Variation of chickpea nodulation in a Mediterranean agroecosystem: relationship with soil characteristics and thresholds for significant contribution to plant growth
Laen...
Kuupäev
2021
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
This study was designed to investigate the influence of some environmental constraints
on chickpea (Cicer arietinum L.) growth and nodulation in a reference agroecosystem. This
multi-local field experiment, realized in the agroecosystem of Chlef in northern Algeria, involved
24 sites where the local well-adapted genotype Ain temouchent is grown. Determination of soil
properties allowed the identification of three clusters of sites. Plant biomass (SDW) varied
significantly among sites from 6.7 to 39.4 g SDW plant
-1
and was highly correlated with nodule
biomass (NDW). The slope of the regression function between NDW and SDW, defined as the
efficiency in use of the rhizobial symbiosis (EURS) inside clusters ranged from 67 to
200 g SDW g-1 NDW. Analysis of the EURS highlighted the existence of a low nodulation
threshold of 0.1 g NDW plant-1 below which the contribution of nodulation to the host plant
growth was not significant and a high threshold above which the nodule biomass increase was
not linked with an increase in shoot biomass. Thus, the significant regression of shoot growth as
a function of nodulation ranged from 0.10 to 0.35 g NDW plant-1
(R
2 = 0.54, P < 0.001).
Moreover, nodule biomass was positively correlated with soil Olsen-P, more particularly in
cluster A (R
2 = 0.50, P < 0.05) and B (R
2 = 0.61, P < 0.01). This approach proved to be a rapid
and efficient way to identify the major factors affecting nodulation in order to develop strategies
to optimize nodule contribution to chickpea growth and yield.
Kirjeldus
Received: January 19th, 2021 ; Accepted: February 28th, 2021 ; Published: March 22nd, 2021 ; Correspondence: cheneneyacine@gmail.com
Märksõnad
chickpea, efficiency in use of the rhizobial symbiosis, nodulation, phosphorus, plantsoil interaction, symbiotic nitrogen fixation, articles