Nitrogen uptake and its efficiency in triticale (Triticosecale Witt.) _ field beans (Vicia faba var. minor L.) intercrop
Sobkowicz, P.(Agricultural Univ., Wroclaw (Poland). Dept. of Soil Management and Plant Cultivation)E-mail:sobko@ozi.ar.wroc.pl | Sniady, R.(Agricultural Univ., Wroclaw (Poland). Dept. of Soil Management and Plant Cultivation)
A field experiment of split-plot design was conducted in 1999 and 2000 on light soil to study the effect of different levels of mineral nitrogen fertilization: 0, 25 and 50 kg N/ha on dry matter yield, N uptake and N efficiency indices of spring triticale and field beans grown in pure stands and in intercropping (with half of the seeding densities from pure stands). When grown in intercropping, the protein concentration increased in grain and biomass of triticale irrespective of N input. Increasing N rate from 0 to 25 kg/ha enhanced plant biomass yield of triticale and intercrop. The N uptake by crops in intercropping systems was significantly higher than that by sole crops. The higher the N fertilizer rate, the lower the gain from intercropping. This was due mainly by higher suppression of field beans by triticale. Agronomic efficiency was similar for triticale as well as for the intercropping system, but it was significantly smaller for field beans indicating there were other limited resources hampering the growth of this legume.
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