Effect Of Nitrogen Fertilization In Combination With Potassium And Phosphorus And Cutting Frequency On The Yield Of Brachiaria Ruzizensis In Adamawa, Cameroon,
2025
Insitute of Animal Research Wakwa
Effect Of Nitrogen Fertilization In Combination With Potassium And Phosphorus And Cutting Frequency On The Yield Of Brachiaria Ruzizensis In Adamawa, Cameroon, E T. Pamo, D Pieper
IGC Proceedings (1977-2023)
Fertilizers have been shown to increase forage yields under some conditions (Owensby and Smith, 1975), but has very little effect under other conditions (Stoddart et al., 1975). Thus in recent years a great deal of attention has been focussed on the ways and possibilities of increasing forage production by fertilization. Various experiments have been conducted on the response of Brarhiaria ruziziensis Germain and Evrad, one of the best perennial forage grasses of the region, to fertilization at Wakwa Animal Research Station. Yonkeu et al., (1986) indicated that application of phosphorus did not lead to improved yield of the forage on …
Fixation De L’Azote Chez Le Trèfle Blanc (Trifolium Repens L.) Interactions Entre Le Deficit Hydrique Et La Fertilization Potassique,
2025
INRA ENSAIA
Fixation De L’Azote Chez Le Trèfle Blanc (Trifolium Repens L.) Interactions Entre Le Deficit Hydrique Et La Fertilization Potassique, A Guckert, L Shamsun Noor, C Robin, D Schontz
IGC Proceedings (1977-2023)
Le role du potassium au niveau de l'etat hydrique des vegetaux et notamment des processus d'osmoregulation est bien connu (Mengel, 1984). Dans ce contexte nous avons cherche a determiner l'effet d'un apport d'engrais potassique sur le comportement du trefle blanc en situation de deficit hydrique. Nos observations ont porte sur ]'evolution du potentiel de base, de l'activite photosynthetique et de la fixation d'azote.
White Clover (Trifolium Repens L.) For Low Input Pastoral Farming Systems,
2025
Grasslands Divison, NZ
White Clover (Trifolium Repens L.) For Low Input Pastoral Farming Systems, A D. Mackay, J R. Caradus
IGC Proceedings (1977-2023)
In temperate regions, white clover (Trifoliurn repens L.) is the predominant legume in pastures, because while fixing N it is able to withstand the stresses of grazing (Brougham et al., 1978). White clover is however a poor competitor for soil phosphate (P). This is of particular significance when many soils in New Zealand and throughout the world are P deficient. Regular inputs of P fertilizer are required to maintain the vigour and productivity of this forage legume. The increasing costs of manufacture and application of P fertilizer and at the same time the general decline in demand for agricultural …
The Effect Of Adjusting Soil Availbale N/P Ratio Through Fertilizing On The Growth Of Alfalfa,
2025
Shanxi Agricultural University
The Effect Of Adjusting Soil Availbale N/P Ratio Through Fertilizing On The Growth Of Alfalfa, Zhongping Li, Shuzhen Wan, Jianqiang Zhao
IGC Proceedings (1977-2023)
Our past experiments indicated that on calcareous soils, growing alfalfa for 5-7 years without phosphorus application led too large a soil available N/P ratio to keep the normal yield and quality of alfalfa production (Lin et al., 1964; Li, 1972). If phosphorus can be added sufficiently when alfalfa is grown, not only the Rhizobium nitrogen fixation can be promoted to keep a proper N/P ratio for alfalfa growth, but also a beneficial condition can be created for the following crops. (Li et al., 1988 ; Li, 1983).
Alimentation Minerale, Niveau Hydrique Et Utilization De L’Eau Par La Luzerne,
2025
Centre Universitaire de Dschang
Alimentation Minerale, Niveau Hydrique Et Utilization De L’Eau Par La Luzerne, Micheline Anneessens
IGC Proceedings (1977-2023)
L'eau est souvent un facteur limitant !es rendements puisque des problemes se posent au niveau de sa repartition dans l'espace et dans le temps. Aucune etude n'a encore montre comment dose et composition d'engrais interagissent avec l'humidite du substrat sur ]'utilisation de l'eau par une plante fourragere forte consommatrice de cette ressource.C'est dans ce but que le present essai a ete realise sur la luzerne.
Valorization Des Elements Mineraux Autres Que L’Azote Contenus Dans Les Effluents D’Elevage,
2025
ITCF
Valorization Des Elements Mineraux Autres Que L’Azote Contenus Dans Les Effluents D’Elevage, J C. Taureau, D Ziegler
IGC Proceedings (1977-2023)
Les doses de lisier appliquees sur une culture sont generalement calees sur la valeur azotee du produit. L'apport comprend en plus des quantites importantes de P20s, MgO, CaO et oligoelements dont le role fertilisant merite d'etre precise dans !es conditions de plein champ. L'efficacite fertilisante du phosphore et du potassium a ete etudiee en pot (Amberger, 1982-83). Notre but est de montrer a partir de trois dispositifs de longue duree, dont un seul sera detaille ici, !es consequences d'epandages plus ou moins massifs de lisier sur la composition des fourrages et !'evolution chimique des sols.
Improving The Efficiency Of Phosphorus Fertilizer Use In Northern Australia,
2025
Department of Primary Industries
Improving The Efficiency Of Phosphorus Fertilizer Use In Northern Australia, M Gilbert
IGC Proceedings (1977-2023)
Phosphorus (P) deficiency is common in the extensive grazing country of northern Australia. Fertilizer recommendations for establishment and long term stability of improved pastures are imprecise because there is little understanding of the residual effects of P fertilizer in soil. Soil tests to monitor the fate of P fertilizer on cattle properties are of little value owing to variability, insufficient precision and the difficulty in sampling large pasture areas. Mathematical approaches to the problem are warranted in order to simplify fertilizer recommendation. Models to predict fertilizer P requirement have been developed for pastures (Bowden and Bennett, 1974; Probert and Williams, …
Improving The System Of Irrigated Cultivated Pasture Fertilization In Ussr,
2025
Timiryazev Agricultural Academy in Moscow
Improving The System Of Irrigated Cultivated Pasture Fertilization In Ussr, N G. Andreev
IGC Proceedings (1977-2023)
The state cattle-breeding farm « Zarya Kommunisma » of the Moscow region is an example of efficient utilization of cultivated irrigated pastures. Here under the guidance of the scientists of the Timiryazev Agricultural Academy 961 hectares of irrigated pastures have been established (Andreev, 1988 ; Markin, 1987). 3500 dairy cows with the average 6001 kg milk yield per cow per year are being pastured.
The Influence Of Cow Manure On Forage Yields Of King Grass In A Ferrasol In Cuba,
2025
Instituto de Ciencia Animal
The Influence Of Cow Manure On Forage Yields Of King Grass In A Ferrasol In Cuba, G Crespo, M Oduardo
IGC Proceedings (1977-2023)
Experiments conducted in sandy and brown soils in Cuba demonstrated the beneficial effect of manure for accelerating the establishment of forage plants, and the possibility of diminishing up to 50 % the dosage of N fertilizer requirements to obtain maximum forage yield (Crespo and Diez 1978; Crespo and Arteaga 1984). The aims of the present experiments were: a) to determine the best time of application of cow manure and b) to learn the influence of manure and nitrogenous fertilizer on forage yield of king grass in a ferrasol soil.
Changes In Grassland Sward Caused By Different Levels Of Phosphorus And Potassium Fertilization, After 5 Years Of Application,
2025
Institute for Land Reclamation and Grassland Farming
Changes In Grassland Sward Caused By Different Levels Of Phosphorus And Potassium Fertilization, After 5 Years Of Application, K Krynski
IGC Proceedings (1977-2023)
There are many speculations concerning fertilizer management. Effects of the potassium fertilization are not univocal defined. The phosphorus effect is observed after a few years. Mistakes in proportions of the fertilizers applicated on grasslands appear often. Their effects are difficult to observe at once. Destructions of the long term unbalanced fertilization can be difficult to repair. The experiment is aimed at finding the effect of different levels of fertilization on grassland. The paper presents part of data characterizing the 5th experimental year.
Optimization Of Grassland Ecosystem Production By Anthropogenic Treatment,
2025
University of Agriculture, Nitra
Optimization Of Grassland Ecosystem Production By Anthropogenic Treatment, R Holubek, J Jancovic
IGC Proceedings (1977-2023)
Abundant amount of the new knowledge was gained by an intensive research of grassland ecosystem in Czechoslovakia and other European countries during last 25 years. It was confirmed that under favourable humid conditions and sufficient macronutrients and micronutrients together with adequate Nfertilizing should be nearly reached ecologically conditioned level of potential productivity and dry matter or N-compounds yields should be increased by 100-200 or 200-300 per cent respectively (Velich, 1986). Introduction of scientific methods of controlled agricultural production together with higher landscape protection requirements, stability of ecosystems, quality and healthproved foods requirements have changed the traditional views to the nutrition …
Effets De La Modulation De La Fertilization Azotee Sur La Productive Du Brachiaria Decumbens,
2025
CEMAGREF
Effets De La Modulation De La Fertilization Azotee Sur La Productive Du Brachiaria Decumbens, Francoise Artus-Poliakoff, F Champenhet
IGC Proceedings (1977-2023)
Pour le choix d'especes ameliorees, selectionnees pour !'intensification fourragere a la Martinique, Brachiaria decumbens presente une faible sensibilite aux phenomenes saisonniers (Artus, 1986), mais sa productivite n'en demeure pas moins variable malgre !'irrigation complementaire en saison seche (Artus-Poliakoff et al., 1988). La fertilisation azotee, indispensable a !'expression des potentialites de rendement d'une telle graminee, accentue ces variations saisonnieres par stimulation de la croissance en periode favorable a la vegetation (CaroCostas et al., 1960; Salette, 1971). L'ajustement du chargement a la quantite d'herbe disponible ou le report fourrager sous forme de foin ou d'ensilage sont des techniques difficiles a maitriser et …
Effect Of Fertilizer Application On The Productivity Of Native Hay At Syanboche Yak Farm, Nepal,
2025
FAO RAS
Effect Of Fertilizer Application On The Productivity Of Native Hay At Syanboche Yak Farm, Nepal, D Pariyar, C Samuel
IGC Proceedings (1977-2023)
The Syangboche Yak Farm is situated at an altitude of 3700 m a.s.l. on the bank of Mount Everest. The annual maximum mean temperature is 7.6°C and minimum temperature 0.5°C. Rainfall is around 1103 mm concentrated between June and September. The soil type is characteristic of the alpine soils in the Himalayan area, lithosols and regosols. The pastures observed in the experiment are located in the highest level of the forest comprising mainly Abies spectabilis, Betula utilis, Juniperus recurva and Rhododendron anthopogon species. The forage resources of that zone are under permanent pressure due to the grazing of yak during …
Productivity Of Trifolium Pratense L., T Repens L., And Lotus Corniculatus L. In Acid Soil Of Highland Region Of Yugoslavia,
2025
University of Belgrade
Productivity Of Trifolium Pratense L., T Repens L., And Lotus Corniculatus L. In Acid Soil Of Highland Region Of Yugoslavia, M Jevtic
IGC Proceedings (1977-2023)
Perennial legumes are an important source of fodder in highland regions of Yugoslavia. Three legume spp. were chosen for this trial: Trifolium pratense, T. repens and Lotus corniculatus (components of highland spontaneous ecosystems). Posibilities of growing them as pure stands were investigated when treated with mineral N, or seed inoculation. The effectiveness of inoculation depends on soil caracteristics: the best results were obtained on acid soils (Misistin and Siljnikova, 1968). The spontaneous types of Rhizobium trifolii and R. lotus exist in most types of highland soils in Yugoslavia (Vojinovic et al., 1978). The effect of inoculation is the most …
Experiment Of Trace Elements Fertilizer Spraying On Sown Pasture,
2025
Hunan Agricultural University
Experiment Of Trace Elements Fertilizer Spraying On Sown Pasture, Tu Minyi
IGC Proceedings (1977-2023)
The application of compound phosphate in the way of rotationary fertilizing in sections in successive years kept the vigorous growth of pasture composed of perennial ryegrass (Lolium perenne) and white clover (Trifolium repens) in the first several years after the pasture was grazed in 1981. But the pasture could not keep the growing vigour even with the same level of fertilization in the last two years. Considering the unbalanced nutrition being one of the major reasons, a preliminary experiment of trace elements spraying has been undertaken in Nanshan Sown Pasture-land aiming at identifying if trace fertilizers …
The Effect Of Soil Acidity And Nitrogen Fertilization On Yield Of White Clover And Perennial Ryegrass In Pure Stands And In Mixture,
2025
The Warsaw Agricultural University
The Effect Of Soil Acidity And Nitrogen Fertilization On Yield Of White Clover And Perennial Ryegrass In Pure Stands And In Mixture, P Stypinski, G Kocialkowska
IGC Proceedings (1977-2023)
In spite of all advantages white clover is considered to be of a low persistency and is often eliminated from sward by various environmental factors (Frame, 1984). So the common use of white clover demands determining and examining all factors that influence its persistance. One of such factors is the low level of soil pH. Like all legumes white clover is susceptible to the high soil acidity. The tolerance of white clover to the soil acidity has not been determined precisely. This tolerance is from 4,2 according to Ziemiecka (1969) to 4,5 (Wood and Cooper, 1984). Frame (1984) recommends a …
Reponse Du Paturage Naturel A La Fertilization Azotee Sur Sol Basaltique En Adamaqua Camerounais,
2025
Institut de Recherches Zootechniques
Reponse Du Paturage Naturel A La Fertilization Azotee Sur Sol Basaltique En Adamaqua Camerounais, E Pamo, S Yonkeu
IGC Proceedings (1977-2023)
Les paturages demeurent et demeureront encore pendant longtemps la principale source d'alimentation des ruminants en Afrique. Cependant, au Cameroun en general et dans le plateau de l'Adamaoua, berceau de l'elevage en particulier, la baisse de leur production inquiete de plus en plus les pastoralistes. Aussi s'avere-t-il necessaire de trouver Jes moyens permettant de renverser cette tendance et d'ameliorer cette situation. S'il est certain que des etudes (Yonkeu et al. 1985; Yonkeu et al., 1986; Pamo et al., 1989) ont ete menees sur la reponse des fourrages cultives a la fertilisation dans l'Adamaoua, tres peu de travaux a ce jour ont …
Some Nitrogen Forms And Micronutrients In Silage Maize Leaves As Affected By Nk Fertilization And Liming,
2025
Estacao Agronomica Nacional
Some Nitrogen Forms And Micronutrients In Silage Maize Leaves As Affected By Nk Fertilization And Liming, C.L F. Carranca, M A. Castelo Branco
IGC Proceedings (1977-2023)
The nutritive value of a forage depends on the quality which, in time, is dependent on protein, sugar, cellulose, fat and mineral elements content. The existence of deficiencies may limit the maximum yield and also the quality. Several experiments have been carried out in order to study the effect of liming and NK fertilization on the nutrients uptake by silage maize and yields.
The Diagnosis Of Grassland Mineral Nutrient Status Through Herbage Analysis,
2025
INRA
The Diagnosis Of Grassland Mineral Nutrient Status Through Herbage Analysis, J Salette, Lydie Huche
IGC Proceedings (1977-2023)
It appears more and more clearly that soil analysis is not sufficient to give a good approximation of the mineral status of grassland soils. In perennial crops leaf analysis and empirical critical levels are widely utilized. This grassland approach emphasizes the good results which can be obtained for nitrogen, potassium, phosphorus not from leaf but from the whole herbage plant analysis. This paper deals with pure grass stands.
Modelling Nutrient Uptake By A Grass Sward: Long Term Studies Over Several Years,
2025
INRA
Modelling Nutrient Uptake By A Grass Sward: Long Term Studies Over Several Years, J Salette, Lydie Huche
IGC Proceedings (1977-2023)
Many experiments were conducted to assess the short term effects of fertilization management on nitrogen and mineral uptake of cut or grazed swards. One important work was performed to model the grass nutrition status during a regrowth (Salette, 1982; Salette et al., 1983; Salette et al., 1989), but for both a theoretical and practical point of view it is of great interest to evaluate the evolution of N and mineral uptake throughout all the years of a pasture life. This paper gives an analysis of nitrogen and mineral uptake dynamics during several years and proposes a model for sward N …
