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Does Lupinus angustifolius L. need sulfur fertilization under central European conditions?
Author(s) -
Pötzsch Frank,
Lux Guido,
Lewandowska Sylwia,
Schmidtke Knut
Publication year - 2019
Publication title -
journal of plant nutrition and soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 1436-8730
DOI - 10.1002/jpln.201800361
Subject(s) - lupinus angustifolius , sulfur , straw , human fertilization , gypsum , arable land , chemistry , yield (engineering) , nitrogen , agronomy , horticulture , botany , biology , paleontology , ecology , materials science , organic chemistry , metallurgy , agriculture
In order to answer the question of whether narrow‐leaf lupin ( Lupinus angustifolius L.) needs sulfur (S) fertilization under central European conditions, field trials were carried out at several sites in Germany on long‐term (> 10 years) organically cultivated arable land from 2012 to 2014. The effect of S‐containing fertilizers kieserite, gypsum, epsom salt, and elemental sulfur on S accumulation, yield, yield structure, and nitrogen (N) accumulation in narrow leaf lupin as well as the recovery of fertilized S was investigated. Under the given conditions, the fertilization did not influence seed yields. The S accumulation in shoots ranged from 11.8 kg ha −1 to 14.1 kg ha −1 . The bulk of the absorbed S was accumulated in the straw (average S harvest index: 0.40). The N : S ratio in the youngest open leaf at BBCH 60–65 was about 20 and the corresponding S concentration was 0.24% in the leaf dry mass. The apparent recovery efficiency of S (RE) of kieserite, gypsum, and epsom salt, whose S form is generally plant‐available, was low with 4.0%, –2.1%, and 6.6%, respectively. The S requirement of the lupin was obviously completely filled by plant‐available S from the soil as well as atmospheric S deposition in all tested environments. Application of kieserite, gypsum, and epsom salt resulted in a partially significant increase in S concentration of seeds and straw, and also partly significantly narrowed the N : S ratios in the plants but did not increase yield. Application of elemental S did not lead to an increase in plant S concentration in the year of application.