Figure 1.
The monthly mean temperature, minimum and maximum temperature inside greenhouse from 2004WS to 2009AW in the year-round greenhouse tomato planting system in Shouguang, northern China.
Table 1.
Exogenous C and N inputs in the greenhouse tomato production system in Shouguang, northern China (kg ha-1 season-1).
Table 2.
Soil bulk density in the soil profile in Jan. 2010 in a year-round greenhouse tomato planting system in Shouguang, northern China (kg m-3).
Figure 2.
The distribution of soil organic carbon and total N concentrations in the soil profile with different N treatments in the year-round greenhouse tomato planting system in Shouguang, northern China.
Note: *, ** and *** indicate significant differences at P<0.05, P<0.01 and P<0.001, ns denotes no significant difference.
Table 3.
Distribution of the soil organic C and N pools in the soil profile of a greenhouse tomato production system in Shouguang, northern China.
Figure 3.
The distribution of the soil labile and non-labile carbon concentrations in the soil profile with different N treatments in the year-round greenhouse tomato planting system in Shouguang, northern China.
Note: Note: *, ** and *** indicate significant differences at P<0.05, P<0.01 and P<0.001, ns denotes no significant difference.
Figure 4.
Apparent N loss with different treatments in the year-round greenhouse tomato planting system from 2004 to 2009 in Shouguang, northern China.
Figure 5.
The relationship between the changes in SOC and TN concentration after 6 years of cultivation, as well as annual apparent N losses and the average N inputs in the year-round greenhouse tomato planting system in Shouguang, northern China.