EFFECT OF LIMING ON THE YIELD, NUTRITION AND COPPER STATUS OF POTATOES, CARROTS AND ONIONS GROWN SEQUENTIALLY IN TWO PEAT SOILS

1983 ◽  
Vol 63 (2) ◽  
pp. 229-244 ◽  
Author(s):  
S. P. MATHUR ◽  
M. P. LEVESQUE
Keyword(s):  
Key Words ◽  
Soil Ph ◽  
Harvest Index ◽  
Dry Matter ◽  
Potato Tubers ◽  
Peat Soils ◽  
Greenhouse Study ◽  
Copper Status ◽  
High Soil ◽  
And Copper Status

In a greenhouse study, two Mesisols, a woody and a sedge peat, were enriched with calcitic agricultural limestone at rates of 0.5–30 t/ha to increase their pH from 3.0 to 5.8. The general fertilization included 50 ppm (20 kg/ha) of Cu (wt/wt). Maximum yields of potatoes were obtained at a soil pH of 3.4–3.6 (4–6 t lime/ha rate) but harvest index of potato tubers (mass of tubers as percent of total dry matter produced) indicated that the 10-t/ha rate would be more suitable. The Cu concentration of potato leaves and tubers did not exceed 16 ppm, and was thus less than phytotoxic level (20 or 30 ppm), even at soil pH lower than 3.4. After further addition of other fertilizers and 25 ppm of Cu, carrots gave maximum yields at the 30-t/ha rate. Copper concentrations in carrot tops and roots were below 16 ppm even at the 10-t-lime/ha rate (soil pH 3.8 or 4.0). Onions, grown after repetition of the fertilization for carrots, gave highest yield, particularly of bulbs, at the 30-t-lime/ha rate but this corresponded to an undesirably high soil pH of 5.7 or 5.8. The Cu concentration in bulbs exceeded 16 ppm only when yields were unacceptably low at the 6-t/ha and lower rates of liming. In all crops, Cu concentrations generally decreased sharply as soil pH rose above 4.0. The Ca:Mg ratio in plants usually increased with liming but, within the range observed here, did not closely parallel increases in yield. Plant concentrations of N, P and K generally decreased with liming at the highest rates (20 or 30 t/ha). Key words: Liming, peat, potatoes, onions, carrots, copper

Soil pH and Cation Exchange Capacity Affects Sunflower Tolerance to Sulfentrazone

2004 ◽  
Vol 18 (2) ◽  
pp. 243-247 ◽  
Author(s):  
Gregory W. Kerr ◽  
Phillip W. Stahlman ◽  
J. Anita Dille
Keyword(s):  
Cation Exchange ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Dry Matter ◽  
Exchange Capacity ◽  
Treated Soil ◽  
Sunflower Plant ◽  
Greenhouse Study ◽  
Leaf Chlorosis ◽  
Over Time

Effects of soil pH and cation exchange capacity (CEC) on sunflower tolerance to sulfentrazone were investigated in a greenhouse study. Variables were soil pH (7.0, 7.3, 7.5, and 7.8), soil CEC (8.2, 13.7, 18.4, and 23.3 cmol/kg), and sulfentrazone rate (0, 105, 158, and 184 g ai/ha). Sulfentrazone-induced leaf chlorosis was affected by soil pH at 12 d after planting (DAP), but plants recovered, and earlier differences were not visible 9 d later. At 12 DAP, leaf chlorosis was 3 or 4% more severe in soils with pH 7.3 or higher compared with soils with pH 7.0 when averaged over both sulfentrazone rate and soil CEC. Leaf chlorosis resulting from sulfentrazone rates of 105, 158, and 184 g/ha was 17, 25, and 35% less at 23 cmol/kg than at 8.2 cmol/kg, respectively. Differences in chlorosis among sulfentrazone rates were greatest in soil with low CEC and lessened as soil CEC increased. Plants regained normal color over time, and newly emerging leaves were not affected. However, plant dry weights were reduced when sulfentrazone rate was ≥158 g/ha. Averaged over sulfentrazone rate and soil pH, sunflower dry weights were less when soil CEC was 8.2 compared with a CEC of 13.7 cmol/kg or higher, indicating a greater response at low CEC. Sunflower plant dry matter was not different in sulfentrazone-treated soil with a CEC above 13.7 cmol/kg. At the ranges tested, soil CEC had a considerably greater effect than did pH on sunflower tolerance to sulfentrazone.

EFFECT OF LIMING ON YIELD AND NUTRIENT CONCENTRATION OF REED CANARYGRASS GROWN IN TWO PEAT SOILS

1983 ◽  
Vol 63 (3) ◽  
pp. 469-478 ◽  
Author(s):  
M. P. LEVESQUE ◽  
S. P. MATHUR
Keyword(s):  
Adverse Effects ◽  
Key Words ◽  
Soil Ph ◽  
Plant Nutrition ◽  
Nutrient Concentration ◽  
Phalaris Arundinacea ◽  
Forage Crops ◽  
Reed Canarygrass ◽  
Peat Soils

A Typic Mesisol (woody peat) and a Humic Mesisol (sedge peat), from Ormstown and Farnham bogs (Que.), respectively, were mixed with calcitic agricultural limestone at rates of 0.5–30 tonne/ha to find a suitable liming rate for growing reed canarygrass on peat soils. Liming increased soil pH from 3.0 to 5.8. Average yields (eight cuttings) of reed canarygrass (Phalaris arundinacea L.) were not increased by liming beyond 6 tonne/ha (pH 3.6). At low lime rates, Cu concentration in the grass was higher in the seventh and eighth cuts while at high liming rates the Mg and P concentrations declined as Ca absorption increased. Considering that pH of the treated peats declined in the year following liming, one-time application of 10 tonne of lime per hectare was judged to be optimal for sustaining yields while providing balanced plant nutrition in the forage crops. It was also concluded that 100 ppm of Cu, both as a fertilizer and mitigator of subsidence, could be added to these soils at a stabilized pH of 3.4 to 3.6 without adverse effects on plant nutrition. At lower pH, the Cu concentration of the crop was found to increase from an optimal 10 ppm to 17 ppm. Key words: Liming, peat soils, nutrient concentration, reed canarygrass

A SURVEY OF MATERNAL COPPER STATUS AND FETAL TISSUE COPPER CONCENTRATIONS IN SASKATCHEWAN BOVINE

1989 ◽  
Vol 69 (1) ◽  
pp. 141-150 ◽  
Author(s):  
S. R. GOONERATNE ◽  
D. A. CHRISTENSEN
Keyword(s):  
Key Words ◽  
Dry Matter ◽  
Copper Deficiency ◽  
Fetal Liver ◽  
Fetal Tissue ◽  
Fetal Kidney ◽  
Copper Status ◽  
Maternal Liver ◽  
Northern Regions ◽  
Cu Nutrition

Copper (Cu) status of cattle raised in different soil zones of Saskatchewan was examined with emphasis on the relation between liver Cu concentration in pregnant cows, stage of pregnancy and fetal liver Cu status. Whole fetuses and livers from adult animals were obtained during routine slaughter operation at a local packing plant. Twenty percent of steers, 54% of pregnant cows, 52% of heifers and 77% of nonpregnant cows had liver Cu levels less than 25 mg kg−1 dry matter (DM). Hypocuprosis was most marked in cattle originating from northern regions of Saskatchewan. Fetal liver Cu concentration depended on the dam liver Cu concentration and on stage of pregnancy and could be represented as: Fetal liver Cu concentration (mg kg−1 DM) = 217.5 + 0.023 [(age of fetus (days) × dam liver Cu concentraiton (mg kg−1 DM)]. During gestation the level of Cu progressively increased in the fetal liver and decreased in maternal liver. Liver Cu levels of fetuses from dams with liver Cu greater than 25 mg kg−1 DM were higher (P < 0.05) than those in fetuses from dams with liver Cu levels lower than 25 mg kg−1 DM. Dam liver Cu status did not influence fetal liver, kidney, heart and brain weights or the Cu concentration of fetal kidney, heart or brain. The magnitude of hypocuprosis in cattle in Saskatchewan is extensive and emphasizes the importance of adequate Cu nutrition in pregnant cattle with respect to maintaining acceptable fetal Cu status. Key words: Copper deficiency, Saskatchewan, soil zones, cattle, pregnancy, fetus

scholarly journals Perennial lupin establishment and yield when sown at five different rates at Glenmore Station, Lake Tekapo.

2014 ◽  
Vol 76 ◽  
pp. 53-60
Author(s):  
D.J. Moot ◽  
K.M. Pollock
Keyword(s):  
Key Words ◽  
Soil Ph ◽  
Dry Matter ◽  
Research Programme ◽  
Kentucky Bluegrass ◽  
Growth Season ◽  
Lupinus Perennis ◽  
The Subject ◽  
Direct Drilling ◽  
Spring Yield

Abstract The potential for perennial lupins to underpin grass/ legume pastures was the subject of a research programme for merino farmers in areas where more conventional legumes struggle to thrive. A previously uncultivated pasture on an acidic soil, (pH 5.0; Al = 5 mg/kg), and dominated by browntop, sweet vernal and Kentucky bluegrass, was sprayed with herbicide, burnt and top-dressed with 3 t/ha lime on half the area in the autumn prior to direct drilling on 12 Dec 2012. A blue perennial lupin and a multi-coloured (Russell) lupin were sown at 2, 4, 8, 12, 16 and 32 kg/ha and cocksfoot at 2 kg/ha. Yield at four months after sowing had increased with the lupin sowing rate; up to 5.5 t dry matter (DM)/ha at 32 kg seed/ha. The annual yield for the following growth season was greater than 10 t DM/ ha with little response above 8 kg lupin seed/ha. There was a small but inconsistent response to the lime by the Russell lupin. Overall, lupin contributed 79% of annual yield and >90% of the spring yield at sowing rates >8 kg/ha. The sown cocksfoot and resident grasses showed a positive lime response at the lower lupin sowing rates. Key words: Lupinus perennis, L. polyphyllus

Dry Matter Production and Rate of Change of Harvest Index at High Temperature in Peanut

Crop Science ◽  
2002 ◽  
Vol 42 (1) ◽  
pp. 146 ◽  
Author(s):  
P. Q. Craufurd ◽  
P. V. Vara Prasad ◽  
R. J. Summerfield
Keyword(s):  
High Temperature ◽  
Harvest Index ◽  
Dry Matter ◽  
Rate Of Change ◽  
Dry Matter Production ◽  
Matter Production

HIGH MOISTURE GROUND EAR CORN, HIGH MOISTURE BARLEY OR SODIUM HYDROXIDE TREATED BARLEY FOR LACTATING COWS: MILK PRODUCTION AND RATION UTILIZATION

1983 ◽  
Vol 63 (1) ◽  
pp. 155-162 ◽  
Author(s):  
L. KUNG Jr. ◽  
B. W. JESSE ◽  
J. W. THOMAS ◽  
J. T. HUBER ◽  
R. S. EMERY
Keyword(s):  
Sodium Hydroxide ◽  
Key Words ◽  
Milk Production ◽  
Dry Matter ◽  
Milk Composition ◽  
Dry Matter Intake ◽  
High Moisture ◽  
Acid Detergent Fiber ◽  
Lactating Cows ◽  
Fecal Ph

Whole barley was treated with sodium hydroxide (NaOH) in laboratory trials. Dry matter disappearance from nylon bags in the rumen of whole barley treated with 2.5, 3.5, or 4.9% NaOH for 30 h was 59.6, 72.4, and 93.0%, respectively, compared with 82.2% for untreated ground barley. In a subsequent lactation trial, 24 Holstein cows (eight per treatment) were fed high moisture ground ear corn, high moisture rolled barley or high moisture whole barley treated with 3.5% NaOH. Milk persistencies tended to be greater for cows fed high moisture rolled barley, next for ground ear corn and least for NaOH-treated barley. Milk composition was similar for all treatments. Dry matter intake was greatest for cows fed ground ear corn and lower for those fed the barley diets. Alpha-linked glucose and pH of feces were similar for cows fed ground ear corn and high moisture rolled barley diets, but fecal pH was lower and alpha-linked glucose concentrations three times greater for NaOH-treated barley. Digestibility percents of dry matter, acid detergent fiber and nitrogen were 61.4, 25.3, 64.7 for ground ear corn; 64.4, 38.0, 67.1 for high moisture rolled barley; and 56.8, 43.2, 54.8 for NaOH-treated barley, respectively. Rumen grain turnover estimated by excretion of ytterbium in feces was greatest for NaOH-treated barley (9.09%/h), intermediate for ground ear corn (6.10%/h) and lowest for high moisture rolled barley (4.93%/h). Key words: Dairy, sodium hydroxide, high moisture grains

Soil acidity in 1970 and 1989 in a coniferous forest in southwest Finland

1998 ◽  
Vol 78 (3) ◽  
pp. 477-479 ◽  
Author(s):  
C. J. Westman ◽  
S. Jauhiainen
Keyword(s):  
Key Words ◽  
Soil Ph ◽  
Soil Acidity ◽  
Mineral Soil ◽  
Coniferous Forest ◽  
Soil Layers ◽  
Water Suspension ◽  
Ph Values ◽  
Humus Layer ◽  
Repeated Sampling

Forest soil pH in southwest Finland was measured with identical sampling and analysing methods in 1970 and 1989. The acidity of the organic humus layer increased significantly as pH values measured on water and on salt suspensions decreased between the two sampling dates. For the mineral soil layers, no unambiguous trend was found. pH values measured on salt suspension tended to be unchanged or lower, while pH on water suspension in some soil layers were even higher in 1989 than in 1970. Key words: pH, repeated sampling

Effect of varying seeding rates on hybrid and conventional summer rape performance in Manitoba

1992 ◽  
Vol 72 (3) ◽  
pp. 635-641 ◽  
Author(s):  
A. E. Van Deynze ◽  
P. B. E. McVetty ◽  
R. Scarth ◽  
S. R. Rimmer
Keyword(s):  
Protein Content ◽  
Chlorophyll Content ◽  
Seed Yield ◽  
Harvest Index ◽  
Dry Matter ◽  
Oil Content ◽  
Seed Quality ◽  
Seeding Rate ◽  
Seed Formation ◽  
Matter Production

To compare the effects of varying seeding rate on the agronomic performance, phenology and seed quality of hybrid and conventional summer rape cultivars, four hybrid and two conventional summer rape cultivars were seeded at 1.5, 3.0, 4.5, 6.0 and 9.0 kg ha−1 at two locations for 3 yr. The hybrid cultivars were, very importantly, 24% higher yielding and produced 50% more total dry matter than the conventional cultivars. The hybrid cultivars were, on average, 1.3% lower in seed oil content, 1.0% higher in seed protein content and equal in sum of oil and protein in the seed compared with the conventional cultivars. The hybrid cultivars were on average, 1.3 d later to 50% flowering and 1.1 d later to maturity than the average for the conventional cultivars, (i.e., equal or earlier to flowering and maturity than Regent). The hybrid cultivars were also 3.9% lower in harvest index and 1.3 ppm lower in chlorophyll content than the conventional cultivars. In spite of these differences, there were no significant cultivar-by-seeding-rate interactions, indicating that the hybrid and conventional cultivars responded similarly to varying seeding rate. Lodging, days to 50% flowering, days to maturity, harvest index, survival, oil content and protein content displayed significant linear responses to varying seeding rate. Stand at maturity, seed yield and total dry matter production displayed significant linear and quadratic responses to varying seeding rate. Varying seeding rate had no effect on seed formation period, the sum of oil and protein content, or chlorophyll content. A seeding rate of 6 kg ha−1 maximized seed yield for both hybrid and conventional summer rape cultivars.Key words: Brassica napus, canola, seed quality, agronomy, phenology

EVALUATION OF TIMOTHY CULTIVARS FOR VOLUNTARY INTAKE AND NUTRIENT COMPONENTS

1988 ◽  
Vol 68 (4) ◽  
pp. 1121-1129 ◽  
Author(s):  
W. N. MASON ◽  
P. M. FLIPOT
Keyword(s):  
Key Words ◽  
Dry Matter ◽  
Phleum Pratense ◽  
Dry Matter Intake ◽  
Dry Matter Yield ◽  
Dry Matter Digestibility ◽  
Flower Stage ◽  
Voluntary Intake ◽  
Phleum Pratense L

Five timothy (Phleum pratense L.) cultivars, Clair, Champ, Milton, Climax and Bounty, were harvested at first flower stage during 2 consecutive years and in the regrowth for 1 yr. The forages were each offered as hay to 15 young rams to evaluate voluntary intake. Five animals were used to determine initial harvest dry matter digestibility. The cultivars varied significantly in voluntary intake at first flower stage. The highest intake (g kg−0.75 d−1) averaged for the years was obtained in the early cultivar Champ (65.9), which was 10% more than that of the medium-late cultivar Climax. The cultivars did not differ significantly in dry matter digestibility. In the regrowth, the relative intakes of the cultivars were essentially reversed from that of the initial harvest. The voluntary intake was substantially higher but the differences among forages were less marked. Climax regrowth voluntary intake was higher (P < 0.05) than all cultivars, except Bounty. A 15% range in digestible dry matter intake was present among cultivars. The ranking of the culivars for digestible dry matter was different than for dry matter yield. Key words: Timothy, Phleum pratense L., voluntary intake, dry matter digestibility

Effects of Different Copper Sources and Levels on Plasma Superoxide Dismutase, Lipid Peroxidation, and Copper Status of Lambs

2011 ◽  
Vol 144 (1-3) ◽  
pp. 570-579 ◽  
Author(s):  
Jianbo Cheng ◽  
Hui Ma ◽  
Caiyun Fan ◽  
Zijun Zhang ◽  
Zhihai Jia ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Superoxide Dismutase ◽  
Copper Status ◽  
And Copper Status
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