Table 1 Crop biomasses and estimated N inputs under the different tillage and crop residue management systems between 2009 and 2017.

From: The influence of a year-round tillage and residue management model on soil N fractions in a wheat-maize cropping system in central China

Treatment

Mean annual crop biomass (Mg ha−1 y−1)

Mean annual nitrogen inputs (kg N ha−1 y−1)

Total N

Root biomass

Stubble biomass

Straw biomass

Grain yield

Straw-N

Root-N

Stubble-N

Fertilizer-N

NT

5.6

1.3

12.3

14.1

—

20.9

4.5

465.0

490.4

NTS

6.9

1.5

14.7

14.9

61.5

22.7

5.6

465.0

554.8

NPTS

7.3

1.7

15.9

16.2

64.3

25.3

6.4

465.0

561.0

  1. NT: no-tillage with straw removal for winter wheat and summer maize, NTS: no-tillage with straw mulching for winter wheat and summer maize, NPTS: no-tillage with straw mulching for summer maize and plow tillage with straw incorporation for winter wheat.
Back to article page