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Providing evidence to improve practice

Individual study: Soil chemical properties and microbial biomass after 16 years of no-tillage farming on the Loess Plateau, China

Published source details

Wang Q., Bai Y., Gao H., He J., Chen H., Chesney R.C., Kuhn N.J. & Li H. (2008) Soil chemical properties and microbial biomass after 16 years of no-tillage farming on the Loess Plateau, China. Geoderma, 144, 502-508


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Retain crop residues Soil Fertility

A randomized, replicated experiment from 1997-2002 on silty soil in China (Wang et al.2008) found 22% higher soil organic matter, 51 % higher total nitrogen and 97% more phosphorus under no-tillage with straw cover compared to conventional tillage with straw removed. Soil microbial carbon and nitrogen increased by 135% and 104% and wheat Triticum aestivum yield by 16% under no-tillage straw cover, compared to conventional tillage with straw removed. The effects of tillage and residue retention were not separated. Two treatments were compared in a wheat crop: no tillage with straw cover (standing stubble retained and all wheat straw was left as mulch cover (3.8 t/ha), and conventional tillage with straw removed (tillage to 15 cm depth twice, majority of straw removed (0.7 t/ha remaining)). Fertilizer, herbicide and insecticide application was the same for both treatments. There were three replicates of each treatment. Each plot was 9 x 78 m. Soils were sampled in 2007 up to 30 cm depth.

 

Change tillage practices Soil Fertility

A randomized, replicated experiment from 1997-2002 on silty soil in China (Wang et al.2008) found 22% higher soil organic matter, 51% higher total nitrogen and 97% more phosphorus under no-tillage with straw cover compared to conventional tillage with straw removed. Soil microbial carbon and nitrogen increased by 135% and 104% and wheat Triticum aestivum yield by 16% under no-tillage straw cover, compared to conventional tillage with straw removed. The effects of tillage and residue retention were not separated. There were two treatments in a wheat crop: no tillage with straw cover (standing stubble retained and all wheat straw was left as mulch cover (3.8 t/ha), and conventional tillage with straw removed (tillage to 15 cm depth twice, majority of straw removed (0.7 t/ha remaining)). Fertilizer, herbicide and insecticide application was the same for both treatments. There were three replicates of each treatment. Each plot was 9 x 78 m. Soils were sampled in 2007 up to 30 cm depth.