Manure and soil properties affect survival and persistence of soyabean nodulating rhizobia in smallholder soils of Zimbabwe

R. Zengeni, S. Mpepereki, K.E. Giller

Research output: Contribution to journalArticleAcademicpeer-review

24 Citations (Scopus)

Abstract

Persistence of the soyabean rhizobial inoculant strain MAR 1491 was assessed in 52 soils from Guruve, Hurungwe and Goromonzi districts of Zimbabwe, which had been inoculated 1¿4 or 6 years previously. Most probable number estimates of rhizobia in the soils showed that population sizes decreased with increasing time since the last inoculation. Rhizobial populations of up to 102 cells g¿1 soil were found in Guruve soils inoculated 3 years before, while persistence in Hurungwe and Goromonzi soils was significant for soils inoculated 2 years before. The greater rhizobial persistence in Guruve soils was attributed to their higher clay (>20%) and organic C (>1%) compared with the sandier, relatively less fertile Hurungwe and Goromonzi soils. Farmers with favourable soils such as those in Guruve can grow soyabean for at least 3 years without the need for repeat inoculation. Manure application led to increased indigenous rhizobial numbers at two smallholder sites and larger numbers of rhizobia in inoculated plots in sandy soils from Goromonzi. Inoculation and manure addition increased rhizobial numbers and soyabean yields in field experiments; soyabean yields varied from 0.5 t ha¿1 in uninoculated, unmanured plots to 1.1 t ha¿1 in inoculated plots receiving 10 t manure ha¿1. Increases in numbers closely followed the progress of the wet season. The highest rhizobial population of 105 cells g¿1 soil was obtained in plots that had received 10 t ha¿1 manure when a high soil moisture (15%, w/w) was recorded during the cropping season, while the lowest population of 101 cells g¿1 soil was recorded in treatments during the dry season when soil moisture was low (
Original languageEnglish
Pages (from-to)232-242
JournalApplied Soil Ecology
Volume32
Issue number2
DOIs
Publication statusPublished - 2006

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Zimbabwe
Rhizobium
Manure
smallholder
rhizobacterium
manure
soil properties
soil property
Soil
persistence
soybeans
soil
inoculation
soil moisture
soil water
Population
cells
wet season
sandy soil
sandy soils

Keywords

  • nitrogen-fixation
  • populations
  • growth

Cite this

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title = "Manure and soil properties affect survival and persistence of soyabean nodulating rhizobia in smallholder soils of Zimbabwe",
abstract = "Persistence of the soyabean rhizobial inoculant strain MAR 1491 was assessed in 52 soils from Guruve, Hurungwe and Goromonzi districts of Zimbabwe, which had been inoculated 1¿4 or 6 years previously. Most probable number estimates of rhizobia in the soils showed that population sizes decreased with increasing time since the last inoculation. Rhizobial populations of up to 102 cells g¿1 soil were found in Guruve soils inoculated 3 years before, while persistence in Hurungwe and Goromonzi soils was significant for soils inoculated 2 years before. The greater rhizobial persistence in Guruve soils was attributed to their higher clay (>20{\%}) and organic C (>1{\%}) compared with the sandier, relatively less fertile Hurungwe and Goromonzi soils. Farmers with favourable soils such as those in Guruve can grow soyabean for at least 3 years without the need for repeat inoculation. Manure application led to increased indigenous rhizobial numbers at two smallholder sites and larger numbers of rhizobia in inoculated plots in sandy soils from Goromonzi. Inoculation and manure addition increased rhizobial numbers and soyabean yields in field experiments; soyabean yields varied from 0.5 t ha¿1 in uninoculated, unmanured plots to 1.1 t ha¿1 in inoculated plots receiving 10 t manure ha¿1. Increases in numbers closely followed the progress of the wet season. The highest rhizobial population of 105 cells g¿1 soil was obtained in plots that had received 10 t ha¿1 manure when a high soil moisture (15{\%}, w/w) was recorded during the cropping season, while the lowest population of 101 cells g¿1 soil was recorded in treatments during the dry season when soil moisture was low (",
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journal = "Applied Soil Ecology",
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Manure and soil properties affect survival and persistence of soyabean nodulating rhizobia in smallholder soils of Zimbabwe. / Zengeni, R.; Mpepereki, S.; Giller, K.E.

In: Applied Soil Ecology, Vol. 32, No. 2, 2006, p. 232-242.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Manure and soil properties affect survival and persistence of soyabean nodulating rhizobia in smallholder soils of Zimbabwe

AU - Zengeni, R.

AU - Mpepereki, S.

AU - Giller, K.E.

PY - 2006

Y1 - 2006

N2 - Persistence of the soyabean rhizobial inoculant strain MAR 1491 was assessed in 52 soils from Guruve, Hurungwe and Goromonzi districts of Zimbabwe, which had been inoculated 1¿4 or 6 years previously. Most probable number estimates of rhizobia in the soils showed that population sizes decreased with increasing time since the last inoculation. Rhizobial populations of up to 102 cells g¿1 soil were found in Guruve soils inoculated 3 years before, while persistence in Hurungwe and Goromonzi soils was significant for soils inoculated 2 years before. The greater rhizobial persistence in Guruve soils was attributed to their higher clay (>20%) and organic C (>1%) compared with the sandier, relatively less fertile Hurungwe and Goromonzi soils. Farmers with favourable soils such as those in Guruve can grow soyabean for at least 3 years without the need for repeat inoculation. Manure application led to increased indigenous rhizobial numbers at two smallholder sites and larger numbers of rhizobia in inoculated plots in sandy soils from Goromonzi. Inoculation and manure addition increased rhizobial numbers and soyabean yields in field experiments; soyabean yields varied from 0.5 t ha¿1 in uninoculated, unmanured plots to 1.1 t ha¿1 in inoculated plots receiving 10 t manure ha¿1. Increases in numbers closely followed the progress of the wet season. The highest rhizobial population of 105 cells g¿1 soil was obtained in plots that had received 10 t ha¿1 manure when a high soil moisture (15%, w/w) was recorded during the cropping season, while the lowest population of 101 cells g¿1 soil was recorded in treatments during the dry season when soil moisture was low (

AB - Persistence of the soyabean rhizobial inoculant strain MAR 1491 was assessed in 52 soils from Guruve, Hurungwe and Goromonzi districts of Zimbabwe, which had been inoculated 1¿4 or 6 years previously. Most probable number estimates of rhizobia in the soils showed that population sizes decreased with increasing time since the last inoculation. Rhizobial populations of up to 102 cells g¿1 soil were found in Guruve soils inoculated 3 years before, while persistence in Hurungwe and Goromonzi soils was significant for soils inoculated 2 years before. The greater rhizobial persistence in Guruve soils was attributed to their higher clay (>20%) and organic C (>1%) compared with the sandier, relatively less fertile Hurungwe and Goromonzi soils. Farmers with favourable soils such as those in Guruve can grow soyabean for at least 3 years without the need for repeat inoculation. Manure application led to increased indigenous rhizobial numbers at two smallholder sites and larger numbers of rhizobia in inoculated plots in sandy soils from Goromonzi. Inoculation and manure addition increased rhizobial numbers and soyabean yields in field experiments; soyabean yields varied from 0.5 t ha¿1 in uninoculated, unmanured plots to 1.1 t ha¿1 in inoculated plots receiving 10 t manure ha¿1. Increases in numbers closely followed the progress of the wet season. The highest rhizobial population of 105 cells g¿1 soil was obtained in plots that had received 10 t ha¿1 manure when a high soil moisture (15%, w/w) was recorded during the cropping season, while the lowest population of 101 cells g¿1 soil was recorded in treatments during the dry season when soil moisture was low (

KW - nitrogen-fixation

KW - populations

KW - growth

U2 - 10.1016/j.apsoil.2005.06.001

DO - 10.1016/j.apsoil.2005.06.001

M3 - Article

VL - 32

SP - 232

EP - 242

JO - Applied Soil Ecology

JF - Applied Soil Ecology

SN - 0929-1393

IS - 2

ER -