Green manure application improves rice growth and urea nitrogen use efficiency assessed using 15N labeling

2019 ◽  
Vol 65 (5) ◽  
pp. 511-518 ◽  
Author(s):  
Xiangtian Meng ◽  
Yaying Li ◽  
Yang Zhang ◽  
Huaiying Yao
Keyword(s):  
Nitrogen Use Efficiency ◽  
Green Manure ◽  
Nitrogen Use ◽  
Manure Application ◽  
Urea Nitrogen ◽  
Rice Growth ◽  
15N Labeling ◽  
Use Efficiency

scholarly journals Nitrogen Use Efficiency and Excretion in Grazing Cows with High and Low Milk Urea Nitrogen Breeding Values

2021 ◽  
Vol 13 (17) ◽  
pp. 9827
Author(s):  
Martín Correa-Luna ◽  
Daniel Donaghy ◽  
Peter Kemp ◽  
Michael Schutz ◽  
Nicolás López-Villalobos
Keyword(s):  
Nitrogen Use Efficiency ◽  
Genetic Selection ◽  
N Losses ◽  
Nitrogen Use ◽  
Urea Nitrogen ◽  
Breeding Values ◽  
Body Tissues ◽  
Milk Urea ◽  
Use Efficiency ◽  
Milk Urea Nitrogen

Milk urea nitrogen content is moderately heritable and is phenotypically related to urine nitrogen (UN). Based on this relationship, it has been suggested that genetic selection for lower milk urea nitrogen in grazing dairy cows could decrease UN concentration thereby reducing nitrogen excretions into the ground. The objective of this study was to compare the nitrogen use efficiency (NUE) and excretion in grazing cows with high and low milk urea nitrogen breeding values (MUNBV) in two farms of contrasting farming intensity. On the high-intensity farm (HIF) 68 and 70 cows with low and high MUNBV, respectively, were fed higher levels of supplementation and milked twice-daily, while on the low-intensity farm (LIF) 82 and 86 cows with low and high MUNBV, respectively, were fed lower levels of supplementation milked once-daily. Nitrogen use efficiency (g/g) was calculated as the ratio of daily milk N to daily N intake. Daily N intake (g/day) was derived from feed intake estimates based on energy requirements. The UN (g/day) was estimated by back-calculation from dietary N and subtracting milk N, faecal N, and N retained in body tissues. Irrespective of farm, cows with low MUNBV had significantly lower MY and milk urea nitrogen (p < 0.001) but this was not linked to significantly less UN. In the LIF, cows with low MUNBV had lower NUE (p < 0.001) than cows with high MUNBV, and this was explained by the reduced protein yield (p < 0.001). Selecting cows for low MUNBV was not an effective tool to reduce N losses and to increase the NUE in two dairy farms of contrasting farming intensity.

scholarly journals Effects of Alternate Irrigation with Saline and Non-Saline Water on Sorghum Crop Manured with Elaeagnus angustifolia Leaves Using 15N

2017 ◽  
Vol 11 (1) ◽  
pp. 24-34 ◽  
Author(s):  
Farid Al-Ain ◽  
Mohamad Al-Chamma'a ◽  
Fawaz Kurdali
Keyword(s):  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Green Manure ◽  
Saline Water ◽  
Agricultural Practice ◽  
Elaeagnus Angustifolia ◽  
Irrigation Systems ◽  
Nitrogen Use ◽  
Different Types ◽  
Use Efficiency

Background:A pot experiment was conducted to determine the effects of alternate irrigation with saline (S) and fresh (F) water on growth, nitrogen uptake and nitrogen use efficiency in Sorghum crop (Sorghum bicolorL.) manured withElaeagnus angustifolialeaves (GM) using15N.Method:Five types of irrigation systems abbreviated as (F, 2F:1S, 1F:1S, 1F:2S and S) and one rate of Green Manure (GM) were employed.Result:Results showed reductions in both Dry Matter yield (DM) and nitrogen uptake (NY) in sorghum grown under different types of irrigation systems as compared with the control (F). The reduction rates of these two parameters increased with increasing number of irrigations with saline water. However,E. angustifolialeaves applied as green manure mitigated the harmful effect of salinity on plant growth parameters. The percent increments as a result of GM application were 9, 19, 43, 43 and 65% for DM, and 33, 30, 42, 36 and 60% for NY in F, 2F:1S, 1F:1S, 1F:2S and S, respectively. Nitrogen use efficiency of added green manure ranged between 25 and 47% in the different types of irrigation systems. Our results indicated that increment of NY in green manured sorghum plants was mainly attributed to its nitrogen availability. According to the availability of S and F water resources, and the economic returns aimed by farmers in the semi-arid regions, it is recommended to use (2F:1S, 1F:1S and 1F:2S) in combination withE. angustifolialeaf GM. Such a procedure can be considered as a promising agricultural practice to improve yield with a proper water resource investment.

Humic acid-modified bentonite composite material enhances urea-nitrogen use efficiency

Chemosphere ◽  
2020 ◽  
Vol 255 ◽  
pp. 126976 ◽  
Author(s):  
Yuwen Shen ◽  
Shuying Jiao ◽  
Zheng Ma ◽  
Haitao Lin ◽  
Wensheng Gao ◽  
...  
Keyword(s):  
Composite Material ◽  
Humic Acid ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Urea Nitrogen ◽  
Modified Bentonite ◽  
Use Efficiency

Long-Term Evaluation of Manure Application on Maize Yield and Nitrogen Use Efficiency in China

2011 ◽  
Vol 75 (4) ◽  
pp. 1562-1573 ◽  
Author(s):  
Yinghua Duan ◽  
Minggang Xu ◽  
Bairen Wang ◽  
Xueyun Yang ◽  
Shaomin Huang ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Maize Yield ◽  
Nitrogen Use ◽  
Manure Application ◽  
Term Evaluation ◽  
Use Efficiency

Long-term rice-rice-rape rotation optimizes 1,2-benzenediol concentration in rhizosphere soil and improves nitrogen-use efficiency and rice growth

2019 ◽  
Vol 445 (1-2) ◽  
pp. 23-37 ◽  
Author(s):  
Sheng Lu ◽  
Haixing Song ◽  
Chunyun Guan ◽  
Joe Eugene Lepo ◽  
Zhimin Wu ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Rhizosphere Soil ◽  
Nitrogen Use ◽  
Rice Growth ◽  
Use Efficiency

ROLE OF CONSERVATION AGRICULTURE IN IMPROVING PRODUCTION WATER AND NITROGEN EFFICIENCY OF WHEAT UNDER RAINFED CONDITIONS

2020 ◽  
Vol 51 (4) ◽  
pp. 1139-1148
Author(s):  
Othman & et al.
Keyword(s):  
Crop Rotation ◽  
Nitrogen Use Efficiency ◽  
Agricultural Research ◽  
Research Work ◽  
Conservation Agriculture ◽  
Nitrogen Efficiency ◽  
Research Station ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Use Efficiency

The research work was conducted in Izra’a Research station, which affiliated to the General Commission for Scientific Agricultural Research (GCSAR), during the growing seasons (2016 – 2017; 2017 – 2018), in order to evaluate the response of two durum wheat verities (Douma3 and Cham5) and two bread wheat varieties (Douma4 and Cham6) to Conservation Agriculture (CA) as a full package compared with Conventional Tillage system (CT) under rainfed condition using lentils (Variety Edleb3) in the applied crop rotation. The experiment was laid according to split-split RCBD with three replications. The average of biological yield, grain yield,  rainwater use efficiency and nitrogen use efficiency was significantly higher during the first growing season, under conservation agriculture in the presence of crop rotation, in the variety Douma3 (7466 kg. ha-1, and 4162kg. ha-1, 19.006 kg ha-1 mm-1,  39.62 kg N m-2respectively). The two varieties Douma3 and Cham6 are considered more responsive to conservation agriculture system in the southern region of Syria, because they recorded the highest grain yields (2561, 2385 kg ha-1 respectively) compared with the other studied varieties (Cham5 and Douma4) (1951 and 1724 kg ha-1 respectively). They also exhibited the highest values of both rainwater and nitrogen use efficiency.

Sign in / Sign up

Export Citation Format

Share Document