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

Actions

This study is summarised as evidence for the following.

Action Category

Retain crop residues

Action Link
Soil Fertility

Change tillage practices

Action Link
Soil Fertility
  1. Retain crop residues

    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.

     

  2. Change tillage practices

    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.

     

Output references

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