scholarly journals Effects of Planting Time and Nitrogen Application on Dry Matter Yield of the Forage Rice Cultivar Tachiaoba in Southwestern Japan

2009 ◽  
Vol 12 (3) ◽  
pp. 351-358 ◽  
Author(s):  
Hiroshi Nakano ◽  
Satoshi Morita
Keyword(s):  
Dry Matter ◽  
Rice Cultivar ◽  
Dry Matter Yield ◽  
Nitrogen Application ◽  
Planting Time ◽  
Forage Rice

The effects of frequency of defoliation on the yield response of a perennial ryegrass sward to a wide range of nitrogen application rates

1978 ◽  
Vol 90 (3) ◽  
pp. 447-457 ◽  
Author(s):  
D. Reid
Keyword(s):  
Perennial Ryegrass ◽  
Dry Matter ◽  
Total Yield ◽  
Response Surfaces ◽  
Yield Response ◽  
Dry Matter Yield ◽  
Nitrogen Application ◽  
Nitrogen Rate ◽  
Wide Range ◽  
Cutting Frequency

SummaryIn a 3-year experiment on a sward of S. 23 perennial ryegrass 21 rates of nitrogen fertilizer ranging from 0 to 897 kg/ha were applied annually on plots cut three, five or ten times per year. The cutting dates within each frequency were decided on the basis of herbage growth stage. Four-parameter exponential curves fitted to the herbage yield data show that the pattern of response to nitrogen application in the five cuts per year treatment was markedly similar to that reported for a previous experiment (Reid, 1970). Alterations in the cutting frequency affected the pattern of dry-matter yield response to nitrogen, but not that of crude-protein yield response. The combined effects of cutting frequency and nitrogen rate are illustrated by response surfaces fitted to the dry-matter yield results using an extension of the equation for the curves fitted to the individual frequency results. These surfaces show that as the number of cuts per year was increased the total yield and the response to nitrogen decreased, but the response was maintained to an increasingly high nitrogen rate. The practical implications of the results are discussed in relation to intensive grazing managements for dairy cows.

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

Effect of nitrogen fertiliser application and length of lock up on dairy pasture dry matter yield and quality for silage in south-western Victoria

1998 ◽  
Vol 38 (3) ◽  
pp. 219 ◽  
Author(s):  
J. L. Jacobs ◽  
F. R. McKenzie ◽  
S. E. Rigby ◽  
G. Kearney
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Linear Increase ◽  
Water Soluble ◽  
Dry Matter Yield ◽  
Nitrogen Application ◽  
Dry Matter Digestibility ◽  
Metabolisable Energy ◽  
Western Victoria ◽  
Stocking Rates

Summary. This study aimed to define the effect of differing rates of nitrogen application and lock up length on harvested material for silage in south-western Victoria. At 2 sites in south-western Victoria, 140, 3 by 2 m plots of predominantly perennial ryegrass pasture were randomly allocated, within 4 replicate blocks. Five nitrogen fertiliser rates (0, 25, 50, 75, 100 kg N/ha) in combination with 7 lock up lengths were randomly allocated to the 35 plots within each replicate. Nitrogen was applied 1 week after initial lock up (September 10, site 1; September 12, site 2) and harvesting commenced 3 weeks after initial lock up. For each treatment and harvest date, dry matter yield and botanical composition were determined and samples of total pasture and the ryegrass fraction were collected and chemically analysed for dry matter digestibility, crude protein, neutral detergent fibre, water-soluble carbohydrates and mineral content. Metabolisable energy was derived from dry matter digestibility. Increasing rates of nitrogen increased herbage dry matter yield regardless of length of lock up. The yield response was greatest 8 weeks after initial lock up at both sites (site 1, 26 kg DM/kg N; site 2, 14.9 kg DM/kg N). Subsequent regrowth of pasture was increased by nitrogen application over shorter lock up lengths (weeks 3 and 4). Botanical composition was unaffected by treatment during the harvesting period or in the subsequent autumn. Application of nitrogen gave rise to a linear increase in pasture metabolisable energy and crude protein content at both sites until week 5. Thereafter, this response diminished and by week 8 there was a decrease in metabolisable energy and crude protein content. Neutral detergent fibre content was relatively unaffected by nitrogen application until week 8 of the study, at which point there was a linear increase. Application of nitrogen reduced the water-soluble carbohydrate content of pastures throughout the sampling period. It is concluded that application of nitrogen to a mixed sward locked up for silage can increase dry matter yield and, provided pasture is harvested before ryegrass ear emergence, can also have a positive effect on metabolisable energy and crude protein. Given that the decision for removing paddocks from the grazing rotation is based upon pasture growth and stocking rates, the use of nitrogen fertilisers on higher stocked farms could lead to increased dry matter yield over shorter lock up periods. On farms with lower stocking rates shorter lock up periods may allow for pastures to be returned to the grazing rotation earlier, or provide the opportunity for a second harvest of pasture for silage.

scholarly journals Comparison of Dry Matter Yield and Nutritive Components in Two Cultivars of Forage Rice with Different Heading Dates

2021 ◽  
Vol 90 (1) ◽  
pp. 83-91
Author(s):  
Hidekazu Kobayashi ◽  
Koji Nakagomi ◽  
Masayuki Senda
Keyword(s):  
Dry Matter ◽  
Dry Matter Yield ◽  
Forage Rice

The effect of varieties, nitrogen and stubble treatments on successive cycles of grain and forage sorghums in the Ord River valley

1970 ◽  
Vol 10 (42) ◽  
pp. 111 ◽  
Author(s):  
DH Mackenzie ◽  
JJ Basinski ◽  
DB Parbery
Keyword(s):  
Dry Matter ◽  
Ground Level ◽  
Initial Assessment ◽  
Yield Reduction ◽  
Research Station ◽  
Dry Matter Yield ◽  
Standard Variety ◽  
Nitrogen Application ◽  
Progressive Reduction ◽  
Sorghum Production

Two exploratory experiments with re-cycled (ratooned) grain sorghums (hybrid Texas R.S. 610 and standard variety Alpha) and forage sorghums (hybrid Sudax and standard variety Sugardrip) were carried out at Kimberley Research Station to provide data for the initial assessment of sorghum production possibilities in the Ord River area. Re-cycling of sorghum led to progressive reduction in grain and dry matter yields. Grain yield reduction was greater when stubble was cut at the header height (approximately 40 inches) than when it was cut at 6 to 8 inches above ground level and removed. Grain and dry matter yields were higher for Texas R.S. 610 than for Alpha, while dry matter yield of Sudax was also higher than that of Sugardrip. Nitrogen application at 50 lb N an acre and 100 lb N an acre increased grain yields of Texas R.S. 610 and Alpha. It also increased dry matter yields of these two varieties and of Sugardrip, while dry matter yield of Sudax did not respond above the 50 lb N an acre rate of application. Relative, but not absolute, reduction of grain and dry matter yields in successive cycles was diminished by nitrogen application.

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