As shown in Fig. 1, soil rooted with maize was sampled three
times during the experimental period. In the 1st sampling (jointing
stage, Fig. 1a), for only inorganic N (F
) treatment, soil water
content in the wet root-zone of fixed PRI (FPRI-W) was
significantly higher than those of conventional irrigation (CI)
and wet root-zone of alternate PRI (APRI-W). For 70% inorganic
N + 30% organic N (F
2
1
) treatment, soil water content in the CI was
not significantly higher than those of the wet root-zones of PRI
(PRI-W). For 40% inorganic N + 60% organic N (F
) treatment, soil
water content in the CI was significantly higher than that of APRIW.
3