Some effects of clipping the tops upon the root development of lucerne (Medicago sativa L.)

1934 ◽  
Vol 24 (4) ◽  
pp. 532-539 ◽  
Author(s):  
H. G. Thornton ◽  
Hugh Nicol
Keyword(s):  
Medicago Sativa ◽  
Nitrogen Content ◽  
Total Nitrogen ◽  
Root Development ◽  
Free Food ◽  
Mean Size ◽  
Medicago Sativa L ◽  
Nitrogen Contents

V. Summary and abstract1. Inoculated lucerne was grown in pots of sand and watered with nitrogen-free food solution. In some of the pots the lucerne was clipped once, in some twice and in some it was left unclipped. Pots were harvested on four dates at intervals of about three weeks. Counts and measurements of nodules were made and dry weights and nitrogen contents of tops and roots were obtained.2. Clipping did not significantly alter the nodule numbers, their mean size, or the total nitrogen contents of the plants, i.e. in tops, including clippings, plus roots.3. Clipping, however, resulted in a decrease in the nitrogen content of the roots of about 40 per cent, as compared with undipped plants. This nitrogen was transferred to the tops where it was removed in the clippings.

scholarly journals CONTENT OF TOTAL NITROGEN AND PROTEINS FROM ALFALFA (Medicago sativa L.) COLLECTED IN THREE SLOPES

2019 ◽  
Vol 34 (3) ◽  
pp. 635-640
Author(s):  
Valentina Butleska Gjoroska ◽  
Liljana Koleva Gudeva ◽  
Lenka Cvetanovska
Keyword(s):  
Medicago Sativa ◽  
Protein Content ◽  
Plant Cell ◽  
Total Nitrogen ◽  
Nitrogen Concentration ◽  
Protein Composition ◽  
Forage Crops ◽  
Protein Nitrogen ◽  
Forage Crop ◽  
Medicago Sativa L

Alfalfa (Medicago sativa L.) leaves and stems contain different proteins and nitrogen concentration in different stages of growth. The objective of this study is to determine the dynamic of nutrient accumulation of total nitrogen and proteins in leaves and stems. The experiment was conducted in three slopes, on three regions in the Republic of North Macedonia (Tetovo, Skopje and Ovche Pole). Chemical analysis of total nitrogen and proteins were obtained from first, second and third slope. Modern techniques have been used for analyzing the protein activity of plant material in multiple measuring points. Significant differences are found in the production of total nitrogen and proteins between the locations in Tetovo region on one side, and Skopje and Ovche Pole on the other side. It shows that Tetovo region has better conditions for producing alfalfa protein. Alfalfa is a culture that is rich in high nitrogen and protein content in the Tetovo region, which is correlated with the amino acid composition, resulting in a high biological value. Therefore, alfalfa is the dominant forage crop and active diet culture with high applicability to the bio-diet. Proteins are the most abundant biomolecules in plants and other organisms. Protein macromolecules make up half of the dry matter in the plant cell. The plant cell contains many different proteins with a specific function. Proteins contain the most important property - biological specificity, so the individuality of each organism is conditioned by the type of protein it is made of. Proteins have a specific structure that is found in their biological activity. Proteins are the most important components in the plant cell. Nitrogen is one of the many compounds important for plant life processes and its role in physiological processes in plants is quite large. The needs of certain plants for nitrogen are different. Nitrogen in plants is important in the composition of proteins, nucleic acids, coenzymes, alkaloids, some pigments and other compounds. Accordingly, the nitrogen in plants exists as non-protein and protein nitrogen, found in the protein component. It can only enter the plant cell if it is reduced to ammonia. This scientific research paper provides a comprehensive analysis of the nitrogen and protein composition of alfalfa grown in the Skopje, Tetovo and Ovche Pole region. The results of this research, represent the first full and complete overview of alfalfa (Medicago sativa L.), with its protein composition, which would be of great importance for the further cultivation of this forage crop. Scientific evidence has shown that the Tetovo region has a higher advantage over the Skopje and Ovche Pole region in terms of nitrogen and protein content, which are crucial nutrients in forage crops.

scholarly journals EFEITO DO ESTRESSE HÍDRICO E DOSES DE POTÁSSIO NA PRODUTIVIDADE DA ALFAFA (Medicago sativa L.)

Irriga ◽  
2000 ◽  
Vol 5 (2) ◽  
pp. 110-118
Author(s):  
Hatiro Tashima ◽  
Antonio Evaldo Klar
Keyword(s):  
Water Stress ◽  
Medicago Sativa ◽  
Nitrogen Concentration ◽  
Water Levels ◽  
The Other ◽  
Natural Soil ◽  
The Third ◽  
Aerial Parts ◽  
Medicago Sativa L ◽  
Nitrogen Contents

EFEITO DO ESTRESSE HÍDRICO E DOSES DE POTÁSSIO NA PRODUTIVIDADE DA ALFAFA (Medicago sativa L.)  Hatiro TashimaFundação Faculdade de Agronomia “Luiz Meneghel”, DEER,  Cx. Postal 261, CEP 86.350 -000, Bandeirantes - Pr - Fone: (0xx43) 543 8046 - E'mail: [email protected] Evaldo Klar2Dep. de Eng. Rural -FCA -UNESP - Cx. Postal 237 - CEP 18603-970 - Botucatu - SPFone: (0xx14) 6820 - 7165; Fax: 6820 - 7194 -E'mail: [email protected]  1 RESUMO Foi estudada, em condições de campo, a produtividade da alfafa (Medicago sativa L.) submetida  a cinco níveis de água e quatro doses de potássio. O delineamento experimental foi inteiramente ao acaso em um esquema fatorial 5x4 com 3 repetições.  Os níveis de água foram definidos como A1, A2, A3, A4 e A5, os quatro primeiros  corresponderam às tensões mínimas de -0,01; -0,05; -0,1; -1,5 MPa, respectivamente, e o nível A5 recebeu apenas água da chuva. As doses de potássio foram definidas como: K1 correspondeu o teor natural de potássio no solo (2,5 mmolc dm-3), K2, K3 e K4 corresponderam as aplicações de 117,3; 351,9 e 821,1 g de K / parcela de 6 m2, respectivamente.O experimento foi avaliado do terceiro até o oitavo corte. Pelos resultados obtidos, pode-se concluir que: as combinações entre níveis de água A2 e A3 com doses de potássio K3 e K4 produziram maior quantidade de massa seca no  total de seis cortes; os níveis de água não afetaram a concentração do nitrogênio (N) na parte aérea, exceto no 6º corte em que o tratamento A5 foi significativamente superior  e no 7º o tratamento A4 foi significativamente inferior em relação a outros tratamentos; as maiores doses de potássio aplicadas no solo propiciaram maiores teores do elemento na parte aérea da  planta, no entanto verificou que a concentração do nitrogênio diminuiu.   UNITERMOS: Alfafa, estresse hídrico, potássio.  TASHIMA, H., KLAR, A. E. Effect of water stress and potassium doses on alfalfa (Medicago sativa L .) yield.  2 ABSTRACT             This study was developed to evaluated the effect on alfalfa (Medicago sativa L) of four minimum soil water potentials (MPa): - 0.01 (A1); - 0.05 (A2); 0.1 (A3); 1.5 (A4) and A5, without any irrigation and four doses of potassium (mmol/dm3 ): K1 – 2.5 natural soil content; K2 – 117.3;  K3 – 351.9; K4 – 821.1 of K per plot of 6 m2. The harvest was divided in 8 cuts, but only 6 of them were evaluated, from the third to eight.            The combinations among A2 and A3 with K3 and K4 resulted on higher dry material of plants; water levels did not affected nitrogen concentration of plants, except the 6th cut, when A5 showed significantly higher and A4, at the 7th cut,lower values in relation to the other treatments. The highest potassium doses showed highest potassium doses in aerial parts of plants, but decreased the nitrogen contents. KEYWORDS: alfalfa, water stress, potassium.

Estimación de biomasa aérea de forrajes de invierno bajo riego a través de un dron

2019 ◽  
Vol 12 (4) ◽  
Author(s):  
Francisco Gavi Reyes ◽  
César Botello-Aguillón ◽  
Leonardo Tijerina-Chávez ◽  
Arturo Galvis-Spíndola ◽  
Rodrigo Roblero-Hidalgo
Keyword(s):  
Medicago Sativa ◽  
Avena Sativa ◽  
Medicago Sativa L

E Objetivo: Desarrollar un procedimiento para estimar biomasa con imágenes digitales captadas desde un dron y modelación 3D (ID-Dron-3D) aplicable en alfalfa (Medicago sativa L.) y avena forrajera (Avena sativa L.). Diseño/metodología/aproximación: Con una cámara digital acoplada al dron se obtuvieron imágenes antes de la cosecha de los cultivos, que fueron procesadas con software para luego estimar volumen de biomasa. En cada cultivo se midió altura de la planta y área cosechada, volumen aparente y real de biomasa, y peso de biomasa fresca y seca. Resultados: Con base en el análisis de regresión se obtuvieron modelos lineales a una p<0.05 para predecir: biomasa fresca en avena (R2=0.70) y alfalfa (R2 =0.47); y biomasa seca en avena (R2=0.78) y en alfalfa (R2=0.31) mediante ID-Dron-3D. Limitaciones del estudio/implicaciones: Considerando las R2 de los modelos obtenidos, los resultados en la avena forrajera fueron mejores, respecto a los detectados en alfalfa, lo cual se puede deber a la mayor variabilidad de la cobertura vegetal, ya que, en algunas unidades de muestreo, las plantas de alfalfa no cubrían completamente el suelo. Hallazgos/conclusiones: El rendimiento de biomasa fresca y seca de ambos cultivos se correlacionó significativamente con su respectivo volumen aparente estimado con imágenes digitales tomadas desde un dron y su procesamiento 3D (ID-Dron-3D).

ALFALFA (Medicago sativa L.) CULTIVADA EN CAMPECHE, MÉXICO Y SU INTEGRACIÓN LOCAL EN LA ALIMENTACIÓN DE CORDEROS EN CONFINAMIENTO

2018 ◽  
Vol 11 (9) ◽  
Author(s):  
CC. Castillo-Águilar
Keyword(s):  
Medicago Sativa ◽  
Pennisetum Purpureum ◽  
Medicago Sativa L

Se comparó el uso de diferentes dietas con base en heno de alfalfa cultivada (Medicago sativa L.) en Campeche y su relación con un concentrado comercial y pasto Taiwán (Pennisetum purpureum), T1=concentrado comercial, T2=T1+heno de alfalfa, T3=T1+pasto Taiwán, T4=heno de alfalfa. Se evaluó el comportamiento productivo y metabólico de corderos en sistema intensivo utilizando 20 corderos machos con encaste de Pelibuey, Dorper y Black Belly de 12.5±1 kg de peso vivo (PV). Se midió el consumo de materia seca total (CMS), la ganancia diaria de peso (GDP), la conversión alimenticia (CA), y la digestibilidad in situ de la materia seca (DISMS). También fueron evaluados el pH, nitrógeno amoniacal (NH3) y la concentración de ácidos grasos volátiles (AGV) en líquido ruminal. La mejor GDP en gramos por día, de 234 g (p?0.05) se obtuvo en el T2; en contraste, el T3 mostró la menor GDP. La dieta que incluyó la mezcla de heno de alfalfa y concentrado mejoró significativamente las condiciones de las variables pH, NH3 y AGV (p?0.05).

ALFALFA VARIETIES ZONED IN THE CENTRAL CHERNOZEM ZONE OF THE RUSSIAN FEDERATION

2020 ◽  
Author(s):  
Galina Stepanova
Keyword(s):  
Medicago Sativa ◽  
Dry Matter ◽  
Maximum Yield ◽  
The State ◽  
Average Yield ◽  
State Register ◽  
Independent Evaluation ◽  
Medicago Sativa L ◽  
Alfalfa Varieties ◽  
Central Chernozem

The article describes the main morphological and biological features of alfalfa varieties included in the State register of breeding achievements approved for use in the Central Chernozem zone of Russia. A total of 32 alfalfa varieties are included in the State register. This is 9 varieties of blue alfalfa (Medicago sativa L. subsp. Sativa) of domestic selection and 8 foreign, 11 varieties of variable alfalfa (Medicago sativa L. nothosubsp. varia (Martyn) Arcang.) domestic selection and 1 variety of foreign and 3 varieties of yellow alfalfa (Medicago sativa L. subsp. falcata (L.) Arcang.). It shows the average and maximum yield of varieties determined in the process of state variety testing, as well as independent evaluation in research institutions in the region. Varieties of blue alfalfa of domestic selection Kevsala, Elena, Satellite, Vavilovskaya Yubileynaya were the most productive. The average yield of dry matter of these varieties reaches 8.4–9.2 t/ha, the maximum — 15.3–17.7 t/ha. Alfalfa varieties Timbale and Galaxy were the most productive among foreign varieties: the average yield of dry matter was 8.1 and 8.3 t/ha, the maximum – 15.5 and 17.2 t/ha. Varieties of alfalfa variable Vitalina and Vela provided an average yield of dry matter of 7.6 and 9.0 t/ha, the maximum yield reached 15.4 and 18.1 t/ha.

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