Abstract
In order to analyze the effectiveness of colonization by arbuscular mycorrhizal
fungi (AMF) at the nursery stage on the growth and nutrient concentration of
wetland rice after transplanting, the experiments were conducted under glasshouse conditions using two types of soil, namely (i) sterilized paddy soil (PS)
and (ii) sterilized paddy soil diluted with sterilized Andosol subsoil 5 times (DS)
under two water regimes, (i) flooded conditions changed to non-flooded conditions 30 d before harvest (F-NF) and (ii) continuous flooding (CF) up to harvest. Treatments consisting of mycorrhizal inoculation (+AMF) and non-inoculation (-AMF) were applied only at the nursery stage when the seedlings were produced under dry nursery (60% moisture of maximum water holding capacity) conditions.
Seedlings grown in PS showed a significantly higher biomass yield and
nutrient concentrations than in DS. At 90 and 105 d after transplanting, the
mycorrhizal plants showed a higher biomass than non-mycorrhizal plants in
PS whereas there were no differences in DS except for roots. Mycorrhizal
colonization at the transplanting stage was higher in DS than in PS. However,
after transplanting opposite results were obtained, the level in PS being
relatively higher than in DS. Grain yield and P concentration of unhulled grain
and shoots in PS were higher in the +AMF treatments than in the -AMF
treatments under both water regimes. Contents of micronutrients (Zn, Cu, Fe,
and Mn) were higher in the +AMF plants than in the -AMF ones at all growth stages up to maturation irrespective of soil fertility and water regimes.
These results suggest that AMF inoculation at the nursery-stage was beneficial
for wetland rice after transplanting to flooded conditions in terms of growth
promotion and increase of nutrient concentrations.
fungi (AMF) at the nursery stage on the growth and nutrient concentration of
wetland rice after transplanting, the experiments were conducted under glasshouse conditions using two types of soil, namely (i) sterilized paddy soil (PS)
and (ii) sterilized paddy soil diluted with sterilized Andosol subsoil 5 times (DS)
under two water regimes, (i) flooded conditions changed to non-flooded conditions 30 d before harvest (F-NF) and (ii) continuous flooding (CF) up to harvest. Treatments consisting of mycorrhizal inoculation (+AMF) and non-inoculation (-AMF) were applied only at the nursery stage when the seedlings were produced under dry nursery (60% moisture of maximum water holding capacity) conditions.
Seedlings grown in PS showed a significantly higher biomass yield and
nutrient concentrations than in DS. At 90 and 105 d after transplanting, the
mycorrhizal plants showed a higher biomass than non-mycorrhizal plants in
PS whereas there were no differences in DS except for roots. Mycorrhizal
colonization at the transplanting stage was higher in DS than in PS. However,
after transplanting opposite results were obtained, the level in PS being
relatively higher than in DS. Grain yield and P concentration of unhulled grain
and shoots in PS were higher in the +AMF treatments than in the -AMF
treatments under both water regimes. Contents of micronutrients (Zn, Cu, Fe,
and Mn) were higher in the +AMF plants than in the -AMF ones at all growth stages up to maturation irrespective of soil fertility and water regimes.
These results suggest that AMF inoculation at the nursery-stage was beneficial
for wetland rice after transplanting to flooded conditions in terms of growth
promotion and increase of nutrient concentrations.
| Original language | English |
|---|---|
| Pages (from-to) | 561-571 |
| Journal | Soil Science and Plant Nutrition |
| Volume | 42 |
| Issue number | 3 |
| Publication status | Published - 1996 |