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Articles 511 - 540 of 3654
Full-Text Articles in Entire DC Network
Collection And Evaluation Of The Section Platycarpe From The Peoples Republic Of China, T A. Cambell, G Bao, Z L. Xia
Collection And Evaluation Of The Section Platycarpe From The Peoples Republic Of China, T A. Cambell, G Bao, Z L. Xia
IGC Proceedings (1977-2023)
The Peoples Republic of China is the center of origin of several species of the section Platycarpae, which could contain genes for drought and cold tolerance that would be of significant benefit to cultivated alfalfa (Medicago sativa L.) Of particular interest are Medicago archiducis-nicolai Sirjaev, M. edgeworthii Sirjaev, and M. ruthenica (L.) Ledebour. Of 105 M. ruthenica accessions collected from 15 diverse environments in Inner Mongolia, 50 were evaluated in the field at Beltsville MD (USA) in 1993 and 1994 on an acid soil (pH 6.4) deficient in boron and potassium. Significant variation was noted for stand retention, reaction to …
Assessing The Impact Of Dietary Addition Of Lignin On Growth Performance, Nitrogen Balance And Faecal Microorganisms In Grain-Fed Veal Calves, L E. Phillip, E S. Idziak
Assessing The Impact Of Dietary Addition Of Lignin On Growth Performance, Nitrogen Balance And Faecal Microorganisms In Grain-Fed Veal Calves, L E. Phillip, E S. Idziak
IGC Proceedings (1977-2023)
A study was conducted with ALCELLR - lignin (A-lignin) to evaluate its impact on performance of grain- fed veal calves. Thirty two male calves (avg. initial wt, 190 kg) were fed for 13 weeks grain corn and a protein supplement with added A-lignin to supply 0, 1.25%, 2.5% or 5.0% of diet. Eight other calves were used to study nitrogen balance, and grab samples of faeces were analyzed for anaerobic, aerobic and coliform bacteria. A-lignin at 1.25% of diet increased (p<.01) weight gain by 12%. Addition of A-lignin also decreased (p< 0.01) organic matter digestion, increased (p<.01) faecal N excretion but did not significantly alter N balance. A-lignin reduced (p< 0.01) faecal ammonia concentration but increased (p <.01) DM content of grab samples of faeces; there were no significant effects on populations of faecal microorganisms. The study revealed a beneficial effect of A-lignin on calf growth but the reason for the response was not uncovered.
Seed Proteinase Inhibitors From Annual Medics Active Against Insect Pests, M Odoardi, A Tava, F Ceciliani
Seed Proteinase Inhibitors From Annual Medics Active Against Insect Pests, M Odoardi, A Tava, F Ceciliani
IGC Proceedings (1977-2023)
Several different species of annual medics have been tested for the occurrence and concentration of trypsin inhibitors in the seed. Trypsin Inhibitory Activity (TIA) has been in fact related to the level of resistance to biotic and abiotic stresses. Wide variation was found for TIA among species, with the highest values shown by the snail medic (Medicago scutellata). After a simple and rapid procedure of chromatographic purification, the Trypsin Inhibitor (TI) from snail medic has been tested towards the trypsin-like proteinases extracted from larvae of different phytophagous insects, showing high levels of Inhibitory Activity. The complete amino acid …
The Effect On Intake Palatability And Digestibility Of Phenolic Compounds In Tagasaste (Chamaecytisus Proliferus), N J. Edwards, J C. Mailey, D M. Mcneill, J B. Lowry, C S. Mcsweeney, D A. Henry, C M. Oldham
The Effect On Intake Palatability And Digestibility Of Phenolic Compounds In Tagasaste (Chamaecytisus Proliferus), N J. Edwards, J C. Mailey, D M. Mcneill, J B. Lowry, C S. Mcsweeney, D A. Henry, C M. Oldham
IGC Proceedings (1977-2023)
The major secondary metabolites currently identified in tagasaste (Chamaecytisus proliferus) belong to the phenolic group of compounds. The principal phenolic compounds are the flavones, apigenin and luteolin, but low concentrations of condensed tannins, the isoflavonoid daidzein and the alkaloid sparteine have also been detected in some samples. No flavonols have been detected. There is a strong relationship between the concentration of phenolic compounds in tagasaste and its palatability. Furthermore, digestibility of tagasaste is relatively high throughout the year, thereby implicating intake as the major factor influencing the seasonality of liveweight performance of livestock grazing tagasaste. Despite confirmation of …
Feeding Strategies To Optimize Reproductive Performance Of Cattle Grazing High Protein Pastures In Uruguay, H R. Tosi, K M. Wittenberg
Feeding Strategies To Optimize Reproductive Performance Of Cattle Grazing High Protein Pastures In Uruguay, H R. Tosi, K M. Wittenberg
IGC Proceedings (1977-2023)
Alternative feeding strategies were investigated for Holstein heifers grazing a vegetative red, Trifolium pratense L., and white clover, Trifolium repens L., pasture. A total of 474 grazing heifers were supplemented varying amounts of corn silage, Zea mays, during the breeding season in an effort to improve reproductive performance. Animal response to supplementation, whether on spring or winter pasture, was similar. Corn silage supplemented at 18.8 or 28.8% DM basis of total diet, for winter and spring pastures, respectively, resulted in animal weight gains similar to that of heifers receiving legume pasture only. Serum urea nitrogen and reproductive performance for heifers …
Strategies For Improving Efficiency Of Beef Cattle In Tall Fescue Pasture Systems, J C. Waller, H A. Fribourg
Strategies For Improving Efficiency Of Beef Cattle In Tall Fescue Pasture Systems, J C. Waller, H A. Fribourg
IGC Proceedings (1977-2023)
A beef (Bos taurusL.) cattle producer must allocate land and forage resources to meet nutrient needs of the entire herd. Using 20 yr of calving and grazing data, templates of herd composition, associated Total Digestible Nutrients (TDN) requirements over the whole year, and forage TDN production were developed for a typical herd and land area. The monthly energy needed by the entire herd was relatively constant. Forage productivity varied monthly, indicating the need to plan for efficiently using surplus TDN from some seasons to meet needs at other times. This approach could be expanded to include more definitive …
Use Of Willows (Salix Spp) As Drought Fodder For Sheep, S K. Oppong, P D. Kemp, G B. Douglas, B T. Bulloch
Use Of Willows (Salix Spp) As Drought Fodder For Sheep, S K. Oppong, P D. Kemp, G B. Douglas, B T. Bulloch
IGC Proceedings (1977-2023)
The effects of cutting height and harvesting times on the forage yield, yield components and quality of Tangoio hybrid willow and Kinuyanagi willow were examined, to evaluate these willows as drought fodder for sheep. Tangoio (3.8 tDM/ha) outyielded Kinuyanagi (3 tDM/ha) in edible forage production and provided reasonable quality fodder (nitrogen content of 2.0 % and digestibility of 65 -69 %). The high edible forage yield of the willows relative to pasture (0.8 tDM/ha) during January and April showed that they provided potentially valuable supplements to pasture production. The willows, especially Tangoio, are recommended for use as maintenance fodder for …
The Assimilating And Benefit Of The Chinese Reed Canarygrass (Phalaris Arundinacea L.) On Soil Nutrition, Zhou Bihua, Qi Guang
The Assimilating And Benefit Of The Chinese Reed Canarygrass (Phalaris Arundinacea L.) On Soil Nutrition, Zhou Bihua, Qi Guang
IGC Proceedings (1977-2023)
The Chinese Reed Canarygrass (Phalaris arundinacea L.) is a fine perennial herbage of Gramineae. The wild ripened seeds were collected and sown on the experimental field of the Zhelimu Animal Husbandry College. The former plant of experimental plot is Chinese Crabapple and the cultivating layer is light loam with pH 8.7. The content of nitric N is 33.58 kg/ha, amino N 42.54 kg/ha, organic P 5.6 kg/ha, k 55.97 kg/ha. Clones were set up according to different compositions, that is N, P, K, WP, NPK, CK. the total amount of fertilizer is 23.8 g. The coefficient of absorbing and …
Productivity Of Fodder Beet On Sandy Soil In Egypt, M A. El-Nahrawy, A Z. Abd El-Halim, H S. Oushy
Productivity Of Fodder Beet On Sandy Soil In Egypt, M A. El-Nahrawy, A Z. Abd El-Halim, H S. Oushy
IGC Proceedings (1977-2023)
Farmyard manure effect on the productivity of five fodder beet varieties grown on sandy soil was investigated during three successive seasons. It was revealed from the results that FYM can effectively convert the non-productive sandy soil to a relatively productive soil. FYM application resulted in an increase of 145, 97, 55, 40, 39 and 43% for dry matter. Fresh matter, germination percentage, plant height, root length and root diameter, respectively, averaged over varieties and seasons.
Brachiaria Brizantha Response To Phosphorus Rates In The Nutrient Solution, F A. Monteiro, R A. Martim, W T. Mattos
Brachiaria Brizantha Response To Phosphorus Rates In The Nutrient Solution, F A. Monteiro, R A. Martim, W T. Mattos
IGC Proceedings (1977-2023)
Seven phosphorus rates in the nutrient solution were studied in a greenhouse experiment for Brachiaria brizantha (Hochst) Stapf. Plants had 54 days of growth and 49 days of regrowth. Significant responses in forage yield, tiller number and root dry weight were found. Plant tops were divided into four parts and phosphorus concentration in each one significantly changed with phosphorus rates. Sampling of the young leaf blades and analyzing for phosphorus is proposed for diagnostic purposes. A critical phosphorus concentration of 1.2 g kg-1 is suggested as the critical level in the young leaf blades.
Bahiagrass Forage Production And Quality As Effected By Municipal Biosolids, R M. Muchovej, J E. Rechcigl
Bahiagrass Forage Production And Quality As Effected By Municipal Biosolids, R M. Muchovej, J E. Rechcigl
IGC Proceedings (1977-2023)
Production of biosolids has been increasing consistently in the last few years. Land application of wastes is being regarded as an alternative means of disposal and as a source of inexpensive fertilizer material. Pastures are particularly attractive in this regard since the areas occupied are extensive and large amounts of fertilizer are required for adequate production. The objective of this study is to investigate the effects of various rates of biosolids on bahiagrass yield and quality. Forage samples were collected from each plot from April to December. Significant increases in dry matter production, crude protein content and in vitro digestibility …
Effect Of N And P Fertilizers On Nutritive Value Of Dwarf Elephantgrass (Pennisetum Purpureum) Cv N-75 Mott, J R. Faria, B Gonzalez, J Faria-Marmoll, D E. Morillo
Effect Of N And P Fertilizers On Nutritive Value Of Dwarf Elephantgrass (Pennisetum Purpureum) Cv N-75 Mott, J R. Faria, B Gonzalez, J Faria-Marmoll, D E. Morillo
IGC Proceedings (1977-2023)
Crude protein (CP), Ca and P concentrations and in vitro dry matter digestibility (IVDMD) of irrigated dwarf elephantgrass (Pennisetum purpureum cv. N-75 Mott) as affected by the factorial combination of N (0, 150, 300 and 450 kg N/ha/year) and P (0, 50 and 100 kg P205/ha/year) fertilization was evaluated in a tropical dry forest in Zulia State, western region of Venezuela. A randomized complete block design with three replications was used. Soil was a low-fertility sandy-loam Udic Paleustalf (pH 6.1). Nitrogen fertilization did not influence (P>0.05) any of the variables. Mean CP, IVDMD, Ca and P were: 8.13, …
Effect Of The N And P On Yield And Sward And Dwarf Elephant Grass Pennisetum Purpureum Cv. Mott., J R. Faria, B Gonzalez, J Faria
Effect Of The N And P On Yield And Sward And Dwarf Elephant Grass Pennisetum Purpureum Cv. Mott., J R. Faria, B Gonzalez, J Faria
IGC Proceedings (1977-2023)
The effect of nitrogen and phosphorus application on yield and sward structure as height and leaf, stem and dead forage composition of dwarf elephant grass (Pennisetum purpureum Schumach) cv. Mott was studied under field conditions and complementary irrigation, during one year at very dry tropical forest with a semiarid climate in Venezuela. The nitrogen (N) and Phosphorus (P) rate were 0, 150, 350, 450, kg ha-1 year and 0, 50 and 100 kg P2O5 ha-1 year respectively. The N rate increased the plant height (81.52 cm), leaf, stem and death production (10, 8.13, and 1.62 t DM ha-1 respectively) …
Effects Of Different Phosphate Fertilizers On Pasture Nutrition And Soil Phosphorus In Canterbury, New Zealand, L M. Condron, K M. Goh
Effects Of Different Phosphate Fertilizers On Pasture Nutrition And Soil Phosphorus In Canterbury, New Zealand, L M. Condron, K M. Goh
IGC Proceedings (1977-2023)
A field trial was conducted over 6 years to assess the relative performance of three phosphate (P) fertilisers of differing solubility (single superphosphate, ‘longlife’ superphosphate, ‘reactive’ phosphate rock) on a permanent pasture at Methven in Canterbury, New Zealand. Plant P uptake data showed that while the overall relative effectiveness of the fertilisers was closely related to their water-soluble P content (single superphosphate > ‘longlife’ superphosphate > ‘reactive’ phosphate rock), the agronomic efficiency of the sparingly soluble phosphate rock fertiliser improved markedly with time. Soil P analysis demonstrated that significant dissolution of phosphate rock had occurred in the soil, and the findings of …
Field Evaluation Of Soil Acidity Acidity Effects On The Growth Of Annual And Perennial Ryegrasses, N Miles
Field Evaluation Of Soil Acidity Acidity Effects On The Growth Of Annual And Perennial Ryegrasses, N Miles
IGC Proceedings (1977-2023)
Soil acidity limits pasture establishment and productivity in the moister eastern half of South Africa. Sound lime requirement guidelines based on soil test data are required. In the study reported here, lime responses of annual (Lolium multiflorum) and perennial (Lolium perenne) ryegrasses were evaluated in irrigated field trials located on acidic, highly weathered soils. Annual ryegrass (yield response to lime 27 to 32%) was found to be markedly more tolerant of soil acidity than perennial ryegrass (yield response 68%). Acid saturations of up to 20% had little impact on the yield of annual ryegrass, while yield …
Yield And Quality Of Sugarcane As Affected By Phosphate Applied Cation On Soils Of Various Phosphorus Levels, M A. Matin, K Oya, T Shinjo, T Horiguchi
Yield And Quality Of Sugarcane As Affected By Phosphate Applied Cation On Soils Of Various Phosphorus Levels, M A. Matin, K Oya, T Shinjo, T Horiguchi
IGC Proceedings (1977-2023)
Effects of phosphate application on the growth, yield and quality of sugarcane (Saccharum officinarum L.) were studied on the soils having various phosphorus levels. Superphosphate was applied to bring the available soil P at 5, 15, 25 and 35 mg P2O5 100 g-1 designated as A, B, C and D levels, respectively. Leaf area index (LAI) and dry matter increased on the higher P plots over the lower P plots. The highest cane yield (74 t ha-1) and sugar yield (10.2 t ha- 1) were obtained from the B plot and the lowest cane yield (51 t ha-1) and sugar …
Evaluation Of Different Bradyrhizobium Sp Strains On Nitrogen Fixation Capacity In Four Forage Legumes, F O. Gallardo, E S. Lopes, M C. Diez
Evaluation Of Different Bradyrhizobium Sp Strains On Nitrogen Fixation Capacity In Four Forage Legumes, F O. Gallardo, E S. Lopes, M C. Diez
IGC Proceedings (1977-2023)
Eleven available strains of Bradyrhizobium sp were used to test four forage legumes, Crotalaria juncea (Crotalaria), Cajanus cajans (Guandu), Styzolobium deeriagianum (Mucuna-Ana) and Cyamopsis tetragonoloba (Guar) for symbiotic N-fixation ability. Greenhouse experiments were conducted for nine weeks in order to evaluate shoot, root, and nodule dry weight, nodule number, and shoot nitrogen content. Four strains presented relative nitrogen efficiency (RNE) over 100% with Crotalaria cultivar, whereas only one strain was more efficient with Guandu and Mucuna cultivars. Strain 633 was the only one which presented a high yield with Crotalaria, Guandu and Mucuna-Ana cultivars.
N-P-S Fertilizer Effects On Herbage Yield And Brute Protein Contents In An Irrigated Perennial Pasture In South Patagonia, L San Martino, H M. Espina, E Cittadini
N-P-S Fertilizer Effects On Herbage Yield And Brute Protein Contents In An Irrigated Perennial Pasture In South Patagonia, L San Martino, H M. Espina, E Cittadini
IGC Proceedings (1977-2023)
Little research has been done to determine the effect of fertilization on irrigated pastures in Santa Cruz (South Patagonia). The objective of the present study was to estimate the effects of NPS fertilizing effects on forage yield and quality. The trial was set up in 1994 on a Borolic Haplargid soil characterized by low N content (0.00875% total N), low P availability (9 ppm Olsen) and medium alcalinity (pH 8.4). Pasture was dominated by tall fescue (95%) with 5% of alfalfa. A Complete Radom Design was used and N-P2O5-S nutrients were applied at rates of 120-100-50 kg.ha-1. Monthly mowing began …
Symbiotic Behaviour Of Alfalfa Varieties Grown In Different Soils, C Scotti, S Gnocchi, M Carelli, P Rotili
Symbiotic Behaviour Of Alfalfa Varieties Grown In Different Soils, C Scotti, S Gnocchi, M Carelli, P Rotili
IGC Proceedings (1977-2023)
Six alfalfa (Medicago sativa) varieties were grown in two contrasting soils to study their symbiotic ability as estimated by nodule biomass and dry matter yield in presence of the natural population of rhizobia of soil. Varieties can be discriminated on the basis of total (year) nodule biomass; their ranking for nodule biomass was consistent in the different soil types although soils significantly influenced nodulation and dry matter yield.
Long Term Effects Of Liming A Basalt-Derived Soil, On Lucerene And Phalaris Production, K.M. F. Reed, J F. Chin
Long Term Effects Of Liming A Basalt-Derived Soil, On Lucerene And Phalaris Production, K.M. F. Reed, J F. Chin
IGC Proceedings (1977-2023)
Lime incorporated into a basalt-derived clay loam lowered exchangeable aluminium in soil. Soil pH was still elevated, 9 years after 2 t/ha of lime was incorporated. With lower rates of lime the density of lucerne plants declined. Lucerne yield more than doubled with lime. After six years, the area was sown to a phalaris-clover pasture. A 15% increase in the yield of phalaris was recorded from limed plots over the next three years. Despite this, 11 years after liming, herbage P concentrations increased with lime, from 0.28% to 0.35%.
Can Maize Influence The Dissolution Of Low Water Soluble Phosphorus Fertilizers?, S Sinaj, E Frossard
Can Maize Influence The Dissolution Of Low Water Soluble Phosphorus Fertilizers?, S Sinaj, E Frossard
IGC Proceedings (1977-2023)
The objectives of this study were to evaluate the respective importance of maize (Zea mays) and soil properties on the dissolution of two sparingly soluble P fertilizers. The surface horizon of an acidic and a calcareous soils were amended with Thomas’ slag or phosphate rock and were either incubated or cultivated with maize. Maize cultivation increased the rate of dissolution of both fertilizers in both soils. Its influence remained limited compared to fertilizer dissolution in the incubated acidic soil. In the calcareous soil, however, the presence of maize increased significantly the rate of fertilizer dissolution compared to that observed in …
Phosphorus Availability, Defoliation Tolerance, And Genetic Differentiation In White Clover, D F. Chapman
Phosphorus Availability, Defoliation Tolerance, And Genetic Differentiation In White Clover, D F. Chapman
IGC Proceedings (1977-2023)
The genetic composition of mixed populations of white clover growing in low fertility, grass-dominant hill pastures was estimated four and eight years after populations were established. Populations were based on an adapted ('Grasslands Tahora') or poorly adapted ('Grasslands Huia') cultivar, and received either no fertiliser, or 35kg P /ha /year. The P response curve of surviving plants was also determined, and compared with plants grown from 'standard' seedlines of the respective cultivars. Between years 4 and 8, the proportion of the populations constituted by plants true-to-type for the sown cultivar remained steady at 56 - 58% for Tahora, but fell …
Potassium Rates For Macrotyloma Axillare Growth, R A. Martim, F A. Monteiro, P.R. L. Portilho
Potassium Rates For Macrotyloma Axillare Growth, R A. Martim, F A. Monteiro, P.R. L. Portilho
IGC Proceedings (1977-2023)
The response of the tropical forage legume macrotiloma guata (Macrotyloma axillare (E. Mey) Verdc) to potassium rates was studied in a greenhouse experiment. The plants were grown in nutrient solution with seven potassium (K) rates, 0; 3.5; 7; 21; 35; 105 and 245 mg l-1 of solution, in randomized complete block design, with four replications. There was significant response of the legume to potassium rates. Considerations are made on the influence of these levels on plant dry matter yield in two harvests, root dry matter production and potassium and magnesium concentrations in the plant tissue.
Phosphogypsum As A Source Of Nutrients For Bahiagrass, J E. Rechcigl, I S. Alcordo
Phosphogypsum As A Source Of Nutrients For Bahiagrass, J E. Rechcigl, I S. Alcordo
IGC Proceedings (1977-2023)
Phosphogypsum is a by-product of the manufacture of phosphoric acid from phosphate rock and is a potential source of sulfur and calcium for crops. There are currently more than 700 million Mg of phosphogypsum in Florida alone stacked in waste piles and an additional 30 million Mg produced annually. A 3-year study was conducted to determine whether addition of phosphogypsum to bahiagrass would increase production and quality. Results indicate that addition of up to 4.0 Mg/ha phosphogypsum increased bahiagrass yields, protein content, and in vitro digestibility of forage. This study has demonstrated that phosphogypsum can be used as an alternative …
A Review Of Centrosema Pascuorum (Centurion) Cvv. Cavalcade And Bundey As A Pasture Legume In The Ley Farming System Studies In North West Australia, K Thiagalingam, D Zuill, T Price
A Review Of Centrosema Pascuorum (Centurion) Cvv. Cavalcade And Bundey As A Pasture Legume In The Ley Farming System Studies In North West Australia, K Thiagalingam, D Zuill, T Price
IGC Proceedings (1977-2023)
Field experiments and commercial experience with the pasture legume Centrosema pascuorum (centurion) in the Katherine and Douglas Daly districts of the Northern Territory over the past ten years were reviewed. Results show that cultivars of this species (Cavalcade and Bundey) have good potential for improving both soil fertility and the quality of dry season forage (as hay or grazing) for cattle in mixed farming systems in the semi-arid tropics of north west Australia.
Effect Of Plant Age And N And P Fertilization On Mineral Composition Of Andropogon Gayanus, D E. Morillo, A Caraballo, J Faria-Marmoll, L R. Mcdowell
Effect Of Plant Age And N And P Fertilization On Mineral Composition Of Andropogon Gayanus, D E. Morillo, A Caraballo, J Faria-Marmoll, L R. Mcdowell
IGC Proceedings (1977-2023)
Mineral concentrations of Andropogon gayanus Kunth, as affected by age of regrowth, 42 and 63 days (six and four cuttings); rate (kg/ ha/year) of N fertilizer, 0, 100 and 200, and of P2O5, 0 and 75, were evaluated on a sandy-loam Aridisol (pH 5.5) in Venezuela, using a split-split-plot experimental design with two replications. Forage mineral concentrations did not differ (P>0.05) among ages. Mean Ca, P, Mg, Na were: 0.20, 0.11, 0.10 and 0.029 %, and regarded as deficient for ruminants. Only K (1.21 %) was considered adequate. Mean Fe, Zn, Cu, Mn and Co were 57, 24, 2.7, …
Interaction Of Endomycorrhizal Fungi And Phosphate On Neonotonia Wightii, Lackey, V T. Paulino, O.M. A.A. Ghisi, M.A. C. Lucena, M J. Valarini, J C. Werner
Interaction Of Endomycorrhizal Fungi And Phosphate On Neonotonia Wightii, Lackey, V T. Paulino, O.M. A.A. Ghisi, M.A. C. Lucena, M J. Valarini, J C. Werner
IGC Proceedings (1977-2023)
This experiment was carried out in greenhouse condition, to study the effect of four phosphorus levels (20, 80, 140 and 200 kg of P2O5/ ha) with or without fungi mycorrhizal inoculation (Acaulospora longula + A. morrowae ). Five accessions of Neonotonia wightii (Wightii & Arn) Lackey (perennial soyabean) were studied: Malawi, Tinaroo, NO1264, NO409 and NO 250. The growth of Neonotonia was improved by the phosphorus fertilization.The effect of VAM inoculation was greater in the lower levels of P fertilization reducing its effect in the higher levels of P applied. The presence of soluble P induced higher N accumulation …
Different Response Of Lucerne (Medicago Sativa L.) Cultivars To P And Zn Fertilization And Susceptibility To Phosphorus-Induced Zinc Deficiency On Calcareous Soils, Gansu, China, Chen Wen, Graham Eagleton, Graeme Blair
Different Response Of Lucerne (Medicago Sativa L.) Cultivars To P And Zn Fertilization And Susceptibility To Phosphorus-Induced Zinc Deficiency On Calcareous Soils, Gansu, China, Chen Wen, Graham Eagleton, Graeme Blair
IGC Proceedings (1977-2023)
The three pot experiments were carried out at the Qingyang Research Station, Gansu, China to determine the yield response of P and Zn, and examine the effect of soil types on P and Zn requirement of the local and introduced lucerne cultivars in the establishment phase on calcareous soils. The results showed marked growth and dry matter yield benefit at lucerne establishment when P fertiliser was applied on both soils. There were no consistent difference among the three cultivars in response to added P. A significant shoot yield response to Zn was only recorded at high P supply in the …
Application Of N And P Fertilizers On Pasture Of Southern Italy: Effects On Forage Species, Production And Quality, D Ferri, G Convertini
Application Of N And P Fertilizers On Pasture Of Southern Italy: Effects On Forage Species, Production And Quality, D Ferri, G Convertini
IGC Proceedings (1977-2023)
The effects of N and P fertilization on the productive and qualitative characteristics of improved pastures in inside Southern Italy areas were investigated. The trial was carried out in two sites characterized by different altitude above sea level and soil properties; also previous fertilization treatments and botanical composition characteristics are significantly different. The N fertilization reduced negative effects of climatic variations (typical of these areas) on botanical composition of “Bella” grassland at lower altitude. On the contrary a more stable botanical composition assured good yields and quality of forage at “Li Foy” field (higher a.s.l.) because more regular weather conditions …
Long-Term Effects Of Co2 Enrichment And Temperate Increase On Forage Quality In A Temperate Grass, J F. Soussana, J M. Besle, I Chabaux, P Loiseau, P C. De Faccio Carvalho
Long-Term Effects Of Co2 Enrichment And Temperate Increase On Forage Quality In A Temperate Grass, J F. Soussana, J M. Besle, I Chabaux, P Loiseau, P C. De Faccio Carvalho
IGC Proceedings (1977-2023)
Perennial ryegrass swards were grown during two years at two N fertilizer supplies in elevated (700 ppm) or ambient atmospheric CO2 concentration at outdoor temperature and at + 3°C in elevated CO2. Elevated CO2 and temperature increase had only minor impacts on the digestibility and on the fiber composition of the cut material. On average, the water soluble carbohydrate concentration of the leaf laminae was doubled in elevated CO2, whereas a 3°C temperature increase reduced this concentration by 25 %.