Influence of subsoil zinc on dry matter production, seed yield and distribution of zinc in oilseed rape genotypes differing in zinc efficiency
作者： Harsharn Singh Grewal , Lu Zhonggu , Robin D Graham
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摘要: The effects of Zn supply (+Zn: 1 mg kg−1 soil, -Zn: no added) in subsoil were examined three genotypes Brassica napus (Zhongyou 821, Xinza 2, Narendra) and one genotype juncea (CSIRO-1) a glasshouse experiment pots (100 cm long, 10.5 diameter). topsoil (upper 20 soil pots) was supplied with all treatments whereas either or omitted from the subsoil. Supplying to significantly increased root growth lower zone, markedly decreased number aborted unfilled pods plant−1 developed plant−1, seeds pod−1, individual seed weight overall yield. Subsoil also concentration content improved ratio uptake by total shoots. These more pronounced Zhongyou 2 Narendra compared CSIRO-1. CSIRO-I had 92% efficiency (ratio -Zn yield +Zn expressed percentage) 63% for 821. Among four genotypes, CSIRO-1 lowest roots shoots but highest seed, suggesting it has superior transport mechanism source (roots) sink (seed). rhizosphere pH rooting zone (20-93 cm) treatment treatment.
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