Controlled release of phosphorus fertilizers by small, frequent additions in water solution

1998 ◽  
Vol 78 (2) ◽  
pp. 317-320 ◽  
Author(s):  
M. Nyborg ◽  
E. D. Solberg ◽  
D. G. Pauly
Keyword(s):  
Controlled Release ◽  
Key Words ◽  
Water Solution ◽  
P Uptake ◽  
Ammonium Polyphosphate ◽  
Diammonium Phosphate ◽  
Monoammonium Phosphate ◽  
Full Dose ◽  
Key Words Barley ◽  
Phosphorus Fertilizers

Controlled release of P was investigated with barley plants grown on two soils. Phosphorus fertilizers (monoammonium phosphate [MAP], diammonium phosphate [DAP] and ammonium polyphosphate [APP]) were dissolved in water and were applied full dose at sowing; 1/22 dose every 2nd day and 1/4 dose each 11th day. Uptake of fertilizer P in barley was much greater when the P was applied every 2nd and 11th day compared to only the day of sowing. Key words: Barley, diammonium phosphate, monoammonium phosphate, P uptake, P yield, release of P

Kernel colour varies with cultivars and environments in barley

1998 ◽  
Vol 78 (2) ◽  
pp. 217-222 ◽  
Author(s):  
M. J. Edney ◽  
T. M. Choo ◽  
D. Kong ◽  
T. Ferguson ◽  
K. M. Ho ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Key Words ◽  
Western Canada ◽  
Net Blotch ◽  
Hordeum Vulgare L ◽  
Eastern Canada ◽  
Key Words Barley

Kernel colour is an important marketing trait for both malting and feed barleys. Therefore a study was initiated to investigate the kernel colour of 75 Canadian barley (Hordeum vulgare L.) cultivars at three locations (Charlottetown, Ottawa and Bentley) across Canada in 1991 and 1992. Kernel colour was measured by an Instrumar Colormet Spectrocolorimeter. Kernel colour was found to be brighter at the two locations in eastern Canada (Charlottetown and Ottawa) than at the location in western Canada (Bentley). Two-row cultivars on average were more discoloured than six-row cultivars; eastern two-row were more discoloured than western two-row. Covered barleys were less discoloured than hulless barleys in five of the six environments, but covered barleys at Bentley in 1992 were more discoloured than hulless barleys. Kernel discolouration appeared to be associated with susceptibility to net blotch for six-row cultivars. More studies are needed on kernel discolouration of barley. Key words: Barley, Hordeum vulgare, kernel colour

PHOSPHORUS UPTAKE BY ALFALFA AS INFLUENCED BY PHOSPHATE SOURCE AND MOISTURE

1962 ◽  
Vol 42 (2) ◽  
pp. 254-265 ◽  
Author(s):  
J. D. Beaton ◽  
D. W. L. Read ◽  
W. C. Hinman
Keyword(s):  
Phosphorus Uptake ◽  
Significant Negative Correlation ◽  
P Uptake ◽  
Water Soluble ◽  
Ammonium Polyphosphate ◽  
Short Term ◽  
Treated Soil ◽  
Extractable P ◽  
Phosphate Source ◽  
Soil Fertilizer

The effect of phosphate source and soil moisture during the initial soil-fertilizer reaction period on subsequent phosphorus uptake by alfalfa was investigated in a growth chamber. Phosphate-treated soils with moisture adjusted to four different tensions were stored at approximately 18 °C. for 10 weeks. Following this storage interval phosphorus uptake by alfalfa was measured using a short-term technique.Phosphorus content and phosphorus uptake by both tops and roots increased significantly when water-soluble materials such as ammonium polyphosphate, monoammonium and monocalcium phosphate were applied. Less soluble sources, i.e., hydroxyapatite and anhydrous dicalcium phosphate, were much less effective. Calcium metaphosphate produced intermediate results.Moisture content of the soil during the reaction period did not greatly alter subsequent P uptake. The water-soluble sources of phosphorus were affected to the greatest degree.Uptake of P was significantly correlated with the amount of P extracted by NaHCO3 from the treated soils. The highest degree of correlation occurred with ammonium polyphosphate treated soil. A significant negative correlation occurred with calcium metaphosphate. With the exception of the 0.8 bar treatment, moisture tension had little influence on the correlation of P uptake with NaHCO3 extractable-P.

AC Alma barley

1997 ◽  
Vol 77 (4) ◽  
pp. 635-637 ◽  
Author(s):  
T. M. Choo ◽  
R. A. Martin ◽  
K. M. Ho ◽  
G. Atlin ◽  
R. Walton ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Key Words ◽  
High Yield ◽  
Hordeum Vulgare L ◽  
Eastern Canada ◽  
Lodging Resistance ◽  
Barley Breeding ◽  
Breeding Group ◽  
Key Words Barley ◽  
Cultivar Description

AC Alma is a six-row, spring feed barley (Hordeum vulgare L.) cultivar developed by the Eastern Canada Barley Breeding Group, Agriculture and Agri-Food Canada. It has high yield and excellent lodging resistance. AC Alma performed well across Eastern Canada. Key words: Barley, Hordeum vulgare L., cultivar description, high yield, lodging resistance

scholarly journals Properties of Coated Controlled Release Diammonium Phosphate Fertilizers Prepared with the Use of Bio‐based Amino Oil

2020 ◽  
Vol 97 (7) ◽  
pp. 751-763 ◽  
Author(s):  
Asma Sofyane ◽  
Mohammed Lahcini ◽  
Abdellatif El Meziane ◽  
Mehdi Khouloud ◽  
Abdelmalek Dahchour ◽  
...  
Keyword(s):  
Controlled Release ◽  
Diammonium Phosphate ◽  
Phosphate Fertilizers

Nitrogen and phosphorus nutrition of dryland grain sorghum at Katherine, Northern Territory. 2. Effect of rate and source of phosphorus fertilizer

1978 ◽  
Vol 18 (93) ◽  
pp. 564 ◽  
Author(s):  
RJK Myers
Keyword(s):  
Field Experiments ◽  
Grain Sorghum ◽  
Northern Territory ◽  
Diammonium Phosphate ◽  
Yield Response ◽  
Growth Stages ◽  
Growth Responses ◽  
Triple Superphosphate ◽  
Monoammonium Phosphate ◽  
Nitrogen And Phosphorus

Field experiments were conducted at Katherine, Northern Territory, in 1970-71 and 1971 -72 to examine responses of dryland grain sorghum to applied phosphorus at different growth stages. In the first, the effect of rate of application up to 100 kg P ha-1 as triple superphosphate was investigated. Growth responses to phosphorus were noted from mid-elongation onwards, but the magnitude of response varied between seasons, being greater in the higher rainfall season 1970-71. Maximum yields of grain were 7730 kg ha-1 with 50 kg P ha-1 in 1970-71, and 4440 kg ha-1 with 100 kg P ha-1 in 1971-72, which were increases of 49 and 37 per cent respectively over the appropriate zero phosphorus treatment. These suggested an increased requirement for phosphorus over previous recommendations. Phosphorus reduced the time from emergence to anthesis from 68 to 60 and from 70 to 63 days respectively in the two seasons. About half of the plant phosphorus was taken up after anthesis. It was concluded from soil analysis that phosphate-treated plots had an enhanced supply of phosphorus throughout the period of crop growth. In the second study, four phosphorus sources (superphosphate, triple superphosphate, monoammonium phosphate, and diammonium phosphate) were compared. With 25 kg P ha-1 and with constant nitrogen, grain yield response followed the order superphosphate > monoammonium phosphate > diammonium phosphate > triple superphosphate in both years. Triple superphosphate tended to give lower dry matter yields and nitrogen and phosphorus concentrations than the other three sources.

scholarly journals Yield and Yield Components of Barley (Hordeum vulgare L.) in Relation to Sowing Times

1970 ◽  
Vol 15 ◽  
pp. 139-145 ◽  
Author(s):  
MZ Alam ◽  
SA Haider ◽  
NK Paul
Keyword(s):  
Hordeum Vulgare ◽  
Field Experiment ◽  
Key Words ◽  
Yield Components ◽  
Harvest Index ◽  
Hordeum Vulgare L ◽  
Sowing Time ◽  
Barley Cultivars ◽  
Key Words Barley ◽  
Yield And Yield Components

A field experiment was carried out to study the influence of sowing times on yield and yield components of barley (Hordeum vulgare L.). Seeds of four barley cultivars (BB 1, Karan 19, Karan 163 and Karan 351) were sown with four sowing times (5 November, 17 November, 29 November and 11 December). Most of the yield and yield components were significantly highest in 17 November sowing. Among the cultivars most of the characters showed their highest values in BB 1 and the lowest in Karan 19. Harvest index was found highest in Karan 351 and lowest in BB 1. Key words: Barley, Sowing time, Yield.   doi: 10.3329/jbs.v15i0.2154   J. bio-sci. 15: 139-145, 2007

COMPARISON OF SINGLE LARGE BROADCAST AND SMALL ANNUAL SEED-PLACED PHOSPHORUS TREATMENTS ON YIELD AND PHOSPHORUS AND ZINC CONTENTS OF WHEAT ON CHERNOZEMIC SOILS

1986 ◽  
Vol 66 (2) ◽  
pp. 237-248 ◽  
Author(s):  
B. I. WAGAR ◽  
J. W. B. STEWART ◽  
J. L. HENRY
Keyword(s):  
Key Words ◽  
Zinc Concentration ◽  
Clay Soil ◽  
P Uptake ◽  
Average Yield ◽  
Residual P ◽  
Broadcast Application

Yield and P and Zn contents of wheat from plots on a Dark Brown Chernozemic clay soil which received single broadcast P applications and annual seed-placed P applications were compared in a 6-yr study. Broadcast P applications of 20, 40, 80 and 160 kg P ha−1 increased the average yield by 9, 24, 33 and 35%, respectively. Yearly seed-placed P treatments of 2.5, 5, 10 and 20 kg P ha−1 applied over the first 5 yr of the study increased the average yield by 10, 15, 24 and 29%, respectively. The broadcast application of 40 kg P ha−1 increased yields over 5 yr and had an average yield and P uptake similar to that of the annual seed-placed applications of 10 and 20 kg P ha−1. Broadcasting 80 and 160 kg P ha−1 increased yields over 6 yr. Soil levels of extractable NaHCO3-Pi indicated future increases may occur. Yields from plots receiving consecutive seed-placed P treatments significantly benefited from the P residues of previous seed-placed applications. Plant zinc concentration was significantly reduced by the broadcast application of 160 kg P ha−1 and the seed-placed application of 20 kg P ha−1. Key words: Broadcast P, seed-placed P, residual P, P-Zn interaction

In situ degradabilities of barley grain cultivars

1995 ◽  
Vol 75 (3) ◽  
pp. 485-487 ◽  
Author(s):  
K. B. Lehman ◽  
E. K. Okine ◽  
G. W. Mathison ◽  
J. Helm
Keyword(s):  
Key Words ◽  
Dry Matter ◽  
Barley Grain ◽  
Barley Cultivars ◽  
Key Words Barley

Differences in in situ dry matter degradabilities occurred at all incubation times when 22 cultivars of barley gram grown at three locations were examined. Rapidly and slowly degradable fractions ranged from 25 to 40% and from 49 to 65%, respectively. Rates of degradation ranged from 23 to 35% h−1 (P = 0.03). Key words: Barley, cultivars, in situ, degradability, location

Use of triticale silage in diets for growing steers

1992 ◽  
Vol 72 (1) ◽  
pp. 181-184 ◽  
Author(s):  
D. R. ZoBell ◽  
L. A. Goonewardene ◽  
D. F. Engstrom
Keyword(s):  
Key Words ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Barley Grain ◽  
Dry Matter Intake ◽  
High Moisture ◽  
Key Words Barley ◽  
Barley Silage ◽  
Daily Gain

A total of 120 steers were fed either barley silage (BS) or triticale silage (TS) combined with barley (B) or high-moisture barley (HMB) grain, as a total mixed ration in a 2 × 2 factorial design with three replications. The barley and triticale yields were 9.8 and 8.7 t ha−1, respectively. No differences (P > 0.05) in weight, average daily gain, dry matter intake or feed efficiency were observed for treatments or interactions. TS can be used to replace BS at moderate levels in growing steer rations containing barley grain. Key words: Barley, triticale, silage, steers, performance

Sign in / Sign up

Export Citation Format

Share Document