Effect of subsoiling on tillers, root density and nitrogen use efficiency of winter wheat in loessal soil

Guohua Lv, Wei Han, Hanbo Wang, Wenbo Bai and Jiqing Song
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Guohua Lv: Instituteof Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
Wei Han: Shandong General Station of Agricultural Technology Extension, Jinan, P.R. China
Hanbo Wang: Instituteof Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
Wenbo Bai: Instituteof Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
Jiqing Song: Instituteof Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, P.R. China

Plant, Soil and Environment, 2019, vol. 65, issue 9, 456-462

Abstract: A 2-year field experiment was carried out in loessal soil in a semi-humid climate to research winter wheat (Triticum aestivum L.) growth and nitrogen use efficiency. The result showed that subsoiling increased root penetration and promoted deep soil water absorption, which resulted in high resilience to the adverse dry climate. Soil NO3--N residue throughout the profile was decreased but increased in rotary tillage. Grain yield was significantly increased by 21.9% and 11.3% in 2016 and 2017, respectively, mainly due to the significantly larger spikes per hectare and grains per spike. Nitrogen use efficiency was significantly improved by 26.7% in 2016 and 13.8% in 2017. For loessal soil in semi-humid climate, breaking the plough pan was necessary, and it was useful for the increase of grain yield and nitrogen use efficiency.

Keywords: farming system; nitrate nitrogen; profile distribution; root growth; tillage method (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:65:y:2019:i:9:id:311-2019-pse

DOI: 10.17221/311/2019-PSE

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