Cropping Systems: Applications, Management and Impact

Increased Soil Fertility ... 109

Table 1. Yield attributes and total N uptake in a hybrid rice cultivar

Liangyoupeijiu grown under three N rates in a field experiment

conducted on a paddy soil with long-term rice-oilseed rape

rotation in 2015

Parameter N rate (kg ha–^1 )
150 120 90
Panicles per m^2 253 a 248 a 222 b
Spikelets per panicle 237 a 237 a 249 a
Spikelet filling (%) 74.4 b 74.3 b 77.2 a
Grain weight (mg) 25.4 a 25.7 a 25.5 a
Total dry weight 2113 a 2098 a 1947 b
Harvest index 0.54 b 0.53 b 0.56 a
Grain yield (t ha–^1 ) 11. 3 a 11.1 a 11. 0 a
Total N uptake (kg ha–^1 ) 209 a 207 a 196 a
Within a row, means followed by the same letters are not significantly different
according to LSD (0.05).

Figure 2. Total N uptake and N uptake from soil and fertilizer in a hybrid rice cultivar
Liangyoupeijiu grown under three N rates in a^15 N micro-plot experiment conducted on
a paddy soil with long-term rice-oilseed rape rotation in 2015. Vertical bars represent
SE (n =3).