Author: TAE-HWAN.. KIM Publisher: ISBN: Category : Languages : fr Pages :
Book Description
LES EFFETS D'UNE COUPE DES PARTIES AERIENNES SUR LE METABOLISME AZOTE DE MEDICAGO SATIVA L., CV EUROPE SONT ETUDIES. UN MARQUAGE DE CHASSE #1#5N PREALABLEMENT A LA COUPE PERMET D'ESTIMER L'ORIGINE DE L'AZOTE DES ORGANES EN REPOUSSE EN PRECISANT LA CONTRIBUTION DE L'AZOTE ENDOGENE (RESERVES) ET EXOGENE (N PRELEVE DANS LE MILIEU OU N#2 ATMOSPHERIQUE). LA COUPE MODIFIE LES RELATIONS SOURCE/PUITS POUR L'AZOTE DE RESERVE. DURANT LES 10 PREMIERS JOURS DE REPOUSSE, L'ESSENTIEL DE L'AZOTE DE L'APPAREIL AERIEN PROVIENT DE LA MOBILISATION DES RESERVES AZOTEES STOCKEES ESSENTIELLEMENT DANS LES RACINES LATERALES ET LE PIVOT RACINAIRE SOUS FORME DE PROTEINES ET D'ACIDES AMINES. CETTE PREMIERE PERIODE SE CARACTERISE NOTAMMENT PAR UNE REDUCTION I) DE LA FIXATION SYMBIOTIQUE, II) DE L'ABSORPTION D'AZOTE MINERAL ET III) DES QUANTITES D'AMIDON DANS LE PIVOT. AU-DELA DU 11EME JOUR, LA MOBILISATION DES RESERVES AZOTEES S'ACHEVE ALORS QUE LA REPRISE DE L'ABSORPTION DE NH#4NO#3 ET DE LA FIXATION DE N#2 PERMET D'ASSURER LES BESOINS EN AZOTE DE L'APPAREIL FOLIAIRE ET LA RECONSTITUTION DES RESERVES AZOTEES RACINAIRES. L'ESTIMATION DE LA DYNAMIQUE DE REPOUSSE ET DE L'UTILISATION DES RESERVES, CHEZ DES PLANTES PRESENTANT EN DEBUT DE REPOUSSES DES QUANTITES VARIABLES DE RESERVES EN AZOTE ET EN AMIDON, MONTRENT CLAIREMENT QUE LE NIVEAU INITIAL DE RESERVE EN AZOTE, CONDITIONNE TOTALEMENT LA PRODUCTION FINALE DE BIOMASSE ET L'ABSORPTION D'AZOTE MINERAL DU MILIEU, CONTRAIREMENT AUX RESERVES EN AMIDON QUI NE SEMBLENT PAS LIMITANTES. DURANT LES 10 PREMIERS JOURS DE REPOUSSE, LA TENEUR EN ACIDES AMINES DE LA SEVE XYLEMIQUE DIMINUE DE 72% ET 82% RESPECTIVEMENT CHEZ DES PLANTES ALIMENTEES EXCLUSIVEMENT AVEC NH#4NO#3 OU N#2. L'ASPARAGINE REPRESENTE LA FORME ESSENTIELLE DE TRANSPORT DE L'AZOTE REDUIT VERS LES PARTIES AERIENNES QUE CELUI-CI PROVIENNE DE LA MOBILISATION DES RESERVES, DE L'ABSORPTION DE NH#4NO#3 OU ENCORE DE LA FIXATION SYMBIOTIQUE DE N#2
Book Description
Les effets de la réduction de i) l'alimentation azotée, de ii) la hauteur de coupe, et de iii) la surface foliaire résiduelle, ont été suivis, notamment au travers d'un modèle mécaniste quantitatif, sur la dynamique de l'azote (et du carbone) ainsi que sur la production lors de la repousse chez la luzerne. Le niveau des réserves azotées initiales est prépondérant vis-à-vis de la production finale. Le modèle suggère que ce rôle déterminant passe par une offre accrue en azote vers les parties aériennes en croissance pendant les 9 premiers jours de la repousse. La seconde variable explicative est ensuite représentée par la hauteur de coupe. Enfin, il apparaît que la surface foliaire résiduelle n'ait un effet significatif que lorsque les feuilles des chaumes sont remises dans des conditions de fort éclairement après la coupe. L'ensemble de ces résultats montre que la luzerne optimise sa production au travers d'une gestion dynamique de l'utilisation et du recyclage de l'azote.
Author: P. N. de Leeuw Publisher: ILRI (aka ILCA and ILRAD) ISBN: 9290532793 Category : Fallow land plants Languages : en Pages : 323
Book Description
The biology of Stylosanthes and its importance in West Africa and Latin America; The screening and evaluation of Stylosanthes germplasm; The dynamics, nutrient requirements, pests and diseases of Stylosanthes species; Stylosanthes-based pastures for livestock production; The integration of Stylosanthes into cropping systems; Seed production of Stylosanthes.
Author: Paul-André Calatayud Publisher: IRD Editions ISBN: 9782709916141 Category : Cassava Languages : en Pages : 116
Book Description
Most basic information on plant-mealybug interactions during the last decade has come from research on the cassava Manihot esculenta Crantz (Euphorbiaceae) system with two mealybug species, namely Phenacoccus manihoti Matile-Ferrero and Phenacoccus herreni Cox and Williams (Sternorrhyncha: Pseudococcidae). Both these insects cause severe damage to cassava in Africa and South America, respectively. This book reviews these interactions (plant selection by the insects, nutritional requirements
Author: G. Steven Sibbett Publisher: UCANR Publications ISBN: 9781879906143 Category : Technology & Engineering Languages : en Pages : 190
Book Description
This bestselling manual is the definitive guide to olive production in California. This 180-page manual is fully illustrated with 40 tables, 19 line drawings, and 36 charts, and 100 color and black and white photos. The most notable additions to this edition include a new chapter on deficit irrigation, a greatly expanded chapter on olive oil production, and coverage of four new pests, including the olive fly. Includes production techniques for commercial growers worldwide - from orchard planning and maintenance to harvesting and postharvest processing. Contains information on pollination, pruning for shaker and vertical rotating comb harvest, mechanical pruning, deficit irrigation, mechanical harvesting methods including trunk-shaking and canopy contact harvesters, postharvest handling and processing methods, and olive oil production. Also includes information on new pests including olive fly, oleander scale, olive mite, and black vine weevil.
Author: Jean-Philippe Chippaux Publisher: Krieger Publishing Company ISBN: 9781575242729 Category : Antivenins Languages : en Pages : 0
Book Description
Presenting a synthesis of the principal discoveries on venoms and envenomations, this text describes the paleontology and classification of snakes as well as the biochemistry and toxicology of venoms to explain the theoretical basis of the envenomation and its treatment.
Author: Kalliopi A. Roubelakis-Angelakis Publisher: Springer Science & Business Media ISBN: 9401723087 Category : Science Languages : en Pages : 486
Book Description
Grapevine is one of the major cultivated plant crops. As with most woody plant species, molecular biology and biotechnology have progressed at a slow pace, due to several obstacles which have had to be overcome. However, substantial progress has now been made and useful information has been accumulated in the literature; numerous genes have been characterized from grapevine and significant progress has been made in the molecular and non-molecular biotechnological applications. In an effort to collect and present the state of the art on grapevine molecular biology and biotechnology, 41 scientists from 12 countries worked jointly on the preparation of this book. It is intended as a reference book for viticulturists, graduate and undergraduate students, biotechnological companies, and any scientist who is interested in molecular biology and biotechnology of plants with emphasis on grapevine.
Author: Joseph Jez Publisher: ASA-CSSA-SSSA ISBN: 9780891181682 Category : Science Languages : en Pages : 362
Book Description
Sulfur forms and cycling processes in soil and their relationship to sulfur fertility / Jeff J. Schoenau and Sukhdev S. Malhi -- Sulfur nutrition of crops in the Indo-Gangetic plains of South Asia / M.P.S. Khurana, U.S. Sandana and Bijay-Singh -- Soil sulfur cycling temperate agricultural systems / Jørgen Eriksen -- History of sulfur deficiency in crops / Silvia Haneklaus, Elke Bloem and Ewald Schnug -- Availability of sulfur to crops from soil and other sources / Warren A. Dick, David Kost and Liming Chen -- Sulfur and cysteine metabolism / Rainer Hoefgen and Holger Hesse -- Sulfur response based on crop, source, and landscape position / Dave Franzen and Cynthia A. Grant -- Sulfur management for soybean production / Kiyoko Hitsuda [and others] -- Sulfur in a fertilizer program for corn / George W. Rehm and John G. Clapp -- Sulfur nutrition and wheat quality / Hamid A. Naeem -- Sulfur and marketable yield of potato / Alexander D. Pavlista -- Sulfur, its role in onion production and related alliums / George E. Boyhan -- Sulfur and the production of rice in wetland and dryland ecosystems / Richard W. Bell -- Evaluation of the relative significance of sulfur and other essential mineral elements in oilseed rape, cereals, and sugar beet production / Ewald Schnug and Silvia Haneklaus -- Improving the sulfur-containing amino acids of soybean to enhance its nutritional value in animal feed / Hari B. Krishnan -- Methionine metabolism in plants / Rachel Amir and Yael Hacham -- Plant sulfur compounds and human health / Joseph M. Jez and Naomi K. Fukagawa -- A future crop biotechnology view of sulfur and selenium / Muhammad Sayyar Khan and Rüdiger Hell.
Author: Bijay K. Singh Publisher: CRC Press ISBN: 1482270064 Category : Medical Languages : en Pages : 636
Book Description
Covers the basic knowledge of the regulation of biosynthesis of various amino acids in plants and the application of this knowledge to the discovery of novel inhibitors of amino acid biosynthesis and for enhancing the nutritional value of plant products. Provides an exhaustive list of pathway inhibitors.
Author: TAE-HWAN.. KIM
Author: Frédéric Meuriot
Author: P. N. de Leeuw
Author: 
Author: Paul-André Calatayud
Author: G. Steven Sibbett
Author: Jean-Philippe Chippaux
Author: Kalliopi A. Roubelakis-Angelakis
Author: Joseph Jez
Author: Bijay K. Singh