EFFECT OF STAGE AND HEIGHT OF CUTTING ON THE DRY MATTER YIELD AND PERSISTENCE OF INTERMEDIATE WHEATGRASS, BROMEGRASS, AND REED CANARYGRASS

1969 ◽  
Vol 49 (3) ◽  
pp. 321-332 ◽  
Author(s):  
T. Lawrence ◽  
R. Ashford
Keyword(s):  
Regression Analysis ◽  
Dry Matter ◽  
Statistical Approach ◽  
Bromus Inermis ◽  
Dry Matter Yield ◽  
Single Test ◽  
Reed Canarygrass ◽  
Intermediate Wheatgrass ◽  
Stage Of Development ◽  
Cutting Height

The effects of harvesting at three heights of cutting and four stages of development on the dry matter yield and persistency of intermediate wheatgrass, Agropyron intermedium (Host.) Beauv., bromegrass, Bromus inermis Leyss., and reed canarygrass, Phalaris arundinacea L., were studied at two sites on irrigated land.The dry matter yield of all species decreased with increasing heights of cutting, and increased with advancing maturity at the time of taking the initial harvest. Highest yields were obtained from all species when cut at a height of 3.8 cm during the seed stage of development. However, this height of cutting resulted in the highest degree of winter injury and the most rapid stand deterioration. Bromegrass was less sensitive to variation in cutting height than intermediate wheatgrass or reed canarygrass. On well-drained, irrigated land, intermediate wheatgrass yielded significantly more forage than either bromegrass or reed canarygrass.The application of a regression analysis to the study of significant interactions among management factors and species within a single test proved to be a very useful statistical approach.

EFFECT OF NITROGEN FERTILIZER AND CLIPPING FREQUENCY ON THE DRY MATTER YIELD AND PERSISTENCY OF INTERMEDIATE WHEATGRASS

1969 ◽  
Vol 49 (4) ◽  
pp. 435-446 ◽  
Author(s):  
T. Lawrence ◽  
R. Ashford
Keyword(s):  
Regression Analysis ◽  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Statistical Approach ◽  
Ground Cover ◽  
N Fertilizer ◽  
Dry Matter Yield ◽  
Intermediate Wheatgrass ◽  
Agropyron Intermedium ◽  
Management Factors

The effects of six rates of N fertilizer and five frequencies of clipping on the dry matter yield and persistency of irrigated intermediate wheatgrass, Agropyron intermedium (Host.) Beauv., were studied during 1961–62 at one site, and 1963–65 at a second site.The dry matter yield increased with increasing rates of N fertilizer, and with longer intervals between clippings. Highest yields were obtained with the 375-kg/ha rate of N fertilizer and the 8-week clipping interval.Fertilizer level did not have a significant effect on either the basal ground cover of grass or the degree of winter injury suffered by intermediate wheat-grass. However, clipping frequency was closely related to both of these factors.Application of a regression analysis to the study of significant interactions among management factors proved to be a very useful statistical approach.

RESPONSE OF SIX-YEAR-OLD GRASS–ALFALFA PASTURES TO NITROGEN FERTILIZER IN NORTHEASTERN SASKATCHEWAN

1968 ◽  
Vol 48 (2) ◽  
pp. 167-173 ◽  
Author(s):  
D. A. Cooke ◽  
S. E. Beacom ◽  
W. K. Dawley
Keyword(s):  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Linear Increase ◽  
Bromus Inermis ◽  
Dry Matter Yield ◽  
Stocking Rate ◽  
Intermediate Wheatgrass ◽  
Nitrogen Requirement ◽  
Medicago Sativa L ◽  
N Treatment

Two 6-year-old grass–alfalfa mixtures were compared when fertilized with 0, 84 and 168 kg nitrogen per hectare and grazed by yearling Hereford steers. The effect of stocking rate, fertilization, forage mixture and year on the cumulative liveweight gain per hectare was also determined. The bromegrass (Bromus inermis L.) and alfalfa (Medicago sativa L.) mixture showed a linear increase in dry matter yield, but the nitrogen requirement of the intermediate wheatgrass (Agropyron intermedium L.) and alfalfa mixture was fully met by the 84-kg/ha N treatment. In 1960, the addition of 84 and 168 kg/ha N to the bromegrass–alfalfa increased animal production by 61 and 98% respectively. Corresponding increases of 53 and 56% were obtained from the fertilized intermediate wheatgrass–alfalfa mixture. Similar percentage increases were obtained in 1961. The 84-kg/ha N treatment reduced the alfalfa content of both mixtures by more than 40%. The 168-kg/ha N treatment practically eliminated the alfalfa from the stands. Nitrogen recovery by the bromegrass–alfalfa was similar at both fertility levels and amounted to 62% in 1960, and 24% in 1961. Recovery of nitrogen by intermediate wheatgrass–alfalfa was 62 and 36% from the 84- and 168-kg/ha N treatments in 1960, and 23 and 12% respectively in 1961.

PRODUCTIVITY OF INTERMEDIATE WHEATGRASS AS INFLUENCED BY DATE OF INITIAL CUTTING, HEIGHT OF CUTTING, AND N FERTILIZER

1973 ◽  
Vol 53 (2) ◽  
pp. 295-301 ◽  
Author(s):  
T. LAWRENCE
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Dry Matter ◽  
N Fertilizer ◽  
Protein Yield ◽  
Dry Matter Yield ◽  
Crude Protein Content ◽  
Intermediate Wheatgrass ◽  
Agropyron Intermedium ◽  
Cutting Height

The interactions of three dates of initial cutting followed by one or two subsequent cuttings, three heights of cutting, and four fertilizer treatments on the dry matter yield, crude protein content, and crude protein yield of intermediate wheatgrass (Agropyron intermedium (Host.) Beauv.) were studied on irrigated land for 2 yr. Cutting on 15 June during the shot blade stage resulted in severe summer killing. Variation in height of cutting and N fertilizer levels resulted in differences in annual yields. On the basis of the 2-yr mean yield, however, these differences were masked by interaction of these factors with years. Crude protein content of the forage at cut 1 decreased with the deferment of the first cut, was not influenced by height of cutting, but increased with increases in N fertilizer. The yield of crude protein increased with increasing levels of N fertilizer and showed significant interactions for year × date of initial cutting × fertilizer and years × date of initial cutting × height of cutting. Split applications of N fertilizer showed no advantage over a single spring application in either year.

scholarly journals Dry matter yield of forage corn in the late milk stage of development depending on the planting dates in the steppe zone of the Crimea

2020 ◽  
Author(s):  
A.V. Cherkashyna ◽  
◽  
E.F. Sotchenko ◽  
Keyword(s):  
Dry Matter ◽  
Maximum Yield ◽  
Steppe Zone ◽  
Planting Date ◽  
Severe Drought ◽  
Dry Matter Yield ◽  
Planting Dates ◽  
Stage Of Development ◽  
Moisture Availability ◽  
Sowing Dates

Dry matter yield is an objective indicator of assessing the productivity of corn hybrids grown for silage and green fodder. The aim of the work was to identify optimal planting dates to obtain maximum yield of dry matter at the late milk stage of development for hybrids of corn depending on groups of maturity under rain-fed conditions of the Crimean steppe zone. The sowing dates of the field experiment were on April 5th, 15th, and 25th. We studied hybrids of corn of different groups of maturity. Soil – chernozems southern low-humus. Meteorological conditions in 2016 were characterized by increased moisture availability (Selyaninov Hydrothermal Coefficient (HTC) 1.46). In 2017, severe drought was noted (HTC 0.34). Moisture availability was insufficient in 2018 and 2019 (HTC 0.79 and 0.78, respectively). In 2016-2019, the best planting date for hybrid ‘Nur’ was April 15th; the dry matter yield in the late milk stage was 6.69 t/ha. For the medium- early hybrid ‘Mashuk 220 MV’, the best sowing dates were April 15th and 25th; dry matter yield was 5.95 and 5.78 t/ha, respectively. Hybrid ‘Mashuk 355 MV’ demonstrated higher dry matter yield on April 5th and 15th (7.12 and 6.99 t/ha). However, the planting date of April 25th led to significant yield decreased (to 6.1 t/ha).

PASTURE PRODUCTIVITY OF TWO GRASS–ALFALFA MIXTURES IN NORTHEASTERN SASKATCHEWAN

1965 ◽  
Vol 45 (2) ◽  
pp. 162-168 ◽  
Author(s):  
D. A. Cooke ◽  
S. E. Beacom ◽  
W. K. Dawley
Keyword(s):  
Medicago Sativa ◽  
Dry Matter ◽  
Bromus Inermis ◽  
Beef Production ◽  
Rotational Grazing ◽  
Standard Mixture ◽  
Intermediate Wheatgrass ◽  
Medicago Sativa L ◽  
Annual Application ◽  
Average Yearly Increase

Two grass–alfalfa mixtures were compared for seven consecutive years when continuously and when rotationally grazed by yearling Hereford steers. The productivity of rotationally grazed pastures as affected by annual application of fertilizers was also determined. Intermediate wheatgrass (Agropyron intermedium L.) and alfalfa (Medicago sativa L.) compared favorably with the standard mixture of bromegrass (Bromus inermis L.) and alfalfa for pasture purposes. Production of dry matter ranged from approximately 2.5 to 0.5 tons per acre in the first and seventh year respectively. Precipitation in these two years was 20.7 and 7.7 in. respectively. Rotational grazing did not increase beef production. Fertilization of bromegrass–alfalfa with 20 lb of N per acre and with 20 lb of N + 40 lb of P2O5 per acre resulted in average yearly increase of 18 and 32 lb of beef per acre respectively. Fertilization of intermediate wheatgrass– alfalfa resulted in comparable increase of 1 and 26 lb of beef per acre respectively.

scholarly journals Effects of Cutting Height and Trampling over Stubbles of the First Crop on Dry Matter Yield in Twice Harvesting of Forage Rice

2009 ◽  
Vol 12 (1) ◽  
pp. 124-127 ◽  
Author(s):  
Hiroshi Nakano ◽  
Satoshi Morita ◽  
Hisashi Kitagawa ◽  
Motoki Takahashi
Keyword(s):  
Dry Matter ◽  
Dry Matter Yield ◽  
Forage Rice ◽  
Cutting Height

THE PRODUCTIVITY OF INTERMEDIATE WHEATGRASS AS AFFECTED BY INITIAL HARVEST DATES AND RECOVERY PERIODS

1966 ◽  
Vol 46 (1) ◽  
pp. 9-15 ◽  
Author(s):  
T. Lawrence ◽  
R. Ashford
Keyword(s):  
Dry Matter ◽  
Recovery Period ◽  
Harvest Date ◽  
Dry Matter Yield ◽  
Intermediate Wheatgrass ◽  
Agropyron Intermedium ◽  
Harvest Dates ◽  
Critical Phase

The productivity of Agropyron intermedium (Host.) Beauv., as influenced by variation in the date of initial harvest and length of recovery period between cuttings, was studied on irrigated land over a 2-year period. Ten initial cutting dates, each spaced 3 days apart, and two recovery periods of 21 days and 42 days, were used. Delaying the initial harvest date resulted in progressively greater dry-matter yields at the first cutting and progressively lower yields at the second cutting. Earlier and later initial cuttings gave higher yields than at the shotblade stage when this species seems to be in a critical phase of development. Grass given a 42-day recovery period between cuttings produced an average dry-matter yield of 3.63 tons per acre over the 2-year period, and 1.71 tons of root material per acre in the first crop year. Comparable yields in tons per acre for grass given a 21-day recovery period were 2.29 for dry matter and 1.31 for root material. Likewise, grass given a 21-day recovery period showed a rapid stand deterioration, whereas that given a 42-day recovery period did not show a reduction. Intermediate wheatgrass is high-yielding if managed properly and not abused by intensive cutting or grazing. It appears to be more suitable for hay production than for pasture.

scholarly journals Effects of seeding density, cutting height and month of harvest on the dry matter yield and protein content of Ubon Stylo

1969 ◽  
Vol 99 (2) ◽  
pp. 147-156
Author(s):  
Jorge Olivares ◽  
Elide Valencia ◽  
Rafael Ramos-Santana
Keyword(s):  
Dry Matter ◽  
The Other ◽  
Seeding Density ◽  
Second Phase ◽  
Dry Matter Yield ◽  
Seeding Rate ◽  
Four Levels ◽  
Time Of Year ◽  
High Yields ◽  
Cutting Height

Four levels of seed were used for establishment of Ubon Stylo (Stylosanthes guianensis var. vulgaris x var. pauciflora) in the first phase of this research, and in the present second phase, this same variable plus three cutting heights and four months of harvest at 90-d intervals were evaluated as to their effects on forage dry matter yield (DMY) and crude protein (CP) content. The seeding levels (5, 10, 15 and 20 kg/ha) constitute the main plots; cutting heights (10, 15 and 20 cm) formed the subplots; and months of harvest (March, June, September and December) the sub-subplots. Statistical analysis revealed that DMY was not significantly influenced by cutting height or by the interactions of this variable with each of the other two. Month of harvest did exert a significant effect (P<0.05) on DMY, and seeding density showed a similar tendency (P<0.063); also an interaction (P<0.05) between these two variables was detected. Mean DMY, expressed as annual equivalent (kg/ha), corresponding to the four consecutive harvests from March to December were: 5,949; 11,285; 8,105 and 6,543; with a general mean of 7,970. Values of DMY corresponding to the four progressive seeding rates from 5 to 20 kg/ha seed were: 7,488; 8,347; 8,375 and 7,672 kg/ha. The seeding rate x harvest interaction is illustrated by the fact that the highest DMY at the June harvest (13,975 kg/ha) was obtained with 15 kg/ha seed, whereas the maximum DMY at the other three harvests corresponded to the 10 kg/ha seeding rate. The general mean of the forage CP content was 13.4% and no significant effects were exerted by the three factors under study or their interactions. The present results confirm the earlier conclusion that 10 kg/ha is the optimum seeding rate for establishment of Ubon Stylo to promote a high DMY without incurring in unnecessary additional expense. Furthermore, the high yields obtained in the summer season suggest that the cutting interval could be shortened to improve the CP content at this time of year.

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