scholarly journals Nitrate leaching as affected by liquid swine manure and cover cropping in sandy soil of southwestern Ontario

2004 ◽  
Vol 84 (2) ◽  
pp. 187-197 ◽  
Author(s):  
B. R. Ball-Coelho ◽  
R. C. Roy ◽  
A. J. Bruin

To assess the risk that liquid swine manure (LSM) application posed to groundwater quality and determine how to manage excess nitrates, LSM pre-plant injected at 75% (LSMlow) and >100% (LSMhigh) of corn (Zea mays L.) N requirements was compared to inorganic fertilizer (Fert), with (RC) or without (NC) a rye (Secale cereale L.) cover crop in 2 dry years (1999, 2001) and 1 wet year (2000) on sandy soil in Ontario. Corn yields in LSM and Fert treatments were comparable each year. When drainage potential was high, solution nitrates below the root zone in Fert (14 mg L-1) > LSM (7 mg L-1) in 1999, but in LSM (39 mg L-1) > Fert (13 mg L-1) in 2000. Occasionally in 2001, solution nitrates in LSMhigh > LSMlow and/or Fert plots, but drainage potential was low. Earlier N application in LSM (pre-plant) than Fert (77% of N sidedressed) plots in relation to rain events may have increased solution nitrates in LSM plots in 2000. Rye cover reduced solution nitrates from 8.8 mg L-1 (NC) to 4.3 mg L-1 (RC, average of all dates), regardless of nutrient source. In-season risk of NO3 leaching can be reduced by split application of N between pre-plant and sidedress, while overseeding cereal rye into standing corn minimizes leaching post-harvest (fall and spring). Key words: Zea mays, Secale cereale, pre-sidedress nitrate test, swine manure, nitrate leaching

2019 ◽  
Vol 99 (6) ◽  
pp. 958-960
Author(s):  
Douglas J. Cattani

Perennial cereal rye (Secale cereale L. × Secale montanum Guss.) has been utilized for forage production and this study investigated its perennial grain production potential in Manitoba. Two seeding years at Carman, MB, showed poor winter survival and high ergot occurrence. Therefore, this species is not recommended for grain production in Manitoba.


1997 ◽  
Vol 77 (3) ◽  
pp. 443-451 ◽  
Author(s):  
B. R. Ball-Coelho ◽  
R. C. Roy

Non-irrigated corn (Zea mays L.) produced on coarse-textured soils during droughty years can result in excess NO3 available for leaching. To evaluate the effect of overseeding cereal rye (Secale cereale L.) into corn on yields, NO3 leaching and a pre-sidedress nitrate test (PSNT), we broadcast rye seed (Aug. 1993, 1994 and 1995) into conventional tillage (CT) and no-tillage (NT) corn receiving six fertilizer N rates. There was no corn yield penalty with the cover crop. Corn grain yields and the extent to which NO3 leaching was reduced by the rye cover depended on rainfall. With the rye (compared with no rye) subsoil solution NO3 concentrations were: unchanged (fall 1994) following above normal rainfall and corn yields; reduced by 8 mg NO3N L−1 (fall 1995) following intermediate rainfall and yields; and reduced by 28 mg NO3-N L−1 (fall 1993) and 11 mg NO3-N L−1 (spring 1994) following the driest growing season (average of CT and NT). Improved N availability with the rye was detected by a PSNT under CT, but not under NT. Therefore sidedress N rates can be adjusted for release of rye residue-N under CT, and potential NO3 contamination of groundwater can be reduced by overseeding winter rye into both CT and NT corn systems. Key words:Zea mays, Secale cereale, pre-sidedress nitrate test, tillage, nitrogen fertilization


2018 ◽  
Vol 28 (4) ◽  
pp. 341-358 ◽  
Author(s):  
Dagnija Vecstaudza ◽  
Lelde Grantina-Ievina ◽  
Galina Makarenkova ◽  
Raimonds Kasparinskis ◽  
Turs Selga ◽  
...  

2003 ◽  
Vol 83 (2) ◽  
pp. 363-369 ◽  
Author(s):  
S. N. Acharya ◽  
Z. Mir ◽  
J. R. Moyer ◽  
B. R. Orshinsky ◽  
J. E. Thomas

Perennial cereal rye (PC rye) is being developed at Lethbridge Research Centre as a new forage crop. The first Canadian cultivar of this crop (ACE-1), tested as LRC 96-1, will have the distinction of being the first North American cultivar of PC rye and the only perennial cereal crop specifically developed for forage production. PC rye was originally developed in Germany by crossing rye (Secale cereale L.) with a perennial wild rye (Secale montanum L.) and then backcrossing the F1 with Secale cereale L. while selecting for a perennial nature. In field trials, ACE-1 PC rye has produced economically viable biomass yields for 3 yr under southern Alberta growing conditions. It has similar yield and quality to barley, which is grown extensively for silage in the Canadian prairies. For proper land management and adequate forage production, ACE-1 PC rye should be seeded from mid-September to mid-October in narrow (17.5 cm) rows at a seeding rate of 80 kg ha-1. When harvested at the soft dough stage for silage it contained less crude protein (CP) and more fibre than barley; however, in vitro gas production indicates that its dry matter (DM) digestibility will be similar to that of barley. PC rye is a valuable forage crop, but it needs to be harvested earlier than the soft dough stage to obtain comparable silage quality to barley. Key words: Acid detergent fibre, crude protein, digestibility, neutral detergent fibre, perennial cereal rye, forage yield, seed yield


2018 ◽  
Vol 46 (3) ◽  
pp. 521-532 ◽  
Author(s):  
I. Marcińska ◽  
I. Czyczyło-Mysza ◽  
E. Skrzypek ◽  
M. Warchoł ◽  
K. Zieliński ◽  
...  

2018 ◽  
Vol 16 (S1) ◽  
pp. S273-S283
Author(s):  
Z. Mami-Soualem ◽  
N. Brixi ◽  
C. Beghdad ◽  
M. Belarbi

Le changement des habitudes alimentaires au cours de ces dernières années a abouti à l’apparition des maladies dites de civilisation, parmi elles le diabète sucré. Des approches diétothérapeutiques privilégient la consommation des produits céréaliers sous la forme la plus complète possible. Ce travail a pour but de tester l’efficacité des régimes expérimentaux préparés à base des grains complets des deux céréales, le sorgho (Sorghum bicolor L.) et le seigle (Secale cereale L.), sur la correction de l’hyperglycémie et des marqueurs du stress oxydant associés au diabète chez le rat mâle Wistar. Les résultats montrent que les rats diabétiques, soumis au régime seigle pendant quatre semaines, présentent une diminution significative de la glycémie qui atteint les 53,95 % à la fin de l’expérimentation, ce qui fait que leur taux en glycémie se rapproche de celui des normoglycémiques. Le sorgho blanc présente, d’une part, une diminution significative de la peroxydation lipidique intracellulaire et, d’autre part, une augmentation de l’activité de la glutathion peroxydase, la glutathion réductase ainsi que la vitamine C. Ces approches méthodologiques peuvent, en améliorant la connaissance de l’importance des céréales (fibres alimentaires solubles et des polyphénols) dans l’évolution du diabète, aboutir à des recommandations et à une éducation nutritionnelle du diabétique.


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