PHOSPHORUS APPLICATION IMPROVES THE PERFORMANCE OF SALT-STRESSED PHASEOLUS VULGARIS PLANTS

Document Type : Research articles.

Authors

Botany Department, Faculty of Agriculture, Fayoum University, Fayoum

Abstract

This study aimed to assess the impact of calcium superphosphate (P; 0,
100, and 200 kg per feddan) as soil amendments on the growth traits, green
and dry yields characteristics, leaf photosynthetic pigments, chlorophyll
fluorescence, and leaf contents of nutrients of common bean (Phaseolus
vulgaris L., cv. “Bronco”) plants grown under saline soil conditions. Two field
trials were conducted at the Experimental Farm of Faculty of Agriculture,
Fayoum University during the 2016 and 2017 summer seasons. The obtained
results showed that, Na+ content was significantly declined, while the all other
tested parameters such as growth characteristics (i.e., shoot length, number of
leaves per plant, area of leaves per plant, and shoot fresh and dry weights),
yield characteristics of green pods and dry seeds (i.e., average pod weight,
number of pods per plant, pods weight per plant, dry seed weight per plant and
100-seed weight), leaf photosynthetic pigments (i.e., total chlorophylls, total
carotenoids) contents and leaf chlorophyll fluorescence (i.e., Fv/Fm and PI),
leaf contents of N, P, K+, and Ca2+, and the ratios of K+/Na+, Ca2+/Na+ and
K++Ca2+/Na+ were significantly increased by the two tested P treatments
compared to the controls (the Ministry of Agriculture recommended P). The
all tested treatments conferred, approximately, the same results. Therefore,
results of this study recommend using P at the rate of 100 kg per feddan in
addition to the recommended dose to optimize the common bean performance
in saline soils.

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