Genotypic Variation for Residual Mineral Nitrogenin the Soil after Faba Bean and Pea Cultivation
Year: 2004
Type: article
Abstract: Grain legumes are protein rich break crops for cerealdominated rotations. The low stability of yield and the risk of residual nitrate leaching after their cultivation are well known. The aim of this study was to examine the correlations between grain yield or protein yield and the amount of mineral nitrogen (Nmin) left in the soil after harvest. Sixteen present-day cultivars of each faba bean and pea were studied across six environments (three locations in Germany in 1996 and 1997) at two N levels (0 kg ha–1, 200 kg ha–1). Hence, there were 12 test-conditions for a detailed investigation of genotype × test-condition interaction. Cultivars of both crops differed significantly for grain yield, protein concentration in grains, protein yield, and Nmin after harvest. N fertilisation significantly increased the Nmin values after both crops and also the protein concentration in grains and the protein yield for pea. For both grain legumes, negative correlations were detected between grain yield or protein yield and Nmin after harvest. Correlations were stronger with the N200 level. Genetic improvement of grain yield seems to be accompanied by a decrease of Nmin values after harvest. Moderate interactions between genotypes and test-conditions for all traits were verified in the experiments. Cultivars of both crops were separated into two groups. Conventional type faba bean cultivars expressed higher yields and left less Nmin after harvest than cultivars with deviating morphological properties. Semi-leafless pea cultivars showed higher yields with superior stability and smaller amounts of Nmin after harvest than normal-leaf pea cultivars. The AMMI (Additive Main effects and Multiplicative Interaction) analysis allowed for a visual inspection of the impact of the N fertilisation level on the Nmin interaction pattern genotypes × test-conditions.
Authors: H. Riemer, Wolfgang Link
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W2922788528