scholarly journals Nutrient storage in roots and rhizomes of hexaploid Caucasian clover

1994 ◽  
pp. 97-99
Author(s):  
D.E. Strachan ◽  
A.H. Nordmeyer ◽  
J.G.H. White
Keyword(s):  
Acid Soil ◽  
Nutrient Storage ◽  
Coarse Roots ◽  
Trifolium Ambiguum

Hexaploid Trifolium ambiguum M. Bieb. (Caucasian clover cv. Prairie) persisted and dominated in high country plots which received more than 100 kg P/ha at establishment. After 13 years the biomass of coarse roots (rhizomes and tap-roots) amounted to 20 t/ha. The contents of nutrients in the root fractions were approximately five times that in the herbage. This ability to retain nutrients in coarse roots may be a strategy that contributes to the dominance of Caucasian clover on this acid soil. Keywords: nutrients, phosphorus, roots, Trifolium ambiguum

Perennial legumes for the high rainfall zone of eastern Australia. 1. Evaluation in single rows and selection of Caucasian clover (Trifolium ambiguum M. Bieb.)

1996 ◽  
Vol 36 (2) ◽  
pp. 151 ◽  
Author(s):  
MJ Hill ◽  
C Mulcahy ◽  
GG Rapp
Keyword(s):  
Acid Soil ◽  
Germplasm Collection ◽  
Field Trials ◽  
Lespedeza Cuneata ◽  
Seedling Vigour ◽  
Trifolium Ambiguum ◽  
Eastern Australia ◽  
Astragalus Cicer ◽  
Glasshouse Screening ◽  
Perennial Legume

A range of perennial legume species, including Trifolium ambiguum, T medium, Astragalus cicer, Coronilla varia, Lotus corniculatus, L. pedunculatus, and Lespedeza cuneata, were evaluated in glasshouse and field trials in 1989-92 at Armidale, New South Wales. Hexaploid germplasm of T. ambiguum was subjected to selection for increased seedling vigour, early biomass production and profuse flowering in glasshouse screening and spaced plant field nurseries. On an acid, solodic soil, T. ambiguum and T. medium grew modestly, Lotus spp. grew vigorously initially, but died out within 3 years, A. cicer and C. varia failed to persist beyond 1 year, but isolated plants of Lespedeza cuneata thrived. On an acid, freedraining, red-basalt soil, all accessions grew vigorously until early 1991. During the succeeding drought, Lotus sp. died out, A. cicer thinned out on the acid soil, but T. ambiguum, T medium, and C. varia remained persistent and productive. A large nursery of A. cicer accessions on the same soil limed to 5 t/ha before planting remained vigorous to the present. Superior hexaploid material of T ambiguum selected from spaced plants, originated chiefly from CPI 43909 and the ARS-2678 germplasm collection from Utah, USA.

Genetic variation for rate of establishment in caucasian clover

1998 ◽  
pp. 213-217
Author(s):  
K.H. Widdup ◽  
T.L. Knight ◽  
C.J. Waters
Keyword(s):  
Genetic Variation ◽  
Root Growth ◽  
Seedling Growth ◽  
White Clover ◽  
Seedling Emergence ◽  
Red Clover ◽  
Dry Weight ◽  
Cool Season ◽  
Trifolium Ambiguum ◽  
Root Dry Weight

Slow establishment of caucasian clover (Trifolium ambiguum L.) is hindering the use of this legume in pasture mixtures. Improved genetic material is one strategy of correcting the problem. Newly harvested seed of hexaploid caucasian clover germplasm covering a range of origins, together with white and red clover and lucerne, were sown in 1 m rows in a Wakanui soil at Lincoln in November 1995. After 21 days, the caucasian clover material as a group had similar numbers of emerged seedlings as white clover and lucerne, but was inferior to red clover. There was wide variation among caucasian clover lines (48-70% seedling emergence), with the cool-season selection from cv. Monaro ranked the highest. Recurrent selection at low temperatures could be used to select material with improved rates of seedling emergence. Red clover and lucerne seedlings produced significantly greater shoot and root dry weight than caucasian and white clover seedlings. Initially, caucasian clover seedlings partitioned 1:1 shoot to root dry weight compared with 3:1 for white clover. After 2 months, caucasian clover seedlings had similar shoot growth but 3 times the root growth of white clover. Between 2 and 5 months, caucasian clover partitioned more to root and rhizome growth, resulting in a 0.3:1 shoot:root ratio compared with 2:1 for white clover. Both clover species had similar total dry weight after 5 months. Unhindered root/ rhizome devel-opment is very important to hasten the establishment phase of caucasian clover. The caucasian clover lines KZ3 and cool-season, both selections from Monaro, developed seedlings with greater shoot and root growth than cv. Monaro. KZ3 continued to produce greater root growth after 5 months, indicating the genetic potential for improvement in seedling growth rate. Different pasture estab-lishment techniques are proposed that take account of the seedling growth characteristics of caucasian clover. Keywords: establishment, genetic variation, growth, seedling emergence, Trifolium ambiguum

Responses of Sunflower Genotypes to Aluminum in Acid Soil and Nutrient Solution 1

1974 ◽  
Vol 66 (2) ◽  
pp. 293-296 ◽  
Author(s):  
C. D. Foy ◽  
R. G. Orellana ◽  
J. W. Schwartz ◽  
A. L. Fleming
Keyword(s):  
Nutrient Solution ◽  
Acid Soil

The influence of lime application to the acid soil on bioavailability of phosphorus in runoff

1996 ◽  
Vol 33 (4-5) ◽  
pp. 297-301 ◽  
Author(s):  
Vít Sova
Keyword(s):  
Acid Soil ◽  
Simulated Rainfall ◽  
Laboratory Conditions ◽  
Lime Application ◽  
Runoff Sediment

The influence of lime application to the acid soil on the mobility of phosphorus (P) in runoff was investigated by simulated rainfall in laboratory conditions. The neutralization of the acid soil by appropriate amount of lime significantly increased the portion of loosely bound phosphates in runoff sediment This phenomenon influenced bioavailability of P in runoff which increased after the lime application.

Cropping diversity with rice influences soil aggregate formation and nutrient storage under different tillage systems

2020 ◽  
Author(s):  
Mohammad M. R. Jahangir ◽  
Muhammad Jahiruddin ◽  
Hasina Akter ◽  
Rahana Pervin ◽  
Khandakar Rafiq Islam
Keyword(s):  
Soil Aggregate ◽  
Aggregate Formation ◽  
Nutrient Storage ◽  
Tillage Systems
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