A.6~10 B.10~15 C.15~20 D.20~25
A、0.01%—0.05% B、0.05%—0.1% C、0.1%—0.2% D、0.2%—0.5%
A.滴灌 B.微噴灌 C.滲灌 D.小管出流灌