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Einfluss der Aussaatdichte auf Gehalte und Aufnahme von N, P und K bei Lein ( Linum usitatissimum L.)
Author(s) -
Hassan F. U.,
Leitch M. H.
Publication year - 2000
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1046/j.1439-037x.2000.00427.x
Subject(s) - linum , maturity (psychological) , dry matter , seeding , crop , biology , zoology , agronomy , horticulture , botany , psychology , developmental psychology
Field experiments were conducted at the University of Wales, Aberystwyth, UK to evaluate the effects of seeding density and row spacing on the contents and uptake of N, P and K in linseed during 1993 and 1994. The contents of all three nutrients decreased with age of the plants up to the start of flowering, but N and P slightly increased at maturity in both the experiments. The increase of N and P at maturity could be the result of greater accumulation of these elements in the seeds. The uptake of all three elements (N, P and K) increased progressively with age of the plants, with a peak at maturity, but the level of K decreased by almost half in both experiments between flowering and maturity. The progressive increase of uptake with age of the plants may be related to total dry matter production. The decrease of K at maturity indicated that lower plant parts (stem and leaves) accumulated a higher percentage of K than seeds. The senescence of leaves at maturity might also have contributed to the decrease of K at maturity. The characteristics of the crop were in general quite similar in 1993 and 1994. The small variations found in the contents and uptake of N, P and K could be due to variation in weather conditions and the total length of the growth period. In 1993, the weather was moist and relatively cool, while in 1994 it was dry and relatively hot.