INCREASE IN YIELD AND PROTEIN CONTENT OF NATIVE BLUEBUNCH WHEATGRASS FROM NITROGEN FERTILIZATION

1959 ◽  
Vol 39 (4) ◽  
pp. 501-504 ◽  
Author(s):  
J. L. Mason ◽  
J. E. Miltimore
Keyword(s):  
Ammonium Nitrate ◽  
Protein Content ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Protein Production ◽  
Ground Cover ◽  
Poa Secunda ◽  
Acre Yield ◽  
Bluebunch Wheatgrass ◽  
Agropyron Spicatum

A native, bluebunch wheatgrass stand on a Brown soil in the South Okanagan district of British Columbia with a mean precipitation of 11 inches has shown striking response to nitrogen fertilization. With applications of ammonium nitrate broadcast annually at rates of 0 to 60 lb. of actual nitrogen per acre, yield was increased from 640 to 1060 lb. of dry matter in 1957 and from 678 to 1725 lb in 1958. Protein content increased from 3.9 to 6.2 per cent and protein production per acre from 27 to 107 lb. Ground cover of Agropyron spicatum increased from 4.6 to 6.8 per cent, of Poa secunda from 2.0 to 2.7 per cent. The number of culms of Agropyron spicatum per hundred-point sample increased from 9.8 to 188.2.

EFFET DE L’APPLICATION D’AZOTE ET DU STADE DE CROISSANCE A LA RECOLTE SUR LA PERFORMANCE DE LA FLEOLE DES PRES (PHLEUM PRATENSE)

1977 ◽  
Vol 57 (3) ◽  
pp. 955-962 ◽  
Author(s):  
J. C. ST-PIERRE ◽  
G. PELLETIER
Keyword(s):  
Protein Content ◽  
Nitrogen Fertilization ◽  
Crude Protein ◽  
Dry Matter ◽  
Phleum Pratense ◽  
Dry Matter Yield ◽  
Stages Of Growth ◽  
Dry Matter Digestibility ◽  
Set Up ◽  
Phleum Pratense L

An experiment was set up to determine the effect of time and rate of nitrogen fertilization and stage of growth at first cut on yield and digestibility of dry matter and protein content of two timothy (Phleum pratense L.) cultivars, at each of two cuts, No difference in yield or chemical composition was found between cultivars. Highest yields and crude protein contents were measured at rates of nitrogen fertilizer of 112 and 224 kg/ha. Higher yield and protein content were obtained with NH4NO3 applied totally or in split applications in the spring than with urea in the fall. Dry matter digestibility (DDM) was not affected by nitrogen at rates of 56, 112 and 224 kg/ha. First cut was taken at two different stages of growth, and the second cut was taken on the same day in all the plots. At anthesis, yields were higher than at the head stage but DDM and protein content were lower. The opposite was found at the second cut. Except in 1973, total dry matter yield was not affected by the stage of growth at first cut.

scholarly journals Effects of Nitrogen Fertilization and Frequency of Cutting on the Yield and Composition of Pangola Grass in Puerto Rico

1969 ◽  
Vol 45 (1) ◽  
pp. 37-45
Author(s):  
José Vicente-Chandler ◽  
Jacinto Figarella ◽  
Servando Silva
Keyword(s):  
Puerto Rico ◽  
Protein Content ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Slow Growth ◽  
Lignin Content ◽  
Optimum Combination ◽  
Fertilizer Nitrogen ◽  
Harvest Intervals ◽  
Nitrogen Rates

The effects of nitrogen rates ranging from 0 to 1,600 pounds of N per acre yearly and of 30-, 45-, and 60-day harvest intervals on the yield and composition of Pangola grass were determined for 2 consecutive years. Yields increased sharply with nitrogen fertilization up to the 400-pound level, while protein content increased up to the 1,600-pound level. About two-thirds of the fertilizer nitrogen was recovered in the forage when 400 pounds or less were applied per acre yearly. Efficiency of utilization, in terms of dry matter produced per pound of nitrogen, decreased with increasing rates. Yields and lignin content of the forage increased while the protein content decreased with length of harvest interval. A 45-day harvest interval during seasons of flush growth, and a 60-day interval during the season of slow growth, combined with 400 pounds of nitrogen per acre yearly seems to be the optimum combination. Yields varied widely with season of the year.

scholarly journals Effects of Nitrogen Fertilization and Frequency of Cutting on the Yield and Composition of Para Grass in Puerto Rico

1969 ◽  
Vol 43 (4) ◽  
pp. 240-248
Author(s):  
José Vicente-Chandler ◽  
Servando Silva ◽  
Jacinto Figarella
Keyword(s):  
Protein Content ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Phosphorus Content ◽  
Lignin Content ◽  
Harvest Intervals ◽  
Percent Protein ◽  
Calcium Magnesium ◽  
Nitrogen Rates ◽  
Forage Yields

The effects of rates ranging from 0 to 1,600 pounds of nitrogen per acre yearly and of 40-, 60-, and 90-day harvest intervals on the yield and composition of Para grass were determined over a 1 year period. Yields increased with nitrogen fertilization up to the 800-pound level, while protein content and protein yields increased up to the 1,600-pound level. About half of the fertilizer nitrogen was recovered in the forage when 800 pounds or less were applied per acre. Efficiency of utilization in terms of dry matter produced per pound of nitrogen, decreased rapidly with increasing rates. The phosphorus content of the forage decreased while the lignin content increased with nitrogen rates. Nitrogen fertilization had no pronounced effect on the calcium, potassium, or magnesium contents of the forage. Yields and lignin content of the forage increased while protein, phosphorus, calcium, magnesium, and potassium contents decreased with length of harvest interval. There are marked seasonal variations in yield due primarily to rainfall. With a 60-day harvest interval and 800 pounds of nitrogen per acre yearly, Para grass yielded 30,841 pounds of dry forage, or about 70 tons of green forage, with a 9.5-percent protein content. With this treatment Para grass removed 52.4 pounds of P, 120 of Ca, 524 of K, 77 of Mg, and 469 pounds of N per acre yearly. It is not advisable to use rates of more than 400 pounds of nitrogen per acre per year during dry weather.

EFFECTS OF HARVEST SCHEDULES AND NITROGEN FERTILIZATION ON YIELDS, QUALITY, AND GROUND COVER OF BROMEGRASS

1979 ◽  
Vol 59 (1) ◽  
pp. 257-259
Author(s):  
H. T. KUNELIUS
Keyword(s):  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Ground Cover ◽  
Bromus Inermis ◽  
Considerable Reduction ◽  
Total N

Dry matter (DM) and in vitro digestible DM (IVDDM) yields of bromegrass (Bromus inermis Leyss.) were greater for schedule with harvest at full heading whereas percentage total N and percentage IVDDM were greater for heads emerging schedule. Applied N increased DM production from 26.2 to 4.3 kg DM/kg N. Total N concentrations of tissue and N yields had linear responses to applied N. There was a considerable reduction in the ground cover by bromegrass that was not influenced by rates of N or harvest schedule.

Yield, nutritive value and ensiling characteristics of whole-crop spring cereals

1971 ◽  
Vol 76 (3) ◽  
pp. 479-485 ◽  
Author(s):  
D. A. Lawes ◽  
D. I. H. Jones
Keyword(s):  
Protein Content ◽  
Nitrogen Fertilization ◽  
Crude Protein ◽  
Dry Matter ◽  
Nutritive Value ◽  
Maximum Yield ◽  
Crude Protein Content ◽  
Spring Cereals ◽  
Cereal Yields

SUMMARYThe dry-matter yield, in vitro digestibility and crude protein content of four varieties of spring cereals (one barley, one wheat and two oats) were examined at weekly intervals at two levels of nitrogen fertilization during two successive years. The ensiling characteristics of crops cut at two dates were also determined. Dry-matter yields increased until the end of July. Digestibility and crude protein content declined until mid July when values of 56–60 and 6–7% for the barley and wheat, and 53–55 and 5–6% for the oats respectively were maintained. Crops of all varieties were suitable for ensiling at maximum yield.Other experiments investigating level of whole-crop cereal yields obtainable with higher levels of fertility produced yields of over 16 metric tons D.M./ha with applications of 200–250 kg N, P2 O5 and K2O per hectare.

Effect of harvesting stage on cereal and legume forage production in low rainfall regions

1976 ◽  
Vol 86 (1) ◽  
pp. 155-161 ◽  
Author(s):  
A. Hadjichristodoulou
Keyword(s):  
Chemical Composition ◽  
Protein Content ◽  
Dry Matter ◽  
Moisture Stress ◽  
N Fertilization ◽  
Forage Production ◽  
Common Vetch ◽  
Three Stages ◽  
Harvesting Stage ◽  
Percentage Protein

SUMMARYThe effect of stage of harvesting on dry-matter (D.M.) yield and chemical composition of barley, wheat and the legumes common vetch (F. sativa), woollypod vetch (F. dasycarpa) and fodder peas (P. sativum) were studied in Cyprus under low rainfall conditions in a series of trials sown in four successive years. Cereals were harvested at the beginning of heading, 50% heading and the milk stage of grain, and legumes at three stages from preflowering to full pod formation, D.M., protein and digestible D.M. yields and percentage D.M. content increased with age, whereas percentage protein content and D.M. digestibility declined. Under moisture stress conditions before and during the harvesting period D.M. yields did not increase significantly with age. Protein content of cereals under low rainfall conditions was higher than that of cereals grown in the U.K. under higher N fertilization levels. Rainfall conditions affected drastically the performance of both cereals and legumes. However, average yields were satisfactory; the barley variety 628 gave 8·98 t/ha, the highest D.M. yield among all cereal and legume varieties.

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