Effect Of Different Mineral Fertilizers On Yield And Quality Of Grassland,
2026
University of Agricultural Sciences of Keszthely, Hungary
Effect Of Different Mineral Fertilizers On Yield And Quality Of Grassland, Janos Varga, Maria Nagy, Jozsef Schummel
IGC Proceedings (1977-2023)
The effect of different doses of N, P and K fertilizers on the hay yield and the yields of crude protein and amino acids was tested in 3-year investigations conducted on non-irrigated grassland. Nitrogen is the most decisive mineral fertilizer in regard of yield increase and the improvement of forage quality. Exclusive application of 280-360 kg N/ha may give a 140 to 150% increase in hay yields. At the same time, the yields of crude protein and amino acids can be increased by 220-270%. These fertilizer doses raise the crude protein and amino acid contents in hay by about 40 …
Problems Of Nitrogen Nutrition Of Medicago Sativa L. With Respect To Rhizobia,
2026
Vysoka Skola Zemedelska, Brno, Czechoslovakia
Problems Of Nitrogen Nutrition Of Medicago Sativa L. With Respect To Rhizobia, Eduard Halva, Josef Lesak
IGC Proceedings (1977-2023)
The effect of increasing rates of nitrogen (80, 140, 200, 260, and 320 kg/ha) on the yields of above-ground biomass and nutrients in alfalfa was studied in 1974 and 1975. Application of nitrogen increased dry matter and crude protein production in relation to the unfertilized control, but the yield increase was statistically insignificant. Further it was shown that increasing rates of nitrogen had a negative effect on the number and weight of rhizobia. A close negative correlation of high significance ( estimated by the t-test) was found between the rates of nitrogen and the number of rhizobia. The experiments conducted …
Some Remarks Concerning The Theory Of Nutrition And Biology Of Grass Stands,
2026
Vysoka Skola Zemedelska, Brno, Czechoslovakia
Some Remarks Concerning The Theory Of Nutrition And Biology Of Grass Stands, A Korab
IGC Proceedings (1977-2023)
The growth rate and yielding capacity of grasses, expressed as kg crude protein/ha per unit of time, are dependent upon the plants' capacity to take up and utilize nitrogen. This character is specific in individual grass species and has been found to be more or less hereditarily determined and relatively coincident in different sites. These assumptions and interrelations have been utilized for determining the yield indices to express not only the relative yielding capacity of major cultivated grasses but also their requirements in terms of effective nitrogen nutrition. The principle of determining effective doses of nitrogen using the index method …
Nitrogen Fertilization Effect On The Chemical Composition Of Phalaris Arundinacea, Alopecurus Pratensis, And Poa Pratensis,
2026
Instytut Melioracji i Uzytk6w Zielonych, Raszyn, Falenty, Poland
Nitrogen Fertilization Effect On The Chemical Composition Of Phalaris Arundinacea, Alopecurus Pratensis, And Poa Pratensis, Jan Kowalczyk
IGC Proceedings (1977-2023)
Results of investigations with 3 grass species proved that there was not any negative effect of nitrogen fertilization of meadows on muckpeat soils on the forage quality determined by means of chemical analysis. Nitrogen fertilization contributed to a distinct increase of the total nitrogen content as well as of magnesium and, to a lesser degree, zinc contents. The contents of other minerals, except for copper, did not undergo any significant changes, although some differences existed between grass species and between particular cuts. The grass species investigated were deficient in copper, and therefore on soils poor in this element the forage …
Raising The Value Off Orage At Higher Rates Of Nitrogenous Fertilizer Application,
2026
The Grassland Station of the Institute for Scientific System of Farming
Raising The Value Off Orage At Higher Rates Of Nitrogenous Fertilizer Application, Josef Kralovec, Alfred Frycek
IGC Proceedings (1977-2023)
The increasing levels of nitrogenous fertilization increase not only the yield but also the content of nitrates in forage. In dependence on the developmental stage of the stand, on the course of weather, and the fertilizer applied, the concentration of nitrate ions in forage varied; there are not enough data for a detailed analysis yet. Nitrates have a negative importance owing to their reduction to nitrites taking place in the digestive tract of ruminants.
The Effect Of Nitrogen Fertilization And Age Of Regrowth On The Chemical Composition Of Coast Cross No. 1 Bermuda Grass (Cynodon Dactylon),
2026
lnstituto de Ciencia Animal, San Jose de las Lajas, La Habana, Cuba
The Effect Of Nitrogen Fertilization And Age Of Regrowth On The Chemical Composition Of Coast Cross No. 1 Bermuda Grass (Cynodon Dactylon), R Herrera, N Ramos
IGC Proceedings (1977-2023)
The effect of nitrogen fertilization (0, 50, and 100 kg/ha) and regrowth age from 1 to 12 weeks on the chemical composition of Coast Cross cv. No. 1 bermuda grass was studied during the dry season using sprinkler irrigation. Crude protein tended to decrease with age, increasing with the N levels up to 20 % with 100 kg N/ha. Total soluble carbohydrates (TSC) were influenced by age (P < 0.001); the same did not hold true for N. The adjustment of regression equations for lignin and cellulose showed increasing values with respect to age. In vitro DM digestibility (IVDMD) showed significant differences (P < 0.001) only when 100 kg N were applied (50.46%). The two other levels did not differ between them, being 43.45 and 46.11 % for 0 and 50, respectively. The highest value obtained was of 62.07 % in the fourth week with 100 kg N. From the 8th week a sharp trend to decrease was found for all the treatments. Suggested is the use of 100 kg N/ha every twelve weeks and cuts between the fifth and sixth weeks in order to obtain goodquality pastures.
The Effect Of Different Levels Of Peat Decomposition And Nitrogen Fertilization On The Content Of N, Mg, Na, And Cu In Hay,
2026
Instytut Melioracji i Uiytkow Zielonych, Raszyn, Falenty, Poland
The Effect Of Different Levels Of Peat Decomposition And Nitrogen Fertilization On The Content Of N, Mg, Na, And Cu In Hay, Irmina Lekawska, Leon Doboszynski, Andrezej Sapek
IGC Proceedings (1977-2023)
Experiments with increasing nitrogen rates (0-300 kg N/ha/year) were carried out from 1971 to 1974 on meadows situated on peat soils of different decomposition and mucking levels. Nitrogen fertilization resulted in higher nitrogen, magnesium and sodium contents in hay, while the copper content, which was altogether very low, decreased. Soil and ecological conditions, too, produced a distinct effect on the nitrogen, magnesium, sodium and copper contents in hay. The level of the above elements increased along with an increase of the decomposition and mucking levels of peat as well as with a decline in moisture content connected therewith.
Dynamics Of Efficiency And Chemical Composition Of Meadow Grasses,
2026
Akademia Rolnicza
Dynamics Of Efficiency And Chemical Composition Of Meadow Grasses, Jan Filipek, Miroslaw Kasperczyk
IGC Proceedings (1977-2023)
The rate of dry matter growth in meadow grasses was found to increase in dependence on the amounts of fertilizer nitrogen applied. Fertilizer nitrogen stimulated above all the uptake of macro-nutrients by the meadow plants. If the first cut was taken at the heading stage of Festuca pratensis, herbage yield came up to 74 % of the yield obtained when the first cut had been taken at the flowering stage of Festuca pratensis. However, the herbage harvested at the heading stage contained 98 % of the nitrogen, 85 % of the phosphorus, 104 % of the potassium, 91.5% of the …
The Intensification Of Grass Production Through Nitrogen Fertilization, And The Nitrate Problem,
2026
Institut fiir Diingungsforschung Leipzig/Potsdam
The Intensification Of Grass Production Through Nitrogen Fertilization, And The Nitrate Problem, Klau Ebert, Henrich Koriath, Gunter Rinno
IGC Proceedings (1977-2023)
Two-year pot and five-year field tests with increasing nitrogen doses revealed an increase in the nitrate content of forage grasses. In the pot tests the content of 0.25 % N03-N in the dry matter, which is safe in animal nutrition, had by far been exceeded. In the field tests the· nitrate content increased more slowly for the average of the tests and did not reach this limit when giving 140 to 240 kg N/ha. In single cases this value had, however, already been reached when giving 100 kg N/ha. By selecting grass species with a lesser tendency to nitrate accumulation, …
Study On A Proper Nitrogen And Potassium Fertilization Of Forage Grasses,
2026
Jnstytut Uprawy Nawozenia i Gleboznawstwa, Pulawy, Poland
Study On A Proper Nitrogen And Potassium Fertilization Of Forage Grasses, Edmund Nowacki
IGC Proceedings (1977-2023)
The biochemical effect of heavy fertilization with nitrogen and potassium on the yield and the quality of the crop was investigated. The results of experiments performed with both monocotyledonous and dicotyledonous plants indicate that in order to produce a valuable crop of forage plants the nitrogen to potassium ratio must be adjusted in such a way that the nitrates, amines, and nitrosoamines in the plant remain at a low level. Nitrogen and potassium fertilization leads to changes in the accumulation of other minerals in the plants.
Effect Of The Nitrogenous Fertilizer Level On The Performance Of Bulls Grazing On Common Pangola Grass (Digitaria Decumbens Stent.) At Two Stocking Rate Levels,
2026
Est. Exper. de Pastos y Forrajes "Indio Hatuey",.Perico, Matanzas, Cuba
Effect Of The Nitrogenous Fertilizer Level On The Performance Of Bulls Grazing On Common Pangola Grass (Digitaria Decumbens Stent.) At Two Stocking Rate Levels, L R. Valdes, A Perdomo
IGC Proceedings (1977-2023)
A study was made of the effect of nitrogenous fertilization and stocking rate on the live weight gain and the composition of the carcass of bulls grazing on pangola grass. Treatments were five nitrogen levels: 80, 160,240, 320, and 400 kg/ha/year, each with stocking rates of 4 and 6 animals per hectare. No nitrogen level effect was found during the rainy season, while in the dry season the major levels of 240 kg/ha produced greater gains of live weight (P < 0.001). Animals that were submitted to stocking rates of 6 animals/ha gained less and the production per hectare was significantly greater (P < 0.01 ). Animals of higher levels of nitrogen had more adipose carcasses. The results suggest that the increased levels of nitrogen applied in the rainy period influenced the growth of grass and the animals during the succeeding dry period.
The Residual Effect Of Fertilizer Nitrogen On Grassland Within One Growing Season,
2026
Institute for Soil Fertility, Haren (Gr.), The Netherlands
The Residual Effect Of Fertilizer Nitrogen On Grassland Within One Growing Season, W H. Prins, P.F J. Van Burg
IGC Proceedings (1977-2023)
In field experiments it has become clear that at a high level of N fertilization an N reserve can be built up in the soil-plant system which can have a residual effect on the regrowth of a grazed or mown pasture. This residual effect is most apparent when the regrowth is not fertilized with N. In the experiments on clay soil comparisons were made between the amounts of residual N of high-and low-N pretreatments. This was done by calculating the difference between N application and N uptake during the pretreatment period. In the high-N pretreatments this difference was about 80 …
Influence Of Nitrogen On Yield And Variations Of The Botanical Composition Of The Plant Stand At Different Cutting Frequency On Periodically Flooded Meadows BorDering The Lower Course Of The River Niemen,
2026
Yoke Branch of the Lithuanian Research Institute of Agriculture, Soviet Union
Influence Of Nitrogen On Yield And Variations Of The Botanical Composition Of The Plant Stand At Different Cutting Frequency On Periodically Flooded Meadows BorDering The Lower Course Of The River Niemen, Yu Yu Grigalasukas, Ch. C. Chyapas, Z K. Apalia
IGC Proceedings (1977-2023)
Every year since 1950, the Yoke Branch of the Lithuanian Research Institute of Agriculture have been conducting experiments to determine efficient ratios of mineral fertilizers on periodically flooded bottomland meadows along the lower course of the river Niemen. These studies are performed under a programme for developing the fundamentals of a sustained forage basis for industrialized production of dehydrated feed. Fields trials and laboratory experiments have revealed that rates of 240 kg N/ha are optimal for these grasslands. With that level of nitrogen fertilization the yields of dry matter, crude protein and carotene were found to increase, whilst the crude …
The Application Of Liquid Nitrogen To Grass Pastures,
2026
All-Union Williams Forage Research Institute, Moscow Region, Soviet Union
The Application Of Liquid Nitrogen To Grass Pastures, V Iglovikov, V Kulakov, M Vasilevski
IGC Proceedings (1977-2023)
The effect of both liquid ammonia and a solution consisting of ammonium nitrate and urea (30 % N) on forage plant yields and quality was found to be similar to that of ammonium nitrate, and these forms of nitrogen fertilizers are suitable for improving the productivity of grass pastures. Liquid ammonia differs from ammonium nitrate by its longer aftereffect so that it is possible to place the annual amount of nitrogen in one or two portions. Liquid ammonia produces a positive effect on the life activities of ammonifying, nitrifying, and nitrogen-fixing microorganisms. As compared to ammonium nitrate, the amounts of …
Effect Of High Nitrate Fertilization On The Yield And Biological Value Of Grasses Tested By Common Vole,
2026
Zaklad Doswiadczalny Hodowli i Aklimatyzacji R6slin, Bartazek, Poland
Effect Of High Nitrate Fertilization On The Yield And Biological Value Of Grasses Tested By Common Vole, Slawomir Pronczuk, Janina Gnat, Tadeusz Szuperski
IGC Proceedings (1977-2023)
The effect of different fertilization doses ( 4 x 60, 4 x 120, and 1 x 480 kg N/ha) on the yield of grasses and their basic chemical composition as well as on the growth efficiency and health of animals fed those grasses was studied. Yield of grass during three following years was higher from the fields fertili_zed 4 x 120 and 1 x 480 kg N/ha, when compared to 4 x 60 kg N/ha. No differences were found between 1 x 480 kg N/ha and 4 x 120 kg N/ha. Growth ·efficiency of the common voles which were fed …
Nitrogen Fertilization In Tropical Brown Soils In The Escambray Region, Cuba,
2026
Estacion Experimental de Fertilizantes en Pastos, Escambray, Cuba
Nitrogen Fertilization In Tropical Brown Soils In The Escambray Region, Cuba, J L. Aspiolea, O Arteaga
IGC Proceedings (1977-2023)
During 3 years, a study was made of the effect _of increasing quantities of N fertilization (0, 25, 50, 75, and 100 kg/ha/cut) on the yield and mineral content (GP, P, and Mg) of three types of grasses: Coastal Bermuda grass (Cynodon dactylon (L.) Pers.), pangola grass (Digitaria decumbens Stent.), and Guinea grass (Panicum maximum Jacq.), by a split random block design having four replications, under dry conditions. In the statistical analysis of dry matter, differences were found between species, N levels, and species x level interrelation. As a result, the best level of application for all species was that …
Use Of Nitrogen On Pangola Grass (Digitaria Decumbens Stent.) In Cuban Conditions,
2026
Estacion Central de Pastos "Niiia Bonita", Miramar, La Habana, Cuba
Use Of Nitrogen On Pangola Grass (Digitaria Decumbens Stent.) In Cuban Conditions, J J. Paretas
IGC Proceedings (1977-2023)
DM and CP yields and the N efficiency from different sources (ammonium nitrate, ammonium sulphate, and urea) and levels (400, 800, 1200, and 1600 kg/ha/year) and times of applications (M1 = after cutting, M2 = sprouting phase, and M3 = stem formation phase) were studied in two experiments on pangola grass. A factorial desigh and a control (N0) as reference were arranged in both experiments. N sources did not differ. The DM and CP yields were increased (P < 0.001) by the N levels and were significantly affected by the time of application. The efficiency to produce DM and the percentage of recovered N fell drastically when increasing the N level. Data showed that this species can be used intensively during spring time. It is necessary to find out suitable methods to exploit pangola grass economically during the dry season.
Influence Of Differed N Fertilization On Pangola Grass (Digitaria Decumbens Stent.),
2026
Estacion Central de Pastos "Niiia Bonita", Miramar, La Habana, Cuba
Influence Of Differed N Fertilization On Pangola Grass (Digitaria Decumbens Stent.), J J. Paretas, M Cardenas
IGC Proceedings (1977-2023)
An experiment was carried out during two years to study the effect of differed N fertilization on DM and CP yields of pangola grass. A factorial design with four replications was used. N levels were 200 (N1 ) and 400 (N2) kg/ha/year, and the differed systems of application were S1 (after each cut), S2 (at the beginning and at the end of springtime), S3 (at each springtime cut), S4 (at each dry season cut), S5 (75 % of the application at dry season cuts), S6 (25 % of the application at dry season cuts). There was a significant difference (P < 0.001) between the studied factors and their interactions. S2, S3, and S6 produced a marked imbalance between and within the season. S1 showed seasonal imbalance and S4 and S5 produced less grass although these treatments remained constant throughout the experiment. Data showed that the seasonal frame of this plant could be altered by means ofN, and that DM yields of 40 kg/day with 7 % CP or more can be obtained.
Nitrogen Utilization On Permanent Grassland As Dependent On The Level Of Fertilization,
2026
Zootechniczny Zaklad Doswiadczalny Grodziec Slaski, Poland
Nitrogen Utilization On Permanent Grassland As Dependent On The Level Of Fertilization, Gustaw Michna
IGC Proceedings (1977-2023)
Within the frame of 10-year fertilization trials on permanent grassland, the nitrogen utilization at rising levels of nitrogen fertilization (0, 100, 200, 300, 400, and 500 kg/ha) was investigated in 1965, 1968, 1971, and 1974. Apart from dry matter and nitrogen yields, the botanical composition of the plant population and the amount of precipitations were established as well. The level of nitrogen utilization was rather high, being higher in dry years than in wet ones. As nitrogen fertilization increased, the degree of fertilizer nitrogen utilization declined as follows: at 400 kg N /ha to 80 %, at 500 kg N/ha …
Effect Of Autumn And Spring Dates Of Application Of Nitrogen Fertilizer On The Herbage Yield And Crude Protein Content In Dry Matter,
2026
Vyskumny Ustav Luk a Pasienkov, Banska Bystrica, Czechoslovakia
Effect Of Autumn And Spring Dates Of Application Of Nitrogen Fertilizer On The Herbage Yield And Crude Protein Content In Dry Matter, Ondrej Tomka, Eugen Lihan
IGC Proceedings (1977-2023)
In the hilly region where nitrogen was applied early in spring and just after the intensive growth phase of the grass sward the production of dry matter was more or less the same. If nitrogen is applied in autumn, especially in the case when the soil will be frozen very soon, it comes to higher volatile losses of nitrogen. It is very similar in the case that the influence of nitrogen is longer than one month. The crude protein content of the grass sward and also its production were highest when the fertilizer was applied just before the intensive growth …
