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  • Agrostis tenuis  (1)
  • Dactylis glomerata  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Nitrogen accumulation in Kaolin wastes in Cornwall (1981)
    Springer
    Plant and soil 62 (1981), S. 439-451 
    Details
    ISSN: 1573-5036
    Keywords: Agrostis tenuis ; Ammonification ; China clay waster ; Festuca rubra ; Nitrification ; Nitrogen mineralisation ; Reclamation ; Trifolium repens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Nitrogen accumulation and nitrogen mineralisation rates were measured in a series of waste heaps, produced by the china clay mining industry, which had been reclaimed at different times with a sward ofAgrostis tenuis, Festuca rubra, andTrifolium repens. The best swards tended to have high ammonification rates and rapid N turnover (which is represented by a nitrogen turnover index) —nitrification rates or nitrogen accumulation were not such good predictors of sward quality. Ammonification increased with pH and with organic nitrogen accumulation whereas N turnover was not related to these factors. Nitrification levels were generally low and it was concluded that nitrification was not important to sward health. Organic nitrogen increased with age in all swards, ammonification in certain types only and nitrification not at all. Levels of all are well short of those in adjacent grazing land. Rates of turnover had however a tendency to decline towards those in the grazings owing probably to the build up of resistant humus. The proportion of the total nitrogen which is in the biomass (30%) is also higher than in adjacent grazings (6%). Rapid nitrogen cycling is thus needed to maintain productivity and greenness, and the disadvantages of this are discussed. The adequacy of nitrogen cycle development to date is considered, and possible future strategies outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374140
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  • 2
    Electronic Resource
    Electronic Resource
    Heritability of NaCl tolerance at the seedling stage in seven grass species (1986)
    Springer
    Euphytica 35 (1986), S. 935-940 
    Details
    ISSN: 1573-5060
    Keywords: Lolium perenne ; Dactylis glomerata ; Agrostis stolonifera ; Agrostis castellana ; Holcus lanatus ; Festuca rubra ; Pucinellia distans ; heritability ; NaCl tolerance ; salinity ; breeding ; selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Narrow sense heritabilities of tolerance to NaCl were estimated in seven grass species using seedling root length after three weeks growth in solution culture containing NaCl. Heritability estimates were obtained from i) female parent-progeny regression, and from ii) selection response and selection differential (realized heritability). Estimates from parent-progeny regression; and realized heritability respectively for each species were as follows Lolium perence L. 0.44, 0.39; Dactylis glomerata L. 0.32, 0.24; Agrostis stolonifera L. 0.28, 0.27; A. castellana L. 0.26; 0.31; Holcus lanatus L. 0.19, 0.23; Festuca rubra L. 0.44, 0.36; Pucinnellia distans (L.) Parl. 0.72, 0.77. These data suggest that in all species except perhaps H. lanatus, improvement in seedling NaCl tolerance could be obtained through further selection and breeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028602
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    Paper (German National Licenses)
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