Caucasian clover as a pasture legume for dryland dairying in the coastal Bay of Plenty

Watson, R.N.; Neville, F.J.; Bell, N.L.; Harris, S.L.

doi:10.33584/jnzg.1996.58.2212

Cited by 26 publications

(33 citation statements)

References 11 publications

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“…Dinitrogen fixation values presented herein are the first reported estimates of seeding‐year N 2 fixation in kura clover. They are consistent with the report by Watson et al (1996) of almost nil dinitrogenase activity levels in kura clover nodules. Although kura clover N 2 fixation appears to be insignificant in the seeding year, Seguin et al (2000) reported postseeding year N 2 fixation levels to be similar to those of birdsfoot trefoil.…”

Section: Resultssupporting

confidence: 93%

“…Inoculation of kura clover in North America and New Zealand is recommended because few soils outside of its center of origin in the Caucasus contain effective indigenous rhizobia (Hely, 1957). Even when inoculated, there are indications that kura clover has very low N 2 fixation in the establishment year (Watson et al, 1996; Genrich et al, 1998); thus, its initial growth might be N limited. Patrick and Lowther (1995) reported a strong correlation between nodulation and establishment of kura clover.…”

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confidence: 99%

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Nitrogen Fertilization and Rhizobial Inoculation Effects on Kura Clover Growth

et al. 2001

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Kura clover (Trifolium ambiguum M.B.) is a persistent, rhizomatous forage legume; however, its use is currently limited by slow establishment. We determined the effects of rhizobial inoculation and N fertilization on kura clover growth and N2 fixation in the seeding year. Kura clover was seeded with or without a commercial rhizobial inoculant and with and without N fertilization in three environments. Fertilization treatments consisted of 100 kg N ha−1 either applied at seeding or split in 10 kg N ha−1 applications every other week after seeding. Nitrogen fertilization increased seeding‐year herbage accumulation in all locations, but the response to fertilizer N was greater on a loamy sand with low organic matter and available N than on a silt loam with high soil organic matter. Rhizobial inoculation failed to consistently improve seeding‐year herbage accumulation compared with no inoculation; a positive response was observed in only one of three environments. Dry matter accumulation responses of root and rhizome to N fertilization and rhizobial inoculation were similar to that of herbage. Dinitrogen fixation in the seeding year varied between 9 and 25 kg ha−1 fixed N, depending on the environment. Seeding‐year inoculation increased postseeding year herbage yield. Also, when a positive response to N fertilization occurred in the seeding year, the response was maintained in the postseeding year. A commercial rhizobial inoculant was ineffective in establishing adequate nodulation in the seeding year in a N‐limited soil, indicating the need to identify more effective rhizobia for kura clover.

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Section: Resultssupporting

confidence: 93%

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confidence: 99%

Nitrogen Fertilization and Rhizobial Inoculation Effects on Kura Clover Growth

et al. 2001

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“…1). GG numbers initially increased more rapidly in WC, probably reflecting greater pasture growth and clover content in year 1 (Watson et al 1996a), but also declined more rapidly in WC plots in year 4. This related to the loss of clover cover and more extreme soil temperatures during summer drought (Watson et al 1998).…”

Section: Results and Discussion Insect Pestsmentioning

confidence: 96%

“…The establishment and conduct of the trials has been described elsewhere (Watson et al 1996a;. Briefly, 0.125 hectare plots × 4 replicates each of cv.…”

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Pest populations during the first six years in ryegrass pastures containing white or Caucasian clover

Watson¹,

Bell²,

Neville³

et al. 2000

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Insect and nematode pests in ryegrass pasture with white (WC) or Caucasian clover (CC) were similar in species composition In droughtprone soil however WC abundance fluctuated markedly over six years whereas CC was more persistent Insect pest populations in autumn followed similar overall time trends in each clover though some fluctuated less markedly in CC probably due to greater clover abundance and pasture cover rather than food quality differences Whitefringed weevil increased to damaging levels in CC by the sixth year Clover cyst nematode populations were suppressed by CC but root knot nematode increased to greater abundance than in WC soil Root knot nematode and whitefringed weevil may provide the greatest pest threats to longterm productive potential and persistence of CC in northern areas of New Zealand

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Microbial pathogens and plant parasitic nematodes in pastures with declining vigour

Sarathchandra

Watson

Skipp

et al. 2000

New Zealand Journal of Agricultural Research

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Two years after establishment, areas of low vigour (LV) were noticed within a white clover (Trifolium repens)/ryegrass (Lolium perenne) pasture. These areas became progressively larger, and, two years later, the pasture had low vigour, comprising only 3% white clover. Clover tissue nitrogen and phosphorus levels were greater in high vigour (HV) than in LV herbage. There were no differences (P > 0.05) in "total" bacteria, fluorescent pseudomonads, or proportions of deleterious bacteria in LV and HV white clover roots (mean logio CFUs for total count and fluorescent pseudomonads were 9.4 and 8.8, respectively, and the proportions of deleterious bacteria encountered in these groups were 6.9% and 17.5%). There was a 9-fold difference (P < 0.01) in the white clover dry matter between LV areas and HV areas in February, increasing to 25-fold (P< 0.01) in March. The total dry matter yield differences, which included grasses and clover, were 2.7-and 2-fold (P < 0.01) for the two months. More fungi were isolated (P < 0.05) from LV white clover roots than from HV roots (164 and 104 isolates, respectively). This was mostly due to greater numbers (P < 0.01) of Codinaea fertilis in LV roots (111 cf. 41 in HV). In ryegrass roots, there were also greater numbers (P < 0.01 ) of total fungi in LV roots (97 cf. 50 total A00024 isolates in HV), mostly due to higher populations of Fusarium oxysporum in LV roots (29 isolates cf. 5 in HV). There was no difference (P > 0.05) in the Soil Pathogenicity Index between LV and HV soil. The plant parasitic nematode populations in 250 ml of soil in LV and HV areas were 42.7 and 9.7 for Heterodera and 28.1 and 3.9 for Meloidogyne, respectively.

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Caucasian clover as a pasture legume for dryland dairying in the coastal Bay of Plenty

Cited by 26 publications

References 11 publications

Nitrogen Fertilization and Rhizobial Inoculation Effects on Kura Clover Growth

Nitrogen Fertilization and Rhizobial Inoculation Effects on Kura Clover Growth

Pest populations during the first six years in ryegrass pastures containing white or Caucasian clover

Microbial pathogens and plant parasitic nematodes in pastures with declining vigour

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