Influence of Different Levels of Phosphorus on the Effectiveness of Arbuscular Mycorrhizae in Rice Rhizosphere

Le résumé fourni par la source

Arbuscular Mycorrhyzae Fungal (AMF) spores were obtained through mass multiplication in maize (in a previous experiment) as a host crop. A study was conducted to test the effectiveness of AMF in rice as host, with three levels of P2O5 (0, 20 and 40 kg/ha) under submerged condition. By reducing levels of P2O5 to 50 % (20 kg/ha) comparable plant biomasses were recorded (P < 0.05) under AMF inoculation with that of highest level of P2O5 (40 kg/ha) with or without AMF inoculation. By reducing the P supply (20 kg/ha), measurable effect of mycorrhyzae (P < 0.05) was obtained for P and N concentration (1.27 and 7.88mg/g respectively) and their uptake (20.63 and 127.50 mg/plant respectively) in rice plants which were comparable with un-inoculated plants at 40 kg P2O5/ha. AMF spores and root colonization were found at all levels of P supply, although overall the numbers of mycorrhyzal spores and per cent root colonization decreased with increasing P under mycorrhyza inoculation which implies that saturation or inundation does not necessarily prevent the development of AMF association.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.