ◽  
Triticum Aestivum L ◽  
Complementarity Effect ◽  
N Accumulation ◽  
Niche Complementarity ◽  
Crop Cover ◽  
Relative Interaction Index ◽  
Use Efficiency ◽  
Endogeic Earthworms

Intercrops and crop mixtures are considered to be a way to increase nitrogen use efficiency by promoting niche complementarity and facilitation, reducing the input of fertilizers and herbicides, which are important factors when considering the effects of climate change. However, interactions between crop communities and soil functional diversity also have major effects on crop cover function. Our study aimed to investigate the simultaneous effects of plant composition and presence of earthworms on the growth (roots and shoots) of wheat (Triticum aestivum L.). Mesocosms filled with soil were sown with either 6 wheat plants of the same cultivar, or 6 plants of 3 different wheat cultivars, or 3 wheat plants of 3 different cultivars with 3 clover plants (Trifolium hybridum L.). A part of the mesocosms was inoculated with either endogeic earthworms (Aporrectodea caliginosa S.) or a mixture of endogeic and anecic earthworms (Lumbricus terrestris S.). A relative interaction index was calculated to highlight competition strength between plants with or without earthworms. The presence of different cultivars had no influence on wheat performance, but with clover, plant competition decreased to the benefit of wheat biomass and N accumulation. Earthworms also reduced the competitive strength between wheat plants in mixed-cultivar mesocosms and in intercropping. In intercrops with clover, wheat performance was improved as a result of niche complementarity and earthworm facilitation for N resource. Our results suggest that the plant functional group, such as legumes, and earthworm communities work synergistically to improve wheat yields.

scholarly journals Soil water cycle and crop water use efficiency after long-term nitrogen fertilization in Loess Plateau

2012 ◽  
Vol 59 (No. 1) ◽  
pp. 1-7 ◽  
Author(s):  
B. Wang ◽  
W. Liu ◽  
Q. Xue ◽  
T. Dang ◽  
C. Gao ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Soil Water ◽  
Water Use ◽  
Water Cycle ◽  
Triticum Aestivum L ◽  
Growing Seasons ◽  
Water Recharge ◽  
Use Efficiency ◽  
N Management

The objective of this study was to investigate the effect of nitrogen (N) management on soil water recharge, available soil water at sowing (ASWS), soil water depletion, and wheat (Triticum aestivum L.) yield and water use efficiency (WUE) after long-term fertilization. We collected data from 2 experiments in 2 growing seasons. Treatments varied from no fertilization (CK), single N or phosphorus (P), N and P (NP), to NP plus manure (NPM). Comparing to CK and single N or P treatments, NP and NPM reduced rainfall infiltration depth by 20–60 cm, increased water recharge by 16–21 mm, and decreased ASWS by 89–133 mm in 0–300 cm profile. However, crop yield and WUE continuously increased in NP and NPM treatments after 22 years of fertilization. Yield ranged from 3458 to 3782 kg/ha in NP or NPM but was 1246–1531 kg/ha in CK and single N or P. WUE in CK and single N or P treatments was < 6 kg/ha/mm but increased to 12.1 kg/ha/mm in a NP treatment. The NP and NPM fertilization provided benefits for increased yield and WUE but resulted in lower ASWS. Increasing ASWS may be important for sustainable yield after long-term fertilization.

scholarly journals Effect of subsoiling on tillers, root density and nitrogen use efficiency of winter wheat in loessal soil

2019 ◽  
Vol 65 (No. 9) ◽  
pp. 456-462
Author(s):  
Guohua Lv ◽  
Wei Han ◽  
Hanbo Wang ◽  
Wenbo Bai ◽  
Jiqing Song
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Triticum Aestivum L ◽  
Root Penetration ◽  
Deep Soil ◽  
Humid Climate ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Plough Pan

A 2-year field experiment was carried out in loessal soil in a semi-humid climate to research winter wheat (Triticum aestivum L.) growth and nitrogen use efficiency. The result showed that subsoiling increased root penetration and promoted deep soil water absorption, which resulted in high resilience to the adverse dry climate. Soil NO<sub>3</sub><sup>–</sup>-N residue throughout the profile was decreased but increased in rotary tillage. Grain yield was significantly increased by 21.9% and 11.3% in 2016 and 2017, respectively, mainly due to the significantly larger spikes per hectare and grains per spike. Nitrogen use efficiency was significantly improved by 26.7% in 2016 and 13.8% in 2017. For loessal soil in semi-humid climate, breaking the plough pan was necessary, and it was useful for the increase of grain yield and nitrogen use efficiency.

scholarly journals The Arabidopsis Transcription Factor CDF3 Is Involved in Nitrogen Responses and Improves Nitrogen Use Efficiency in Tomato

2020 ◽  
Vol 11 ◽  
Author(s):  
José Domínguez-Figueroa ◽  
Laura Carrillo ◽  
Begoña Renau-Morata ◽  
Lu Yang ◽  
Rosa-V Molina ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Primary Root ◽  
Carbon Assimilation ◽  
Glutamate Synthase ◽  
N Availability ◽  
Signal Molecule ◽  
N Accumulation ◽  
Yield Efficiency ◽  
Use Efficiency ◽  
Nitrate Transporters

Nitrate is an essential macronutrient and a signal molecule that regulates the expression of multiple genes involved in plant growth and development. Here, we describe the participation of Arabidopsis DNA binding with one finger (DOF) transcription factor CDF3 in nitrate responses and shows that CDF3 gene is induced under nitrate starvation. Moreover, knockout cdf3 mutant plants exhibit nitrate-dependent lateral and primary root modifications, whereas CDF3 overexpression plants show increased biomass and enhanced root development under both nitrogen poor and rich conditions. Expression analyses of 35S::CDF3 lines reveled that CDF3 regulates the expression of an important set of nitrate responsive genes including, glutamine synthetase-1, glutamate synthase-2, nitrate reductase-1, and nitrate transporters NRT2.1, NRT2.4, and NRT2.5 as well as carbon assimilation genes like PK1 and PEPC1 in response to N availability. Consistently, metabolite profiling disclosed that the total amount of key N metabolites like glutamate, glutamine, and asparagine were higher in CDF3-overexpressing plants, but lower in cdf3-1 in N limiting conditions. Moreover, overexpression of CDF3 in tomato increased N accumulation and yield efficiency under both optimum and limiting N supply. These results highlight CDF3 as an important regulatory factor for the nitrate response, and its potential for improving N use efficiency in crops.

Wheat genotypes with high early vigour accumulate more nitrogen and have higher photosynthetic nitrogen use efficiency during early growth

2014 ◽  
Vol 41 (2) ◽  
pp. 215 ◽  
Author(s):  
Jiayin Pang ◽  
Jairo A. Palta ◽  
Gregory J. Rebetzke ◽  
Stephen P. Milroy
Keyword(s):  
Aboveground Biomass ◽  
N Uptake ◽  
Triticum Aestivum L ◽  
Early Growth ◽  
Shoot Biomass ◽  
Genotypic Differences ◽  
Wheat Genotypes ◽  
Early Vigour ◽  
Use Efficiency ◽  
N Use

Genotypic differences in early growth and nitrogen (N) uptake among 24 wheat (Triticum aestivum L.) genotypes were assessed in a field trial. At late tillering, large genetic variation was observed for shoot biomass (23–56 g m–2 ground area) and N uptake (1.1–1.8 g m–2 ground area). A strong correlation between aboveground biomass and N uptake was observed. Variation around this relationship was also found, with some genotypes having similar N uptake but large differences in aboveground biomass. A controlled environment experiment was conducted to investigate the underlying mechanisms for this variation in aboveground biomass using three vigorous genotypes (38–19, 92–11 and CV97) and a non-vigorous commercial cultivar (Janz). Vigorous genotypes had lower specific leaf N in the youngest fully expanded leaf than Janz. However, there was no difference in chlorophyll content, maximum Rubisco activity or the rate of electron transport per unit area. This suggests that Janz invested more N in non-photosynthetic components than the vigorous lines, which could explain the higher photosynthetic N use efficiency of the vigorous genotypes. The results suggest that the utilisation of wheat genotypes with high early vigour could improve the efficiency of N use for biomass production in addition to improving N uptake during early growth.

Water use of some recent bread and durum wheat cultivars in western Canada

2007 ◽  
Vol 87 (2) ◽  
pp. 289-292 ◽  
Author(s):  
H. Wang ◽  
T. N. McCaig ◽  
R. M. DePauw ◽  
J. M. Clarke ◽  
R. Lemke
Keyword(s):  
Triticum Aestivum ◽  
Drought Tolerance ◽  
Soil Water ◽  
Water Use ◽  
Triticum Turgidum ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Western Canada ◽  
Wheat Cultivars ◽  
Use Efficiency

Recently developed cultivars of Canada Western Red Spring (CWRS) wheat (Triticum aestivum L.) and Canada Western Amber Durum (CWAD) (Triticum turgidum L. var durum) produced significantly more grain than older cultivars. This production was attributed to higher harvest indices and better water use efficiency. Durum cultivars and CWRS AC Intrepid and AC Barrie extracted relatively more soil water below 55 cm, which may be advantageous in minimizing leaching and related to drought tolerance during grain-filling. Key words: Hexaploid wheat, durum, water use, soil water

Sign in / Sign up

Export Citation Format

Share Document