ISSN:
1573-5036
Keywords:
basaltic soils
;
DRIS
;
perennial ryegrass
;
phosphorus recommendations
;
soil P test
;
soil type
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Perennial ryegrass is the most important species of forage grass in both continental Europe and the British Isles. An investigation was carried out to see if the DRIS model developed for this species was able to diagnose crop nutrient sufficiency status, at harvest time, using data for herbage samples collected 2 weeks earlier. A re-evaluation of P fertiliser recommendations for silage, based on the ‘Olsen’ soil P-test, was then carried out using DRIS diagnoses of P sufficiency status as the criteria with which to judge if swards had been adequately, under, or over-supplied with fertiliser P. The results confirmed that reliable (DRIS) diagnoses of N, P, K and S sufficiency statuses of silage swards may be made from herbage clippings taken 2 weeks prior to harvest. Current P recommendations for silage swards proved to be excessive for non-basaltic sandy textured soils at first cut, correct for this group of soils at second cut, and more or less correct for non-basaltic clay textured soils at both cuts. For basaltic soils, however, P recommendations at both cuts appeared to be unrelated to plant P status, and it was concluded that the ‘Olsen’ soil P-test had provided an erroneous assessment of plant available P in these exceptionally iron-rich soils.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004827206618
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