The experiment was established in July 2008 to evaluate the effects of soil puddling depth and rice straw management on rice yields and soil fertility (Liu et al., 2012). Split block design with three replicates was applied. The plot area was 108m. The
main factor was tillage depth and the split factor was the amount of rice straw incorporation. Soil puddling tillage was performed by using a furrow plough and a rotary harrow driven by tractors with 75 and 80 horsepower, respectively, resulting in
different depths of tillage (or plough layer), i.e. deep tillage (DT, 0.25–0.30m deep) and shallow tillage (ST, 0.15–0.20m). After the plowing, the soil was puddled and smoothed by using a loaded rake. Rice stubble (50–100mm high) (C1) and total rice straw
(C2) from the previous season was incorporated into the plough layer during the first plowing. An additional treatment without organic C input (C0) was set up using a metal box (11m), which was inserted in C1 plot and there was no cropping and no fertilization.
The experiment was established in July 2008 to evaluate the effects of soil puddling depth and rice straw management on rice yields and soil fertility (Liu et al., 2012). Split block design with three replicates was applied. The plot area was 108m. The
main factor was tillage depth and the split factor was the amount of rice straw incorporation. Soil puddling tillage was performed by using a furrow plough and a rotary harrow driven by tractors with 75 and 80 horsepower, respectively, resulting in
different depths of tillage (or plough layer), i.e. deep tillage (DT, 0.25–0.30m deep) and shallow tillage (ST, 0.15–0.20m). After the plowing, the soil was puddled and smoothed by using a loaded rake. Rice stubble (50–100mm high) (C1) and total rice straw
(C2) from the previous season was incorporated into the plough layer during the first plowing. An additional treatment without organic C input (C0) was set up using a metal box (11m), which was inserted in C1 plot and there was no cropping and no fertilization.
การแปล กรุณารอสักครู่..
