Effects of Nitrogen Application on Nitrogen Content of Grains of Swamp Rice in Sierra Leone

1972 ◽  
Vol 8 (2) ◽  
pp. 155-160 ◽  
Author(s):  
D. K. Das Gupta
Keyword(s):  
Protein Content ◽  
Sierra Leone ◽  
Crude Protein ◽  
N Uptake ◽  
Crude Protein Content ◽  
Nitrogen Application ◽  
N Application ◽  
Total N ◽  
Rice Grains ◽  
Nitrogenous Fertilizer

SUMMARYThe total N uptake, crude protein content, and recovery of N in rice grains varied with varieties. Increased levels of N application gave increases in total N uptake and crude protein content in the grains, though recovery of N in the grains decreased with increased levels of nitrogen application. Irrespective of varieties and levels of application, three split dressings of nitrogenous fertilizer gave greater total N uptake, crude protein content, and recovery of N in the rice grains than where all the N was applied at the time of transplanting of seedlings.

scholarly journals Nitrogen Application Frequency for Drip-irrigated Tomatoes

HortScience ◽  
1991 ◽  
Vol 26 (3) ◽  
pp. 250-252 ◽  
Author(s):  
Wilton P. Cook ◽  
Douglas C. Sanders
Keyword(s):  
N Uptake ◽  
Fruit Size ◽  
Nitrogen Application ◽  
N Application ◽  
Total N ◽  
Tomato Plants ◽  
Nitrogen Levels ◽  
N Concentration ◽  
Application Frequency ◽  
Raised Bed

Studies were conducted to determine the effect of N application frequency through drip irrigation on soil NO3-N movement in the bed profile and on yield and N uptake by tomato plants (Lycopersicon esculentum Mill. `Sunny') at two locations. Increasing N application frequency resulted in increased yields at Clayton, N. C., but not at Charleston, S.C. The number of fruit produced was not affected by N treatment at either location, but fruit size increased with increasing N application frequency at Clayton. Foliage N concentration decreased seasonally, but neither foliage N concentration nor total N content of the above-ground portion of the plants was affected by N application frequency. Regardless of N application frequency, NO3-N concentrations within the raised bed decreased with time due to plant uptake and leaching. Nitrogen levels declined most rapidly in the area closest to the drip tube.

scholarly journals Evaluation of Five Different Plant Nutrients for Their Effect on Yield, Quality, and Postharvest Condition of Bell Peppers in a Subtropical Environment

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 672f-673
Author(s):  
L.P. Brandenberger ◽  
R.P. Wiedenfeld ◽  
D. Makus
Keyword(s):  
N Uptake ◽  
Dry Weight ◽  
Fruit Weight ◽  
Nitrogen Application ◽  
Fertilization Program ◽  
N Application ◽  
Total N ◽  
Yield Increase ◽  
Wall Strength ◽  
Bell Peppers

Fertilization programs used commercially for bell peppers (Capsicum annuum) in the subtropical Lower Rio Grande Valley of Texas may vary substantially from recommendations based on research. Therefore, a commercial fertilization program used on a significant fraction of the pepper production in this area was evaluated at two locations. Preplant soil tests showed NO3-N levels were low at one location and very high at the other. Nitrogen application where preplant soil NO3-N was low resulted in a six-fold yield increase (from 197 to 1203 kg·ha–1), and improvements in fruit weight, fruit volume, fruit density, wall thickness, wall strength, and carotenoid and chlorophyll a and b contents. No other nutrient application at either location or N application at the site where preplant soil NO3-N levels were high significantly affected yield by size class, fruit quality characteristics, storage properties, or mineral and organic components. Nitrogen application had the greatest effect on dry-weight accumulation and N uptake during fruit set and maturation when N demand was high. Where N responses were observed, N application increased total dry weight in plant and fruit by 150% and total N uptake by 186%, yet this increase amounted to a N fertilizer uptake efficiency of only 12%. Thus, N should be used judiciously to prevent pollution of drainage and ground waters.

Effects of fertilizer N and number of years in tillage on the protein content of feeding barley straw (cv. Nessa) and on N uptake and recovery

1976 ◽  
Vol 87 (2) ◽  
pp. 251-254 ◽  
Author(s):  
T. F. Gately
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
N Uptake ◽  
Barley Straw ◽  
Fertilizer N ◽  
Sowing Time ◽  
Calcium Ammonium Nitrate ◽  
Total N ◽  
Grazed Pasture ◽  
The Mean

SUMMARYThe effects of six amounts (0, 17, 34, 51, 68 and 85 kg N/ha) of fertilizer N, applied at sowing time as calcium ammonium nitrate, on the crude protein (N × 6·25) content of barley straw sown as the first, second and fourth or later tillage crop after grazed pasture were studied over three seasons at a total of 126 sites. In addition total N uptake and apparent recovery of fertilizer N were calculated for each cropping sequence.The mean crude protein content of the 126 sites was 4·1% without N, increasing to 4·8% with 85 kg N/ha. Maximum protein content with 85 kg N/ha ranged from 4·4% in 1971 to 5·4% in 1973. It was highest in the year which gave the lowest straw yields. Protein content was higher when the barley was sown as the first or second crop after pasture than when it was sown as the fourth or later crop. Incremental of fertilizer N gave only small increases or decreases in straw protein contents. Over all sites straw protein content amounted to about 36% of grain protein contents. There was a significant positive relationship between grain and straw protein contents.Nitrogen uptake in the straw without fertilizer N was 19, 18 and 12 kg/ha in barley sown as the first, second and fourth or later tillage crop after grass. The total uptake of N in the grain and straw combined was 93, 102, 107, 109, 111 and 116 kg N from applications of 0, 17, 34, 51, 68 and 85 kg/ha of fertilizer N. The mean apparent recovery of fertilizer N in the straw varied from 12% with 17 kgN/ha to 8% with 85 kg N/ha.

Effect of nitrogen application on dry matter yields, nutritive characteristics and mineral content of summer-active forage crops in southern Australia

2011 ◽  
Vol 51 (1) ◽  
pp. 77 ◽  
Author(s):  
J. L. Jacobs ◽  
G. N. Ward
Keyword(s):  
Brassica Napus ◽  
Protein Content ◽  
Crude Protein ◽  
Dry Matter ◽  
Water Soluble ◽  
Crude Protein Content ◽  
Forage Crops ◽  
Brassica Napus L ◽  
N Application ◽  
Short Supply

In the dryland areas of southern Australia, summer-active forage crops have been traditionally grown to provide additional home-grown feed during a period when pasture is often in short supply. Dry matter (DM) yields are often variable and the use of nitrogen (N) fertiliser is considered a viable option to increase such yields. The effect of applying N fertiliser to the summer-active species, forage brassica cv. Hunter (Brassica campestris L. × Brassica napus L.), forage brassica cv. Winfred (Brassica napus L.), turnips (Brassica rapa L. cv. Barkant), chicory (Chichorium intybus L. cv. Grouse), plantain (Plantago lanceolata L. cv. Tonic), sorghum sudangrass hybrid cv. Sweet Jumbo [Sorghum bicolour (L.) Moench × Sorghum sudanese (Piper) Stapf.], millet (Echinochloa utilis Ohwi & Yabuno) and a mixture of Winfred and millet (1 : 5) over two summer periods were measured. N was applied at 0, 40, 80, 120, 160 and 200 kg N/ha with half of the N being applied ~5–6 weeks after sowing for all crops and the remainder immediately following the first grazing of regrowth crops and at 9 weeks after sowing for turnips. DM yield responses to applied N were variable, with increases only being observed in the first year. For the regrowth forages (all forages except turnips), the DM yield increase occurred during the second growth period and reflects higher than average rainfall during that period. The crude protein content of all forages generally increased with increasing N application in both years, with the highest response being 0.14% per kg N applied. In contrast, the water-soluble carbohydrate content of forages decreased with N application. The results from this study indicate that the effect of applying N fertiliser to summer forages is limited by available moisture and subsequent active growth of the forage. Where there is adequate moisture, N application can improve DM yield and also the crude protein content of most summer forages. Application of N to summer forages should be seen as a tactical decision based on available soil moisture and active plant growth to ensure N uptake and subsequent DM accumulation.

Early productivity and crude protein content of establishing forage swards composed of combinations of native grass and legume species in mixed-grassland ecoregions

2013 ◽  
Vol 93 (3) ◽  
pp. 445-454 ◽  
Author(s):  
Jenalee M. Mischkolz ◽  
Michael P. Schellenberg ◽  
Eric G. Lamb
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Plant Density ◽  
Warm Season ◽  
Forage Yield ◽  
Schizachyrium Scoparium ◽  
Legume Species ◽  
Crude Protein Content ◽  
Native Grass ◽  
Western Wheatgrass

Mischkolz, J. M., Schellenberg, M. P. and Lamb, E. G. 2013. Early productivity and crude protein content of establishing forage swards composed of combinations of native grass and legume species in mixed-grassland ecoregions. Can. J. Plant Sci. 93: 445–454. We evaluated the early establishment productivity of forage swards of native, perennial, cool and warm season grasses, and legumes as they have the potential to provide non-invasive, productive, and drought resistant rangelands. Seven species with agronomic potential and a broad native geographic distribution were selected for testing including: nodding brome [Bromus anomalus (Coult.)], blue bunch wheatgrass [Pseudoregneria spicata (Pursh)], western wheatgrass [Pascopyrum smithii (Rydb.)], side oats grama [Bouteloua curtipendula (Michx.)], little blue stem [Schizachyrium scoparium (Michx.)], purple prairie clover [Dalea purpurea (Vent.)], and white prairie clover [Dalea candida (Willd.)]. Forage swards, including all seven monocultures, 21 two-species mixtures and a mixture with all species, were planted in two sites, Saskatoon and Swift Current, Saskatchewan. Western wheatgrass (WWG) had the highest overall plant density and the strongest effect on the forage yield of the forage swards; however, productivity and crude protein content were not reduced when other species were also included in the forage sward. Dalea spp. did not establish as well as the other species, but had the highest crude protein concentrations. This work provides insight into forage sward development at the establishment stage; additional work is required to determine long-term species impacts for well established forage swards.

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