Farmyard manure application increases spikelet fertility and grain yield of lowland rice on phosphorus-deficient and cool-climate conditions in Madagascar highlands. (2nd October 2021)

• Record Type: Journal Article
• Authors: Asai, Hidetoshi; Rabenarivo, Michel; Andriamananjara, Andry; Tsujimoto, Yasuhiro; Nishigaki, Tomohiro; Takai, Toshiyuki; Rakotoson, Tovohery; Rakotoarisoa, Njato Mickaël; Razafimbelo, Tantely
• Is Part Of: Plant production science. Volume 24:Number 4(2021)
• Page Start: 481
• Page End: 489
• Publication Date: 2021-10-02
• Subjects: Soil P availability -- high altitude -- cold stress -- spikelet sterility -- oryza sativa l. -- plant P uptake; Plant products -- Periodicals; Field crops -- Periodicals; 571.2
• DOI: 10.1080/1343943X.2021.1908150
• Languages: English
• ISSNs: 1343-943X

Abstract

ABSTRACT: Phosphorus (P) deficiency is a major yield constraint for lowland rice production in the tropics. As P-fertilizer resources are finite, alternative fertilizer management is needed for sustainable rice production. We examined whether farmyard manure (FYM), a major nutrient source for smallholder farms, can overcome issue in typical P-deficient lowlands in the central highlands of Madagascar. A multi-location trial in sites varying in altitude and soil P availability, clarified that the effect of both FYM and mineral P fertilizer application on grain yield greatly increased at higher elevation and when the soil oxalate-extractable P content was <100 mg kg −1 . The yield increase was attributable to improved grain fertility, probably because FYM and mineral P applications decreased days to flowering and avoided low temperatures at late growth stages. Nutrient uptake assessment clarified that despite its relatively low P content, FYM had an equivalent effect on plant P uptake to those of mineral P fertilizer. We concluded that FYM application was effective in low-P availability soils at high altitude, as alternative of mineral P fertilizer. Further monitoring is required to assess the effect of consecutive FYM use on grain yield and plant nutrient uptake in the context of cold stress induced by P deficiency. Graphical Abstract: uf0001