[ fermer ]

Partager cette page avec un ami

Votre nom :
Votre prénom* :
Votre email* :
Email du destinataire* :
Votre message :
* Champs obligatoires

Soil nitrogen depletion by vegetable crops with variable root growth

Author(s) : Sorensen JN., Thorup-kristensen K.
Date : Oct, 1999
Source(s) : Acta Agriculturae Scandinavica Section B-Soil And Plant Science #49:2 p92-97
Adresse : THORUP-KRISTENSEN K,DANISH INST AGR SCI,DEPT FRUIT VEGETABLE & FOOD SCI;POB 102;DK-5792 AARSLEV, DENMARK.

The ability of carrot, leek and white cabbage to deplete the soil inorganic nitrogen (N) pool was studied. All three crops are late-harvested crops with a long growing season, but they have been found to have very different root growth. At their optimal N supply, carrot left 27 kg nitrate-N/ha in the top 100 cm of the soil, leek left 87 kg N/ha and white cabbage left only 11 kg N/ha, in accordance with previously published differences in rooting depth among the three crops. Compared at a supply of 160 kg N/ha, 52, 65 and 4 kg nitrate-N/ha was left in the soil by carrot, leek and white cabbage respectively. Apart from an extensive root system, while cabbage also had a much higher N-uptake capacity than the two other crops. The significance of differences in root growth, N-uptake capacity and other factors in determining the ability of the three crops to deplete the soil inorganic N pool is discussed.

Source : Pubmed

 

Retour à la recherche

Actuellement : 14901 articles recencés En anglais

Espace réservé :

Mot de passe oublié ?