Agronomy and Crop Sciences Commons^™

Social Trends Emerging In A Mexican Village Community Involved In A Leaf Nutrient Supplementation Project Offered As Nutritional Intervention Scheme, T M. Ostrowski-Meissner, H T. Ostrowski-Meissner

IGC Proceedings (1977-2023)

Social analysis of the leaf nutrient supplementation (LNS) project using protein concentrate from alfalfa in a Mexican village (Saltillo) has been made in an attempt to identify the social trends associated with the community's involvement with protein extraction from green vegetation as a nutritional intervention scheme. Through preliminary on site observation and review of available scheme records, emergent social trends were identified in:

1. the voluntary diversification of nutritional habits,

2. an extension of health services for the community, and

3. subtle change within the village social milieu. The suitability of the LNS project is discussed, and areas for further …

Use Of Leaf Protein As Human Food, R P. Devadas, P Vijayalaks

IGC Proceedings (1977-2023)

Leaf protein obtained from lucerne was fed to pre-school children, for a period of three years. These children who were on leaf protein were compared against those who received milk in the place of leaf protein, leaf protein + 300 calories, 300 calories alone and control group who did not get any supplement. The results indicated that 100 grams of leaf protein provides 397 calories, 60 g of protein, 800 mg of calcium, 50 mg of iron and 1.4 µg of B carotene. Leaf protein is acceptable for pre-school children from poor socio-economic groups. Adults need more persuasion. Leaf Protein …

Effects Of The Leaf Protein On Serum Cholesterol Levels In Rats, T Horigome, Y S. Cho, S Uchida, E Sakaguchi

IGC Proceedings (1977-2023)

The cholesterol-lowering effect of the leaf protein was compared with those of casein and soya bean protein in rats. Unfractionated leaf proteins were prepared from Italian ryegrass and alfalfa by heating the green juice at 85°C. Wet leaf proteins were extracted repeatedly with acetone at room temperature. Rats were given a cholesterol-free, low-fat diet containing each protein source at a protein level of 20% for a period of 3 weeks. There were no differences in the weight gain among rats given casein, soya bean protein and Italian ryegrass leaf protein, while the weight gain of rats given alfalfa leaf protein …

Deproteinized Juice Utilization From Mechanically Dewatered Alfalfa, M Collins

IGC Proceedings (1977-2023)

Mechanical dewatering of alfalfa produces a pressed forage product, a protein concentrate and deproteinized juice. The latter component contains approximately 12% of whole crop DM and can be utilized as a fertilizer material. Several alternatives exist for coagulation of protein from alfalfa juice. An experiment was conducted to evaluate alfalfa yield response to application of whole juice or juice deproteinized by heat, H2SO4 or fermentation. One-half cm surface depth of juice increased shoot yield by 41 % over untreated plants. Alfalfa responded similarly to whole juice or juice deproteinized by either method although maximum yield occurred at a higher rate …

Production Of Fodder Yeast From Brown Juices Of Graminaceous And Leguminous Plants, H Horitsu, H Wakazono, K Imai, K Kawai

IGC Proceedings (1977-2023)

Fractionation of grass (herbage) into leaf protein concentrate (LPC) and crude fiber causes agricultural pollution because brown juice which remained after fractionation contains much minerals and spoilage materials such as sugar and so on. In order to dissolve this problem, for graminaceous plants, green juice was acidified with mineral acid to coagulate LPC. After then, Saccharomyces cerevisiae was cultivated using the brown juice and fodder yeast was obtained in good yield. Next, leguminous plants, green juice was directly fermented by Lactobacillus plantarum to decompose saponin and to coagulate LPC with lactic acid produced by Lact. plantarum. After then, the brown …

Feeding Values Of Alfalfa And Its Dried Press Cake, R Kayama, H Tano, T Nagatomo, I Tasaki

IGC Proceedings (1977-2023)

In order to utilize forage crops effectively, extraction of leaf protein is quite useful, and its utilization has been extensively investigated. When leaf protein is extracted from plants, tremendous amounts of press cake are produced, however, only a few works on its utilization has been conducted. In the present experiment, the digestion trial with sheep was conducted and the feeding value of dried alfalfa press cake was compared with that of sun-cured alfalfa hay. In general, content of dry matter and organic matter was not so much.different between the press cake and the hay, however, the press cake was comparatively …

Immuno-Reactive Fraction-1 (18s) Leaf Protein During Wilting And Ensiling Of Lucerne (Medicago Sativa L.) And Ryegrass (Lolium Perenne L.), J L. Mangan, F A. Harrison

IGC Proceedings (1977-2023)

Antiserum to purified Fraction 1 (18S) leaf protein (ribulose-1,5-bisphosphate carboxylase) raised in N .Z. white rabbits was used to analyse herbage, silage and digesta from the gastro-intestinal tract of sheep by crossed immuno-electrophoresis. Silage trials were carried out with luceme and ryegrass ensiled separately in mini silos containing 1 kg herbage and in larger silos containing 100 kg herbage with replications at 4 levels of dry matter, viz: direct cut, 18.8-21.6%; low wilt, 23.0-32.0%; medium wilt, 31.1-43.5% and high wilt, 38.5-53.2%. Under favourable weather conditions, with long hours of sunshine and low relative humidities and where the high wilt stage …

Assessing The Nutritive Value Of Proteins Extracted From Leucaena Leucocephala: A Comparison Of In Vivo And In Vitro Assays, H T. Ostrowski-Meissner, W Supratman, I Komang

IGC Proceedings (1977-2023)

A comparison was made of in vitro and in vivo methods for the evaluation of protein quality in protein concentrates from leaves (LPC) of tree legume leucaena (Leucaena leucocephala) cultivars Cunningham and Peru grown in Indonesia and harvested during dry and wet seasons. Unfractionated protein concentrates were recovered by steam coagulation at either 85°C or 55°C (within 5 min of maceration and dejuicing). The leaves were evaluated using a number of in vitro and in vivo methods recommended for assessing food and feed grade proteins. In vitro methods used in this study tended to over-estimate the quality of leucaena …

Factors Affecting The Efficiency Of Protein Extraction From Fresh Hybrid Napier Grass, R N. Joshi

IGC Proceedings (1977-2023)

The observations recorded from over four hundred protein extractions from hybrid Napier grass, cultivated under different field conditions, were subjected to statistical analysis to study the extractability of protein through simple mathematical equations. Of the nine parameters considered, the moisture content of the plant had major influence on the percent extractability of protein and yield of fibre feedstuff. The extractability of protein nitrogen was negatively correlated while the yield of fibre was positively correlated with the mean temperature of the day on which the processing was carried out. Using these regression equations it should be possible to predict the yield …

Crops And Conditions For Maximum Production Of Leaf Protein In West Bengal, S Matai

IGC Proceedings (1977-2023)

The paper attempts to summarize the yield potential of a few promising leaf protein (LP) yielding crops grown in alluvial soil tract in the eastern parts of India. Of the different legume crops lucerne was noted to produce maximum LP yield whereas in non-legumes mustard pearl millet produced maximum LP yield. Short duration crops in general gave positive response to higher seed rate whereas in lucerne and berseem where multiple regrowth cut was made, higher seed rate had no effect on LP yield. Leaf protein concentrates obtained from these crops contained 50 to 60% protein. Excepting pearl millet, protein nitrogen …

Energy Flow And Distribution Through Green Crop Fractionation Of Italian Ryegrass, K Kogure, K Watanabe

IGC Proceedings (1977-2023)

The present experiment was carried out to obtain some informations about the energy flow and distribution through the soiling plants, every three fractions, and silage made from the fibrous residue (FR) of Italian ryegrass. The early maturing "Minamiwase" and late maturing "Hitachiaoba" were sown 5 Oct. 1983. The experiments were conducted under three times of first cutting (A; 29 Mar., B; 12 Apr., C; 25 Apr.) following regrowth frequencies of 3, 2, and 2, respectively. Dry matter production of both varieties at first cutting was increased accompanying with the growth progressed including spring flush of crop. The percentage of top …

The Value Of Pasture Height In The Measurement Of Dry Matter Yield, M O'Sullivan, W F. O'Keefee, M J. Flynn

IGC Proceedings (1977-2023)

A double sampling method to measure herbage mass is described. The relationship between herbage mass and pasture height was shown to be curvilinear with a coefficient of determination of 81 % . It was possible with the double sampling technique using both measurements to increase the precision of estimating dry matter (DM). When taking 3 quadrats and 10 extra height measurements the standard deviation of the mean was reduced by 4.5%. The double sampling technique also decreased the workload of estimating herbage mass. It was therefore possible to maintain the same precision of estimation by reducing the number of quadrats …

Prediction Of The Nutritive Value Of Fresh Herbage In The Uk, A H. Adamson, D I. Givens, W P. Barber

IGC Proceedings (1977-2023)

The prediction of the nutritive value of fresh herbage in the UK is currently based on the measurement of modified acid detergent fibre (MADF). The prediction equations used are derived from in vivo measurements made up to 1969. Subsequently Barber et al. (1984) published data on the suitability of a range of predictors indicating the superiority of the neutral detergent fibre cellulase (NCD) technique over MADF. However, this information was based on experiments carried out in one laboratory and variability between laboratories in the measurement of the predictor is an important factor when deciding which predictor is most suitable for …

Predicting In Vitro Digestibility With A Simple Potent Cellulase Procedure, S S. Bughrara, D A. Sleper, O H. Calvert, G C. Marten

IGC Proceedings (1977-2023)

Reliable, inexpensive and rapid methods of determing in vitro dry matter digestibility (DMD) are necessary to evalute animal production potential of a given herbage. The objective of this research was to determine the relationship between DMD measured by a procedure using a potent cellulase solution (from Trichoderma reese1) and by a procedure using rumen liquor. Herbage from 22 species was assayed. Correlations between in vitro DMD determined by the cellulase procedure and rumen liquor procedure ranged from 0.24 to 0.99. Most correlations were highly significant and greater than 0.95. Regression coefficients ranged from 0.26 to 1.43. The cellulase procedure was …

Determination Of Lignin Concentration And Digestibility In Stem Tissue Of Alfalfa By Means Of Quantitative Image Analysis, W Kuhbauch, J Bestajovsky

IGC Proceedings (1977-2023)

Digestibility of important legume forages is determined mainly by the quality of stem. Lignin is a major constituent of the legume cell wall and close relation between digestibility and lignin concentration in legume stem tissue have been found. Cross sections of alfalfa stems have been stained by Phloroglucine/HCl. Lignified tissue, mainly within the xylem and in the sclerenchyma tissue beyond the vascular bundle, appears sharply separated from surrounding stem tissue. This allows to record the respective areas quantitatively. The image analysis data of selected cross sections of alfalfa stems were correlated with chemically analyzed (MnO4-Oxidation) lignin concentration of the total …

Development Of A Conductivity Transducing Cannula For Measuring Forage Intake Of Grazing Livestock, J R. Forwood

IGC Proceedings (1977-2023)

The quantity of forage consumed over a given time by livestock is an extremely important measurement of the quality of that forage. Intake differences may reflect differences in palatability, digestibility, forage chemical composition, rate of passage and overall animal performance. Although forage intake is a critical measurement, much more emphasis has been placed on improving parameters such as forage yield, persistence, and winter hardiness. One reason for this is that the above parameters can be measured with accuracy and relative ease while forage intake measurement of grazing livestock is difficult, expensive and often-times inaccurate. In an attempt to directly and …

The Evaluation Of Fresh Herbage In The Uk, D I. Givens, A H. Adamson, W P. Barber

IGC Proceedings (1977-2023)

A large programme of work has been undertaken by the Nutrition Chemistry Feed Evaluation Unit between 1980 and 1984 to examine temporary grasses and permanent pasture from sites covering England and Wales. The aims of the work reported here have been to provide new digestibility and energy metabolism data and to compare it with that which would have been predicted by the equations in current use in the UK based on modified acid detergent fibre. A total of 131 samples of temporary grass and 40 samples of permanent pasture have been examined in metabolism trials with wether sheep. All trials …

A Study On The Control Of Suaeda Corniculata Bunge In The Fields Of Puccinellia Distans Parl. By Chemicals, Yu Kangfu

IGC Proceedings (1977-2023)

In the Suaeda corniculata Bunge) in the fields of weeping alkaligrass (Puccinellia distans Par!.) by chemical, 5 herbicides of glyphosate, bentazon, dicamba, fosamine and 2,4-D butyl were tested with an efficiency of 80-90% obtained except for fosamine (10%), and among them, 2,4-D butyl was of low cost, low phytotoxicity and good efficiency and was further tested at 0.375, 0.750, 1.500 and 2.250 kg/ha by foliar sprays at seedling, branching and budding stages of the seepweed, and gave 80-90% control of the weed while it had no significant inhibitory effect on the growth of P. distans Par!. Therefore, it was …

Possibility Of Control Of Urophlyctis Alfalfae, The Crown-Wart Agent Of Alfalfa, By The Use Of Cultivars Tolerant To Soil Wetness, G Raynal, J Picard

IGC Proceedings (1977-2023)

Urophlyctis alfalfae, the crown-wart agent of alfalfa, is locally damageable in France in damp or irrigated fields. Field tests, from 1980 to 1983, in plots naturally contaminated by Urophlyctis alfalfae show that among 9 alfalfa cultivars, only those known to be tolerant to soil wetness have a good resistance to U. alfalfae ("Paider" and 2 old french cultivars "Marais de Challans", "Marais de Lm;on"). The use of such cultivars in damp soils would allow to reduce the damages of this disease. The resistance of the 2 old cultivars may have been naturally selected in marshlands where the disease is …

Importance Of Diseases As Constraints To Pasture Legume Adaptation In The Tropical American Lowlands, J M. Lenne, E A. Pizarro, J M. Toldeo

IGC Proceedings (1977-2023)

The importance of diseases as major constraints to pasture legume adaptation in the major ecosystems of the tropical American lowlands is discussed. From 1979 to 1984, diseases were systematically and periodically monitored on species of more than 15 tropical pasture legume genera at 134 sites in more than eight countries. Thirty different diseases were detected and identified, including 24 fungal genera, two bacterial and two nematodal genera, one mycoplasma and several viruses. Most pathogens were causal agents of foliage diseases with potential to cause direct losses in forage yield. On the basis of spatial and temporal distribution and severity, nine …